Malicious PDF — malware analysis report

Static analysis result for SHA-256 29c5689b58ab7292…

MALICIOUS

PDF

110.7 KB Created: 2021-07-16 05:15:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 524b65268b52b6e0fe65c722874f76bb SHA-1: 9e86d7873388755da13ec6e5951372ac8fbcf357 SHA-256: 29c5689b58ab7292ac68dfc8cf260e82f4acf7602af3b898d4161a88e8d776dd
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The ML classifier and ClamAV detection strongly indicate maliciousness. The PDF contains a link farm pointing to multiple compromised WordPress sites, suggesting an attempt to distribute phishing or malware. While no scripts were directly extracted, the PDF structure and URL patterns are consistent with phishing lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c05ca65a25c---70384401763.pdf
    • http://www.annaleehuber.com/content_files/file/43647176538.pdf
    • https://htfcompact.com/wp-content/plugins/super-forms/uploads/php/files/a4a0ef3b40d0178de7fe01dd832f019b/66809635306.pdf
    • http://hungthanhauto.com/luutru/files/fijejexobuxazodufududib.pdf
    • http://waberry1969.com/clients/877040/File/83495953066.pdf
    • http://dirabrealtors.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ce15f5d96c6---sipoke.pdf
    • http://worksafeorg.com/wp-content/plugins/super-forms/uploads/php/files/rt20kclsepc05o28dlo6el4g40/24342395327.pdf
    • http://visualpaint.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b490b336b2---74348599804.pdf
    • http://blpest.com/UserFiles/file/59051514829.pdf
    • http://imhkayseri.com/resimler/files/vozegilopod.pdf
    • http://plenar.hr/wp-content/plugins/formcraft/file-upload/server/content/files/16075bdfc693e4---jaxevi.pdf
    • https://www.criteriainvest.com.br/wp-content/plugins/super-forms/uploads/php/files/rnlde7sum9sjmfjdio1p93tonu/98217360849.pdf
    • https://www.sacproblemleri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c1b18493784---29723748824.pdf
    • http://dabien.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/1607fa114628af---41509582964.pdf
    • http://zeguvietnam.com/uploads/ckfinder/files/67271848035.pdf
    • https://iescolumbus.org/wp-content/plugins/super-forms/uploads/php/files/4956ea7aea86956783296f8d18489d23/12366533465.pdf
    • http://nhs1966reunion.com/clients/1/1c/1ca8f1639ee69cd7806809ed3bcda9bb/File/gezur.pdf
    • https://holzhaus-suedtirol.it/wp-content/plugins/formcraft/file-upload/server/content/files/1606cbe03d9dab---62097993132.pdf
    • https://investmentskillsgroup.com/images/userfiles/file/gosojojumodawiguget.pdf
    • http://yngc.ru/admin/ckfinder/userfiles/files/79173552387.pdf
    • http://mygotour.com/FileData/ckfinder/files/20210607_E3BBBA66AD119CC0.pdf
    • https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/1bc6b16855769527978c850b30573e15/kupugokoluduvuvovalonak.pdf
    • https://bisnismedsos.com/userfiles/file/60678274575.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=dot+product+equal+zero
    • 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_off00014bbb.bin
7a855cae07f28de342622522d0f13b1bca696585075c5c3e851bb3dd662726ce
pdf-font-stream PDF embedded font (sfnt) at offset 0x14BBB 10448 bytes
font_01_sfnt_off0001635f.bin
6f09a51ad4d66835dfc01c046317e82049fc80c7ac188dbc942aafc3bbee007d
pdf-font-stream PDF embedded font (sfnt) at offset 0x1635F 18904 bytes
font_02_sfnt_off00019577.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x19577 16792 bytes