Malicious PDF — malware analysis report

Static analysis result for SHA-256 1eb16c9fb9e10fb0…

MALICIOUS

PDF

108.6 KB Created: 2021-07-02 03:09:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 37678e806717e6f71808efaa4557897e SHA-1: aeb8623992edd83e5645f9f60f5380314472df2c SHA-256: 1eb16c9fb9e10fb0aeb0b13057fe3c73f0a6def7587bd87015e087bca6c70ea1
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links to external websites, many hosted on compromised WordPress installations, suggesting a phishing or malware distribution campaign. The presence of PDF-specific heuristics like URI pointing to raw IP addresses and link farms further supports this. No scripts were extracted, but the overall structure and heuristics point to a malicious PDF designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9756

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://thriveelearning.com/wp-content/plugins/super-forms/uploads/php/files/00d86ffdcae2e29c4652e9df2d11308a/badawixagugen.pdf In PDF document text
    • http://viaterrestre.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608873624780a---wizisov.pdfIn PDF document text
    • https://uaqbakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a125efa8ae6---77122510259.pdfIn PDF document text
    • http://weiken-rc.com/upload/files/39039498689.pdfIn PDF document text
    • http://kaushalacademy.org/ckfinder/userfiles/files/buvurugudud.pdfIn PDF document text
    • http://webscape.co.bw/wp-content/plugins/formcraft/file-upload/server/content/files/1606f5d8789679---1160626277.pdfIn PDF document text
    • https://www.energetisch-therapeut-estie.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609cedb464ca7---52016430695.pdfIn PDF document text
    • http://chicagohalo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a520ce9709a---xamununef.pdfIn PDF document text
    • https://www.siemers-deutschmann.de/wp-content/plugins/super-forms/uploads/php/files/tcb6fdp5dp16k5sk38np6ifcvh/64589685448.pdfIn PDF document text
    • http://escolacaritas.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070a4010aaf5---25773552360.pdfIn PDF document text
    • http://sethhukumchandschool.com/userfiles/file/72166759606.pdfIn PDF document text
    • https://marosme.ro/hirek/file/xoputolebun.pdfIn PDF document text
    • http://oilmachineydy.com/d/files/jijawin.pdfIn PDF document text
    • http://brmxn.com/userfiles/file/20210528022214_8bnegu.pdfIn PDF document text
    • https://www.helpfulhunks.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160b2184b25e21---43584713405.pdfIn PDF document text
    • http://www.parinet.fi/tiedostot/files/92457659298.pdfIn PDF document text
    • http://www.birapart.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a5c98d64a6---81502751764.pdfIn PDF document text
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/1607eb228ea526---70868970296.pdfPDF link annotation
    • http://magogaralbamoble.com/galeria/files/rapugap.pdfIn PDF document text
    • http://www.maderas-navarro.com/ckfinder/userfiles/files/jewazaxunokekogosezupapuk.pdfIn PDF document text
    • http://neonatal-surgery.ru/userfiles/files/zorezagi.pdfIn PDF document text
    • http://carefirstwalkathon.com/clients/8/89/89514deb4c0e8807eb046cac28c4977f/File/47768553555.pdfIn PDF document text
    • http://leap-egypt.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a23d7a9b54d---zofidusugawabavorav.pdfIn PDF document text
    • http://www.peplex.it/wp-content/plugins/formcraft/file-upload/server/content/files/160abbe14b9c7b---92142670862.pdfIn PDF document text
    • https://www.digitalsofts.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2fcae81792---557532221.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=the+meaning+of+cringePDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fea5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEA5 23248 bytes
SHA-256: 421802f18eedc6f7bbd8910c4d05e357ed1a6f79ccb96e2a536dd6368b9e85f6
font_01_sfnt_off0001289b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1289B 4016 bytes
SHA-256: 75bbfd56be45e8f253ceb26d71c2c0f73174f4ba642c573c33a0ddcd8f51358a
font_02_sfnt_off000137a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x137A0 10436 bytes
SHA-256: f84ac3587f4eaed566fbe09d08358385539449ab2eb0b40d0bdf053310ce6fba
font_03_sfnt_off00014f07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14F07 24572 bytes
SHA-256: f19fa3b0ef852c9d44411dbf7b141d84f2182b8c67c164461ad653f72682c5ab
font_04_sfnt_off00018a90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18A90 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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