Malicious PDF — malware analysis report

Static analysis result for SHA-256 7922f3d144302a87…

MALICIOUS

PDF

77.7 KB Created: 2021-07-07 02:24:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 86a8465a4d4170320da70d3c86374ce4 SHA-1: 5e771dff2b7a5a4ab1a1f7cd803b300625ad6028 SHA-256: 7922f3d144302a871da1e4782142a1b0aef3494a7bc47726c100762c07949836
176 Risk Score

Malware Insights

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

This PDF was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. The document contains a link farm pointing to compromised WordPress sites, suggesting an attempt to host and distribute malicious content. The presence of a callback lure heuristic further supports a phishing or scam-related attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9829

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
  • 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://livestreaming.group/wp-content/plugins/super-forms/uploads/php/files/e3vecq26k0m683p16qp2h7f9k9kvk6fi/74403909932.pdf
    • http://www.belladermeestetica.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16090ad51501e5---vexifunimuwamogipagewo.pdf
    • https://www.ideaklinikkadikoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082cc9315c24---vejipuse.pdf
    • http://flirdining.com/uploads/files/85369744643.pdf
    • https://sancarspune.com/wp-content/plugins/super-forms/uploads/php/files/0c4c532d5604775be60889bee00e06d3/kesolakiz.pdf
    • http://deurwater.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c03ba9e998---monotilow.pdf
    • https://desertflying.club/wp-content/plugins/formcraft/file-upload/server/content/files/160806a8eca0da---xipenatezematagubazuno.pdf
    • http://hk-sai.com/ckfinder/userfiles/files/xesatinikelaxumi.pdf
    • https://www.finestkindcharter.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608372eb64cf7---99841632524.pdf
    • http://clinicacomciencia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609e833c86e57---45178985022.pdf
    • https://comodee.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c1818e3cdee---lafalo.pdf
    • http://gennarimaq.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a6bc35cb67a---zokarerusotelavugi.pdf
    • https://dedywiredja.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094b22dc326b---wetudeb.pdf
    • http://gerocuki.hu/user/file/14388314527.pdf
    • https://www.mnspineandsport.com/wp-content/plugins/super-forms/uploads/php/files/39d9be5a0150a22b00981b2ce4a7bd80/wozotalurikon.pdf
    • http://precedent.by/_newsite/images_from_html_editor/file/xomat.pdf
    • https://ilc.ua/wp-content/plugins/super-forms/uploads/php/files/sse56pb4bk9mkl57jgpkdjagh2/dikitixiwulusaxuwazuma.pdf
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/77778be92336fd478bdd53d5b1b7831a/kibixisifo.pdf
    • http://niengrangchuyensau.com/upload/contentFile/file/tirepifikirixat.pdf
    • http://www.vivelamusica.es/wp-content/plugins/formcraft/file-upload/server/content/files/160929054b22db---femubalagorigijeludip.pdf
    • https://schmitz.cz/res/file/11345351446.pdf
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609e06d38c496---tugixesola.pdf
    • http://euro-ex.net/images/blog//file/pexizud.pdf
    • https://heks-tech.com/app/webroot/userfiles/files/6062732679.pdf
    • http://viprealestatebrokers.com/userfiles/files/rowupegotonewuzixu.pdf
    • http://fantalife.nl/userfiles/file/vuvakekeso.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=newton%27s+first+law+of+motion+answer+key
    • 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://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ccdb.bin
f442bca939356878b32acbae884e0a9b75a583a606bd2d1cb073651ae1854d8b
pdf-font-stream PDF embedded font (sfnt) at offset 0xCCDB 16072 bytes
font_01_sfnt_off0000f666.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF666 16792 bytes
font_02_sfnt_off00010e7d.bin
e9e97be720d12f23b8e19301933ebbbd2ffb40e2a4509de488f0b17d720a5084
pdf-font-stream PDF embedded font (sfnt) at offset 0x10E7D 10680 bytes