Malicious PDF — malware analysis report

Static analysis result for SHA-256 6474f85493370bda…

MALICIOUS

PDF

81.3 KB Created: 2021-09-13 01:57:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 0d85ee6907a3f4bec74918f904538c1c SHA-1: 538e9a93735c21301ac3dbdfc343fcb35823ead8 SHA-256: 6474f85493370bda93870eff79180674d9ef91931eccf923fa29dc08ea41276b
196 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier, and it exhibits characteristics of an advance-fee scam. It contains numerous links to external PDFs, many hosted on compromised CMS upload storage or disposable hosting, suggesting a link farm designed to distribute further malicious content. The presence of these links and the scam lure strongly indicate an attempt to trick users into downloading and opening malicious files.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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://drafthe.ru/uplcv?utm_term=kairali+tv+live+now
    • http://flapboxes.custompackageboxes.com/userfiles/files/77442821897.pdf
    • http://interroadholland.nl/userfiles/file/kokowasazidilopelikij.pdf
    • https://solener.info/ckfinder/userfiles/files/63244245920.pdf
    • http://alhouti.com/userfiles/file/bolikuv.pdf
    • http://randoquad72.fr/userfiles/file/kimopajazinutomidobobef.pdf
    • https://www.geosuiteonline.de/wp-content/plugins/formcraft/file-upload/server/content/files/1612ff71fbd4a7---42210520311.pdf
    • http://reichspfarrer.sk/file/soxerexekukenej.pdf
    • http://asustainable.com/global/file/lijilotubimusuje.pdf
    • http://geoass.eu/userfiles/files/92940952694.pdf
    • http://phutungquanghieu.com/app/webroot/files/ckfinder/files/tirivufelakata.pdf
    • http://jtipartner.com/ckfinder/userfiles/files/97334454079.pdf
    • http://chataphan.com/file_media/file_image/file/45552178804.pdf
    • https://joefairless.com/wp-content/plugins/super-forms/uploads/php/files/34f81ebb3983e01d19a27da100118165/vatepotidubevenore.pdf
    • https://montpellier-business-plan.com/mbp/upload/images/images/upload/ckfinder/xakesenorenagixerag.pdf
    • http://nemeckystrakac.sk/editor_uploads/files/xulewupum.pdf
    • https://globalathena.com/ckfinder/userfiles/files/siwufaj.pdf
    • http://farmina.ru/uploads/files/88825867285.pdf
    • https://tomclarkvoiceovers.com/userfiles/files/66320484711.pdf
    • https://khogiaydantuonghanquoc.com/images/news/file/gumitivo.pdf
    • http://mskabel.cz/UserFiles/File/67290980189.pdf
    • http://china-engine.net/ckfinder/userfiles/files/19928243475.pdf
    • http://perevodvnegiloifond.ru/pict/file/56870752774.pdf
    • https://incoyun.com/calisma2/files/uploads/nenawixurex.pdf
    • http://recamonde.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613e7021571f4---lumapedil.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_off0000db1c.bin
36153294677fa940257f3f89440e03dca7a355dd036d2cc743f05eb608c8a003
pdf-font-stream PDF embedded font (sfnt) at offset 0xDB1C 10076 bytes
font_01_sfnt_off0000f1ae.bin
5902dcdd256b4e2bf69dd087240df018fd8f7816778a6d3825e6c98c2540e6d7
pdf-font-stream PDF embedded font (sfnt) at offset 0xF1AE 17704 bytes
font_02_sfnt_off00011f82.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11F82 16792 bytes