Malicious PDF — malware analysis report

Static analysis result for SHA-256 96bf0064aeedce2f…

MALICIOUS

PDF

81.6 KB Created: 2021-06-29 08:14:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 4718f47d55adcb1fd21dcdc18ad8bdf5 SHA-1: 1644fb2326b049096b8df96aedfe1e2edea40b42 SHA-256: 96bf0064aeedce2fe891d045485de455d796c58c99da18e4bbacefda08dee0ab
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains a link farm pointing to compromised WordPress sites, suggesting an attempt to redirect users to malicious content. The presence of numerous links on disposable hosting and the use of 'utm_term' parameters indicate a potential SEO poisoning or phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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 http://trainternational.in/wp-content/plugins/formcraft/file-upload/server/content/files/1609babbcc6f7c---tabasawixagarilafi.pdf
    • https://trsbarriersdirect.com/wp-content/plugins/super-forms/uploads/php/files/gfm629jj0h7rbru7mktbas8pd1/natoredonuxed.pdf
    • https://boldvision.tv/wp-content/plugins/formcraft/file-upload/server/content/files/1609eb503a1793---tarobanogubon.pdf
    • http://elonsummerstorage.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7c4ef3fa36---58572190707.pdf
    • https://www.sabiamente.es/wp-content/plugins/formcraft/file-upload/server/content/files/1608e78679f7ad---sewibeju.pdf
    • https://www.picmephotoboothhire.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160845dd87b348---36849367306.pdf
    • https://mvpartners.be/images/uploadedimages/file/61921692858.pdf
    • http://lev-steklo.ru/userfiles/file/bivetorades.pdf
    • https://brunoamaranti.it/wp-content/plugins/super-forms/uploads/php/files/0q4jmqhi5gpt8ufvbeam569ea1/21571714717.pdf
    • http://jkmdc.com/aversystem.com/userfiles/file/pedanixa.pdf
    • http://juniorsmagazine.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086c6efb88e4---16316848161.pdf
    • https://asiatravel.kg/wp-content/plugins/super-forms/uploads/php/files/1b01b742a2b4f0a37b3abd94ad180cd3/femazatiwuwelogesafe.pdf
    • http://conwaychristian.org/wp-content/plugins/formcraft/file-upload/server/content/files/160aa16b6a85a0---33461720419.pdf
    • http://schodylux.pl/userfiles/file/42030671523.pdf
    • http://english-island.pl/wp-content/plugins/super-forms/uploads/php/files/b2gt6t2q7id30orh6re3ukfgm3/wavulupagijajewapuni.pdf
    • http://bhttourist.com/upload/fckimagesfile/dukefa.pdf
    • https://www.hediyevideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160af8b9d5781b---natakizetobamagataloj.pdf
    • https://www.lesson-online.org/wp-content/plugins/super-forms/uploads/php/files/uufdc3c5kf8g62nkb1jm8jqi44/41443462997.pdf
    • http://soft-pro.hr/upload/datoteke/jisemuletavusogimat.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=information+extraction+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_off0000df6e.bin
4c70bcd2db5894ca90fa4d6c60aedcfadd2233f00fa37140ece6d5e246692b8e
pdf-font-stream PDF embedded font (sfnt) at offset 0xDF6E 10620 bytes
font_01_sfnt_off0000f7b2.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF7B2 16792 bytes
font_02_sfnt_off00010fc4.bin
965b79304515a4019ab8f505e84e938c9a229be2cdd2b3e2b338161e6dc438da
pdf-font-stream PDF embedded font (sfnt) at offset 0x10FC4 16272 bytes