Malicious PDF — malware analysis report

Static analysis result for SHA-256 017312d564961ace…

MALICIOUS

PDF

77.7 KB Created: 2021-09-05 00:33:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 980e809451a400f994e2239612d94c12 SHA-1: cb78fabe42f0b2c8faa2f076999a489571210bba SHA-256: 017312d564961ace6e89fefb2ac37f6c4d922c921bba1bdc8b39d6ab416952de
176 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains a link farm pointing to multiple compromised WordPress sites, suggesting an attempt to distribute further malicious content or phish users. The document body is heavily obfuscated and unreadable, but the presence of numerous links to potentially compromised sites indicates a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

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://alternativefitness.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160c41844caa11---bofotilolidakavofasum.pdf
    • https://extremetour74.ru/wp-content/plugins/super-forms/uploads/php/files/5ea67f83e534eb9937b696ce92262ff0/zatujuvikuzujafinawox.pdf
    • http://www.vikingmaterials.com/img/sowuxogozizewoj.pdf
    • http://mevlanaasm.com/resimler/files/wevumanufarusa.pdf
    • https://syntellect.ru/Repository/file/23152576075.pdf
    • http://www.mvdisposal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a5f07dd419---47300620634.pdf
    • http://andrelandberg.com/userfiles/file/23112485976.pdf
    • http://pulsrmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c4785d2cff2---50728609522.pdf
    • http://golden-candies.ru/webroot/files/files/mutomabofusuxo.pdf
    • https://oxi-dental.ro/imagini_ws/39585876388.pdf
    • http://www.derbysignandgraphics.com/uploads/file/86032896218.pdf
    • https://realimpacto.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160af702146ddc---kugoka.pdf
    • https://fiambreszav.com/wp-content/plugins/super-forms/uploads/php/files/f31992ab9c29eff11c6a1ec5c840d25e/wipofa.pdf
    • http://aci-immobilier-douai.fr/userfiles/files/wenadoriwukexawaxawiliv.pdf
    • http://legendtec-eg.com/wp-content/plugins/super-forms/uploads/php/files/7s8s3kcqnrqrnecto05tv5rrg0/42503437205.pdf
    • https://empresa-venta.hr/files/12965054453.pdf
    • http://starwindows.ie/ckfinder/userfiles/files/viwiliwi.pdf
    • https://www.sharpeningfactory.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608489a513cf1---fiwawaso.pdf
    • http://stopasbestos.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160fe840b50d92---78269865466.pdf
    • http://yongqingtech.com/d/files/45086718693.pdf
    • http://wsp.pl/userfiles/file/89400039850.pdf
    • http://itssilvertime.com/clients/2/24/24efe347a73a8ce028152bf895bc11a7/File/fitiloxi.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=sahidic+coptic+dictionary+pdf
    • 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_off0000c7fa.bin
6f2b27b73396ad896c3032deec10c18ae9b77d34ddb91eae7e0082c320d212dc
pdf-font-stream PDF embedded font (sfnt) at offset 0xC7FA 10560 bytes
font_01_sfnt_off0000e00f.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE00F 16792 bytes
font_02_sfnt_off0000f821.bin
ce5db9d6b4a8dea4895f1bf85636223f99fb57ad4b6d33715601773e9cc50ff8
pdf-font-stream PDF embedded font (sfnt) at offset 0xF821 19220 bytes