Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7aced0f17007309…

MALICIOUS

PDF

102.4 KB Created: 2021-07-02 20:23:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: c19a4272d63f410310859ed27eafe683 SHA-1: 6e642a47057b084f7c1feb185d8fb823fcbf9432 SHA-256: d7aced0f17007309d5f4b9df58faf04a85b06d14ff2cd8b5a560214ed2286195
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, with numerous URLs pointing to potentially compromised CMS uploads or disposable hosting. These links likely serve as a lure to redirect users to phishing sites or download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9926

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://lostsoulsmemorialnj.org/wp-content/plugins/super-forms/uploads/php/files/9f2c547737593be3500fc12da47b863f/37163102485.pdf
    • https://buddingheights.org/wp-content/plugins/formcraft/file-upload/server/content/files/160766066dfe78---govotirizigorexarilaviki.pdf
    • http://arniestribu.com/campannas/file/nowamizokiv.pdf
    • https://www.sharpeningfactory.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074743dac469---manuzesalob.pdf
    • https://g-ortho.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160815a220a1ae---mazuvajunepaf.pdf
    • https://doitsolutions.co/wp-content/plugins/super-forms/uploads/php/files/e12c84245281942db76f758c25d4a4e8/42389575753.pdf
    • http://www.etoiles-recrutement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160744c05ea8d9---biwavajinivazezobekadupor.pdf
    • https://moolans.com/uploads/files/16760882702.pdf
    • https://yuktiedu.com/wp-content/plugins/super-forms/uploads/php/files/e1f464438da0a38e8d1867d6fe0dcf87/kosonikutavafanasuf.pdf
    • https://binhruamuinanobac.com/wp-content/plugins/super-forms/uploads/php/files/bq7bofaals3mit0ag9na59ng1l/65583137005.pdf
    • https://transit-connection.com/userfiles/files/takixazaboderozat.pdf
    • https://quickonboarding.com/wp-content/plugins/super-forms/uploads/php/files/f13a918430811bddbde9475ccc302cf2/wujuz.pdf
    • http://booklandbooks.com/userfiles/file/19959411619.pdf
    • http://asupuro.com/user_data/image//file/rukaridepipewibarag.pdf
    • https://verlauf-ekb.ru/admin/ckfinder/userfiles/files/bapizifevukuk.pdf
    • https://maturana.cl/upload/file/36013280908.pdf
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608149360881c.pdf
    • https://teplitsyoptom.ru/wp-content/plugins/super-forms/uploads/php/files/5bee6890f5c853946f19bd0104ab75ff/83151818190.pdf
    • http://adaviestransportltd.com/userfiles/file/80445776493.pdf
    • http://call.ae/wp-content/plugins/formcraft/file-upload/server/content/files/16073d0b1bc14e---dasumubemak.pdf
    • http://saharun.org/uploads/ckfinder/userfiles/files/92611114035.pdf
    • https://plentis.eu/ckfinder/userfiles/files/19342584737.pdf
    • https://carstenrath.com/wp-content/plugins/super-forms/uploads/php/files/sfcf95pc87n39ci0talb2sgtco/dureku.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=stigma+as+a+fundamental+cause+of+population+health+inequalities
    • 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_off00012c68.bin
cb6892e0aa8078f08c9f6a45727753b779c607d6b2c17618a6c02a4a69e3caef
pdf-font-stream PDF embedded font (sfnt) at offset 0x12C68 11288 bytes
font_01_sfnt_off00014632.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x14632 16792 bytes
font_02_sfnt_off00015e44.bin
b8f0253604ce9b4a7caba5c04103df564438a6568fc1f1f36a5a337c5511f187
pdf-font-stream PDF embedded font (sfnt) at offset 0x15E44 17532 bytes