Malicious PDF — malware analysis report

Static analysis result for SHA-256 e17d35674a54625b…

MALICIOUS

PDF

78.2 KB Created: 2021-06-20 08:58:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7edd1e8da24a1a5fa568bb306ef2e6cd SHA-1: 13ef7e673240265508e90395f1243a1db0d3afdd SHA-256: e17d35674a54625bf59b734f035146a63901a53e06eaedfcb43333b302c918d2
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF document was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, suggesting an attempt to redirect users to malicious content or phishing pages. The document's structure and embedded links indicate a lure to facilitate initial access, likely through spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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 http://humanitool.ru/userfiles/file/zimogozo.pdf
    • http://accurateverdicts.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070139f33037---3317372634.pdf
    • https://stellabakingcompany.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c1b34e252d---xuxuwuxo.pdf
    • http://quiltingacademy.info/fckeditor/userfiles/file/67091595728.pdf
    • https://ceadersvalet.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079253f8c053---wasur.pdf
    • https://schreinerheusi.de/wp-content/plugins/formcraft/file-upload/server/content/files/16081eb7ef1a00---33423170047.pdf
    • http://bike-aholic.com/UserFiles/file/60995906416.pdf
    • http://elmiraclassiccountry.com/wp-content/plugins/super-forms/uploads/php/files/62f5v50fsoia2ap3pt0jpn55n0/7798805190.pdf
    • https://lapalettedesarts.fr/gestion/file/86818449885.pdf
    • https://apexforestservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091e26357a85---perigaluzisomugo.pdf
    • http://camionespanamericana.com/userfiles/file/10627655011.pdf
    • http://aklond.com/UploadFilesfile/%5C/2021050101501638.pdf
    • https://www.die-umzugsfabrik.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f921488ff2---gotawapajavetujopinubale.pdf
    • https://tehnol.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16086f39df0b7e---befatoge.pdf
    • https://wilsonbarrera.com/inicio/wp-content/plugins/formcraft/file-upload/server/content/files/16094b19230af2---66023196793.pdf
    • https://www.llgnjinc.com/wp-content/plugins/super-forms/uploads/php/files/1ff17af4b4934c0aba5b359b1cd80c42/gexaravutu.pdf
    • http://leap-egypt.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088df0419a43---vujosisevo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=general+knowledge+questions+for+12+year+olds
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f262.bin
e6eaad1ff154d24ad76c9552839a77fb70bc51f099c9c1c65fd298c274babf3b
pdf-font-stream PDF embedded font (sfnt) at offset 0xF262 5672 bytes
font_01_sfnt_off000105e3.bin
dbb3f9d42c5628748a879c228dd0663f307bf7dcc79225857d2f6bba27aa9852
pdf-font-stream PDF embedded font (sfnt) at offset 0x105E3 11220 bytes