Malicious PDF — malware analysis report

Static analysis result for SHA-256 e649d491b82f6893…

MALICIOUS

PDF

99.2 KB Created: 2021-09-06 18:16:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: bd3216f4c88ffc97460ffc8d43cf5e1a SHA-1: 8541b8d747d77cd29046ab6f7add32c2389486d1 SHA-256: e649d491b82f68938176ac215af11b89f06df228f7de272557bc7d330c38fd58
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised CMS upload storage and disposable hosting, indicative of a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution through these external links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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://numen-wow.com/userfiles/cloud//files/36260433834.pdf
    • https://fotobolfestmeny.hu/mvc/userfiles/file/46475807172.pdf
    • http://melissajacksonmd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e5994ad121---jatumekagegud.pdf
    • https://lion-trading.co.uk/wp-content/plugins/super-forms/uploads/php/files/966q034ahul2con9f7f48tu7gk/73402673128.pdf
    • http://nileagriculturalindustries.com/file/3020880192.pdf
    • http://primaneighbors.com/userimages/78182972463.pdf
    • http://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607942d13c89f---rupodugo.pdf
    • http://informerfitness.com/wp-content/plugins/super-forms/uploads/php/files/294062b063d7753d07eaa77a41802aa8/26610490758.pdf
    • http://kalikraft.com/images/file/vedir.pdf
    • http://unityproductions.com/upload/files/sukumopedegom.pdf
    • https://bandotrading.it/uploads/file/44839919767.pdf
    • https://myvideoclasses.com/ci/userfiles/files/64412468756.pdf
    • http://maquinandoysubastando.com/dleyes/admin/fotos/file/50079031097.pdf
    • https://glowskincare.net/wp-content/plugins/super-forms/uploads/php/files/49e99d14abf950d5eb671f36757aadd5/lataroxibopafogagamoxuvem.pdf
    • https://lashmakerpro.it/wp-content/plugins/super-forms/uploads/php/files/v0p3av2k0rkj3qd5jmu77a2m33/48904779275.pdf
    • http://gerd-pollak.de/userfiles/file/73988392155.pdf
    • https://sindonis.com/userfiles/file/25330643277.pdf
    • http://branonperformance.com/ckfinder/userfiles/files/77617988751.pdf
    • https://tidaksusah.com/contents//files/37092955987.pdf
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/35f5b325fe566a6bc21544464d8e8fab/duzapudoj.pdf
    • https://telewebmarketing.com/FCKeditor/file/pulelazirimujagorivopoz.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=potong+dokumen+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_off0001233d.bin
66f2040e1fe6f659fc641192555cab3ef3ebcbc467a3b3413d0cc1ea97130240
pdf-font-stream PDF embedded font (sfnt) at offset 0x1233D 10468 bytes
font_01_sfnt_off00013ad4.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13AD4 16792 bytes
font_02_sfnt_off000152e6.bin
07cfc082706ac9182fe2ad82592d8abc7f9cfe65b13116bf8b4c553ed1e5eee8
pdf-font-stream PDF embedded font (sfnt) at offset 0x152E6 17052 bytes