Malicious PDF — malware analysis report

Static analysis result for SHA-256 08d4b2805915bc8f…

MALICIOUS

PDF

81.6 KB Created: 2021-09-07 13:46:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 110a40ccdf61026d779af7ca7bc79b36 SHA-1: 71ef8861191c914d746110e37ee0cb58da12be86 SHA-256: 08d4b2805915bc8fa710d2422bf7e282ee53b0974e5da16f0ca6c6fd01e0f10f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable hosting, indicating a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution via 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://binarbaid.com/public_html/userfiles/file/lezelubifipidafav.pdf
    • https://skyfireconsulting.com/wp-content/plugins/super-forms/uploads/php/files/nmijng4d6tjmg9atopbpn4p9p1/tomibagibopabufawalagag.pdf
    • http://chanakol.com/ckfinder/userfiles/files/33300387707.pdf
    • https://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/968557d4954a4e1082712bd74940013c/sosatoloxivabukegezis.pdf
    • http://kyea.org/imageuploads/xodixipo.pdf
    • https://hotel-la-licorne.fr/userfiles/file/tefon.pdf
    • https://www.businesswatchguardingservices.co.uk/wp-content/plugins/super-forms/uploads/php/files/3fe6m2qafds7m5rbndgavjckrp/zimosimuzuxuxiwexiz.pdf
    • https://snabavto.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a27a797d768---tepemufuz.pdf
    • https://sakura-bashi.com/uploads//files/202108080837028172.pdf
    • http://lookupagency.es/wp-content/plugins/formcraft/file-upload/server/content/files/160c5e2c4d196a---jisileranarosojabis.pdf
    • http://alliusie.com/userfiles/file/guvobexowoxodoreremozux.pdf
    • https://www.superioreagle.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c2cb5e2d8b---ronaxisuzokufenudujop.pdf
    • http://fritz-fahrlaender.ch/download/butojufililejatexeweg.pdf
    • http://stalmont.eu/userfiles/file/79124816819.pdf
    • https://www.frankreich-ferien.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160cb9bf1da596---85448530569.pdf
    • http://kondicionery-noginsk.ru/upload_picture/file/vilipoma.pdf
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0ba627b0f3---65636154064.pdf
    • https://autoschiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/160ed9f7023581---fovetudofakikoliwazorub.pdf
    • https://kermiradiatoriai.lt/images/files/solelibakubozafusesalepe.pdf
    • https://fellowpeo.com/wp-content/plugins/super-forms/uploads/php/files/b41b74002b26537913ecf69f1727ed12/bugowuximodotarexul.pdf
    • https://cvsc.co/userfiles/file/18432002488.pdf
    • https://infravoip.com/wp-content/plugins/super-forms/uploads/php/files/8f01940ff3dfff27fd52e8801fffb1df/78142398692.pdf
    • https://rumahbaruku.com/contents//files/95313193599.pdf
    • https://regalcabs.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1609e7a0909aba---15484994458.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=resistor+smd+code+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_off0000d94b.bin
4b5ef36494aedcb1c2c2fd0aa4caddcdbf33375670d1496c335677997a7540ae
pdf-font-stream PDF embedded font (sfnt) at offset 0xD94B 10516 bytes
font_01_sfnt_off0000f13d.bin
7a05959596c1f3d16c300d86cb4a8686aefe92a19bf233f4c789f4749cc60fae
pdf-font-stream PDF embedded font (sfnt) at offset 0xF13D 18336 bytes
font_02_sfnt_off000120f1.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x120F1 16792 bytes