Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b247d23b0bd8b53…

MALICIOUS

PDF

82.5 KB Created: 2021-09-01 20:56:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 650f774d59710e810a669fbd7e959bc5 SHA-1: 1ccbf1e79933bc3064d3e6bef98a134d5b0a16f6 SHA-256: 9b247d23b0bd8b533ff9da7e55fb21cffd47c98b59c6dafe697a2dc38efdc9b9
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 a phishing trojan. The file functions as a link farm, containing numerous URLs pointing to compromised CMS uploads and disposable hosting domains, likely intended to lure users to malicious content. No scripts were extracted, but the presence of many external links indicates a phishing or redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

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://chupwo.com/editor_upload/file/71551888730.pdf In PDF document text
    • https://briljant-maleri.se/UserFiles/files/17072079058.pdfIn PDF document text
    • http://jinwoosmc.com/userfiles/file/bopafawilinivejoz.pdfIn PDF document text
    • http://mqskin.com/luutru/files/zupezisamaruvonag.pdfIn PDF document text
    • http://tauzetaques.com/clients/1/1b/1b95303171b4519794d6fee637ef680e/File/pilutilezuvinaxixujogukak.pdfIn PDF document text
    • http://elma1.ru/!upload/files/1475642643.pdfIn PDF document text
    • https://inclinedigital.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ec3f0e1730---wunanas.pdfIn PDF document text
    • https://choiceenergynetwork.com/wp-content/plugins/super-forms/uploads/php/files/da2d5b4fe0fbe1ba1f087be1fe62f813/supofitonomafojat.pdfIn PDF document text
    • https://theloneranger.tv/clients/loneranger/ckfinder/userfiles/files/74878902607.pdfIn PDF document text
    • http://www.adanakursmerkezi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a67ddda16b8---29668317380.pdfIn PDF document text
    • http://mognational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608dcd1f4f7c5---bexepebilof.pdfIn PDF document text
    • http://chandravanshi.com/userfiles/file/bifinemuji.pdfIn PDF document text
    • http://e-hematologica.com/users//file/nugepekanikitiwexatemoma.pdfIn PDF document text
    • https://mediaskills.rs/files/bijunaposejumugexekefon.pdfIn PDF document text
    • http://www.kickcommerce.com/userfiles/file/98945135130.pdfIn PDF document text
    • http://sistarelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/9852928129.pdfIn PDF document text
    • http://pro-elec.ru/ckfinder/userfiles/files/91181841356.pdfIn PDF document text
    • http://ovartec.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609cae5e1814e---refolebekejabositibujojod.pdfIn PDF document text
    • http://spearmanhsreunion.org/clients/e/e1/e1754705b4c076d7cd520c5e9e79ed07/File/buzijemezed.pdfIn PDF document text
    • https://www.jemelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bdda13b5e41---98028343712.pdfIn PDF document text
    • https://lanna-flyingclub.com/ckfinder/userfiles/files/dusosovenilejubitow.pdfIn PDF document text
    • https://mimpiindahsatu.com/contents//files/2040914699.pdfIn PDF document text
    • http://www.movingintofreedom.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c68297b666---12343107870.pdfIn PDF document text
    • http://polkovnik.su/upload/file/4986987263.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=types+of+statistical+analysis+in+research+methodologyPDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ddc3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDC3 11144 bytes
SHA-256: 7960fb064df0bfee756dd370a3395613bcc5d50ffce6cbd696ca033158d3e9a8
font_01_sfnt_off0000f768.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF768 16908 bytes
SHA-256: 1efb4b33c36a76f86f860be294bd0c9ca67e189e730d48a2530d4613f673ab0d
font_02_sfnt_off000122e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122E3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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