Malicious PDF — malware analysis report

Static analysis result for SHA-256 5bcd675591c47ecf…

MALICIOUS

PDF

84.2 KB Created: 2021-09-05 20:03:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 12b8a3376e33481a783e0be0f4159522 SHA-1: 0f92b2232d75331018b191c65022f2a358b62853 SHA-256: 5bcd675591c47ecfeba4dda4d3180a8b29e6b7558b9b4dc6b7f1d6dd21e2da7f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous external links, many pointing to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the overall structure indicate an attempt to deliver a payload or phish credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://crewmak.ru/uplcv?utm_term=bloodlines+book+2+pdf
    • http://richfield1960.com/clients/865265/File/davefim.pdf
    • http://noithatmyhome.com/img/files/ribirekuxirumuvonemeribow.pdf
    • https://alixdemassy.fr/userfiles/file/63879265598.pdf
    • https://maintogelonline.info/contents//files/tidokagolirirumoka.pdf
    • http://krevue.cz/UserFiles/File/watutajopuvilixuz.pdf
    • http://www.ddd-iasi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160afe6e3802d0---98051225427.pdf
    • http://4darchitecture.org/img/all/32497359956.pdf
    • https://lusagroup.mobi/images/website/user/files/87212314268.pdf
    • https://suemsas.com/wp-content/plugins/super-forms/uploads/php/files/u6n6u8oec7ra2i444qelhj2ej6/94316902006.pdf
    • http://bean2beenefamilytree.com/clients/60578/File/didiwene.pdf
    • http://www.maderas-navarro.com/ckfinder/userfiles/files/4932545695.pdf
    • http://bjhtdszdh.com/v15/Upload/file/2021820253442279.pdf
    • https://www.financedeclined.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160902efb83547---sixowodotem.pdf
    • http://anhuifan.com/upload_fck/file/2021-5-14/20210514130341158597.pdf
    • http://rokakisreunion.com/clients/a/a8/a85ca1e4cfc2bb88d767af442173b437/File/32579724877.pdf
    • https://voyageaventurenepal.com/upload/files/raguf.pdf
    • http://dajuicebarus.com/uploads/files/67215952687.pdf
    • https://youstore21.com/wp-content/plugins/super-forms/uploads/php/files/23ce8beb22f321586e3136c46acdf0ef/xoxixudewosidewamesasos.pdf
    • http://aumnat2car.com/ckfinder/core/connector/php/upload/files/jovati.pdf
    • http://ingegnasrl.com/userfiles/files/sewigudoxiguz.pdf
    • http://elm3rad.comfile/joxemanu.pdf
    • https://maxim-catering.de/wp-content/plugins/super-forms/uploads/php/files/qshjm5kk785hf449issn7v0r3j/42789821816.pdf
    • http://ar-intl.net/wp-content/plugins/super-forms/uploads/php/files/92t1eegu7usq8jo97t2r64tp50/tikirutagovugajizizono.pdf
    • http://www.ausafrica.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160ba72170ad3c---74128546336.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_off0000e3ab.bin
1e6012364794460f354829b640ae7672f8f85063775a71619544b865642ea26e
pdf-font-stream PDF embedded font (sfnt) at offset 0xE3AB 18292 bytes
font_01_sfnt_off000112ec.bin
b90d9f89e72066d4bec76a3a99bdb31f2f1dfd2d219f13ec147f020b94aaa442
pdf-font-stream PDF embedded font (sfnt) at offset 0x112EC 10536 bytes
font_02_sfnt_off00012ad5.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12AD5 16792 bytes