Malicious PDF — malware analysis report

Static analysis result for SHA-256 16f1f0b399ae805d…

MALICIOUS

PDF

87.3 KB Created: 2021-06-28 23:10:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 4b0f83d2b2fc523642b50b49bb6e773a SHA-1: cbe925e485a1f2eeb0e0406054286a3d1d4741dc SHA-256: 16f1f0b399ae805d7e0555a8cab99702b1ef1bccaef71a66448538789e732d17
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The file functions as a link farm, containing numerous URLs that point to potentially compromised WordPress sites. These links likely serve to redirect users to phishing pages or further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://relaxationplusmn.com/wp-content/plugins/super-forms/uploads/php/files/437ccf5d3cd6d41f33a9314286ec98d3/2363958496.pdf In PDF document text
    • https://www.hotel-palladium.gr/wp-content/plugins/super-forms/uploads/php/files/29a3oce1e1rav4gkqrhlu03ik0/88513700217.pdfIn PDF document text
    • https://www.revistadefiesta.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f6340b2a54---19000851145.pdfIn PDF document text
    • https://andrejc.si/files/file/murexufe.pdfIn PDF document text
    • http://serendipityorlando.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa345e5cfb2---gukevoxebejeke.pdfIn PDF document text
    • https://alphacleanwashing.com/wp-content/plugins/super-forms/uploads/php/files/f58ea6843adaf8732df63cbc5b02dd87/25745222883.pdfIn PDF document text
    • http://jagatjyotischool.org/jagatjyotischool/userfiles/file/65112466928.pdfIn PDF document text
    • http://bazis-expertiza.ru/ckfinder/core/connector/php/files/xakimawixesixetowosoxa.pdfIn PDF document text
    • https://amagi.la/wp-content/plugins/formcraft/file-upload/server/content/files/160a459ed4c671---23989703203.pdfIn PDF document text
    • https://www.vibrationmonitoring.asia/wp-content/plugins/formcraft/file-upload/server/content/files/160a5eaa443ad0---2444700417.pdfIn PDF document text
    • http://chinocorporatechallenge.com/clients/6216/File/boxasirepobafikibunu.pdfIn PDF document text
    • http://nappsa.org/userfiles/file/lemon.pdfIn PDF document text
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/da67410537137cdc3a5c793a69121d19/sozadigunuv.pdfIn PDF document text
    • https://aquariumfargo.com/wp-content/plugins/super-forms/uploads/php/files/0137f54d67b9d1c08917ab0f985f4280/81612318840.pdfIn PDF document text
    • http://bodegaadrover.com/userfiles//imagenes/lorikuzolizetu.pdfIn PDF document text
    • http://sns.hu/_user/file/jujulefudiluxeg.pdfIn PDF document text
    • https://www.hit-education.com/wp-content/plugins/super-forms/uploads/php/files/hbsga25vi73k3lmue0orb2fafu/lituvuranafujanumewowam.pdfIn PDF document text
    • http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/np7kmi7m9971mevh96vnhpuiu5/55611005086.pdfIn PDF document text
    • http://sts-logistika.ru/wp-content/plugins/super-forms/uploads/php/files/a803c85c9efb34fbb469e5e281bc91c7/25846778707.pdfIn PDF document text
    • http://heilpraxis-pankow.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606c7d14e9b9c---73521155457.pdfIn PDF document text
    • http://livingkaneohe.com/userimages/163119209.pdfIn PDF document text
    • https://aashianarealty.com/file/51838099400.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=project+management+terms+and+definitions+pdfPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eb06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB06 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001031d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1031D 11048 bytes
SHA-256: 95b87a47377e01725ef9749b3e2872ea81a81dae2d8052e0a2bfceac3820653e
font_02_sfnt_off00011c97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C97 19448 bytes
SHA-256: a0f7a07d4315311762cc9c3b07b4327f782d4004073dd97f72373e3ed862add5

Open this report in the interactive analyzer, or submit your own file for analysis.