Malicious PDF — malware analysis report

Static analysis result for SHA-256 41f32c416fb8e891…

MALICIOUS

PDF

82.6 KB Created: 2021-07-09 18:27:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 01db1a46ee9b72915f791de98b311759 SHA-1: 38aff6579ce055b088a653bec1b15c817bc8eb12 SHA-256: 41f32c416fb8e8917097582449a3a1e2948ebdc7ea1bbb261f51bb760ad5330d
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised WordPress sites, suggesting a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery through these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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://allcreaturesinc.com/files/files/640451195.pdf
    • http://nprofit.hk/userfiles/37384956585.pdf
    • http://dirabrealtors.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f223a3f340---39312661126.pdf
    • https://mamproducciones.es/wp-content/plugins/formcraft/file-upload/server/content/files/1609b24a60cf19---3354210051.pdf
    • http://www.gametimecatering.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c929ccbab27---19032817750.pdf
    • https://floorco.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/4073caeb5ea63f7e3b7da34ca54b41aa/85524499742.pdf
    • http://szsahsh.com/uploads/files/69424352497.pdf
    • https://www.endthestigmacounselling.com/wp-content/plugins/super-forms/uploads/php/files/atgf36aqfncek2gl8f55g8tfut/60203574844.pdf
    • https://borderpak.com/wp-content/plugins/super-forms/uploads/php/files/f2e708a88b4ea541b99c10636d840c8b/dunafotejedemogogifaxawew.pdf
    • https://sckstone.com/wp-content/plugins/super-forms/uploads/php/files/514493d0c9fa02b93a98afca6d9a9d1e/temevupeki.pdf
    • http://gingerwooddesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b05658d8719---sakelaf.pdf
    • https://binhruamuinanobac.com/wp-content/plugins/super-forms/uploads/php/files/3bb5k9pued4mpofrtl1vdr1ha1/91170082005.pdf
    • http://bycongroup.com/UserFiles/file/zoguwuvapazetilal.pdf
    • http://ar-intl.net/wp-content/plugins/super-forms/uploads/php/files/a3enitpt13klonfk1esb9ngb33/nizadusularuwi.pdf
    • http://piri-piri.pl/ckfinder/userfiles/files/zomaji.pdf
    • http://www.training4thefuture.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160b30bf566c13---17761749115.pdf
    • https://www.asahinadigital.com/wp-content/plugins/super-forms/uploads/php/files/bcqsqme6t4663tr17i4danfs11/50032774203.pdf
    • https://impariant-club.ru/wp-content/plugins/super-forms/uploads/php/files/e8460bb15cf473ec2f5ef4bfb9e924af/fesagewapapedirati.pdf
    • https://singaporeroadshow.com/wp-content/plugins/super-forms/uploads/php/files/e633719ca237f2f769d7ac3ee58e7fa9/1373071637.pdf
    • http://ssujaxchapter.com/clients/83257/File/xoderuxu.pdf
    • http://srihemkuntschoolint.com/slbdavbatala/userfiles/file/12751148195.pdf
    • https://clinicscrm.com/img/files/jimugapebepiduluzujimed.pdf
    • http://www.webtony.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160bd015801ffc---83639119524.pdf
    • https://cashmeredreams.com/wp-content/plugins/super-forms/uploads/php/files/3f9fa8b97cbddb72a083f6011c5ad5c9/puvog.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=roud+meaning+in+tamil
    • 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_off0000dece.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xDECE 16792 bytes
font_01_sfnt_off0000f6e5.bin
98230fe9bef0114dca07cfd45b615c260e8aacccc976b8750d6a78b3bc1586ce
pdf-font-stream PDF embedded font (sfnt) at offset 0xF6E5 10468 bytes
font_02_sfnt_off00010e63.bin
79a0a4c2c98afb2dcccd4e2d276cb70103a4134f9f2159cc04a474a5f70123f5
pdf-font-stream PDF embedded font (sfnt) at offset 0x10E63 18996 bytes