Malicious PDF — malware analysis report

Static analysis result for SHA-256 8fae0c7bf98ea964…

MALICIOUS

PDF

88.7 KB Created: 2021-06-27 04:22:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 47811ae332c61db3801d80fe028af3a7 SHA-1: 4b6e512d56831a4f843e930be8463ee583493dae SHA-256: 8fae0c7bf98ea9649c7666402b0a44a3842c68b678d1df3ed4ad1e672a8d2f07
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by multiple heuristics as a malicious advance-fee scam lure, and ClamAV detected it as a phishing trojan. The document contains numerous links pointing to compromised CMS upload storage and disposable hosting, likely intended to redirect users to malicious content or phishing pages. No scripts were extracted, but the overall structure and heuristic firings strongly indicate a social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 http://kennyre.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b1dadc58bfc---loseverele.pdf
    • http://ahxxzx.com/userfiles/202105/file/74321866909.pdf
    • http://nuyewpilot.academy/wp-content/plugins/super-forms/uploads/php/files/82c3cb607c381a692fda0b8ec7d0f835/78458617404.pdf
    • https://2acontractor.it/images/file/susoxuxisamenozawu.pdf
    • https://www.cibaospalaser.com/wp-content/plugins/super-forms/uploads/php/files/dtnkkp29cpeujc5i1p3l3shakf/tipulagevakimodebumuwamew.pdf
    • http://www.k-24.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d51b2e6738---8119482470.pdf
    • https://idfusionllc.com/wp-content/plugins/super-forms/uploads/php/files/f58121e88548cf22c9e9a3fcfd605086/rojotelenisatu.pdf
    • http://blog.crowdly.com/wp-content/plugins/formcraft/file-upload/server/content/files/160942ca648921---gebenafutavesus.pdf
    • https://realestateconnect.biz/wp-content/plugins/super-forms/uploads/php/files/9si1rflmqhrda4dsqq7hrc7ne6/28889879739.pdf
    • https://www.tai.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1607627f6d232d---perivugikojaxivog.pdf
    • http://kojeneckezbozi.eu/userfiles/file/menejaxiwumaw.pdf
    • https://victory-agency.com/wp-content/plugins/formcraft/file-upload/server/content/files/160902af52be2b---jupotu.pdf
    • https://euroroma-bg.org/files/file/67600044612.pdf
    • http://jingluo.net/uploadfiles/files/92117497245.pdf
    • https://dutchfansitenetwork.nl/ckfinder/userfiles/files/metupatoduwitif.pdf
    • https://lea-inc.com/wp-content/plugins/super-forms/uploads/php/files/afb475208f5bc105896b62e863ae923e/5406844245.pdf
    • http://www.caribbeandentist.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086c41cbcd1b---35224949026.pdf
    • http://www.contectrade.hu/fckfiles/file/sosuma.pdf
    • https://malimbe.africa/wp-content/plugins/super-forms/uploads/php/files/c22c68f5e7af6936a3ff91a2abeea432/98304308044.pdf
    • https://bharatbiodiesel.com/userfiles/file/jofoxemubulo.pdf
    • https://www.jemelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0c47eaea69---15522862655.pdf
    • https://www.properties-thassos.com/wp-content/plugins/super-forms/uploads/php/files/q35g503virvr2n8ec8mdlofv3t/42360153005.pdf
    • http://texmet.pl/userimages/file/83880746727.pdf
    • https://vansuloi.com/uploads/userfiles/file/bonewimizovuxek.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=the+virginian+clu+gulager
    • 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_off0000f90a.bin
503b2d51f2d0afc685ddf58c57a40fc5f9ae5f354774faa1f06c4168c8ed6dfc
pdf-font-stream PDF embedded font (sfnt) at offset 0xF90A 10252 bytes
font_01_sfnt_off00010fff.bin
2680d62c732baf9824bd1f9774092f9a12456e15abfad8d235f4c66da902c7c2
pdf-font-stream PDF embedded font (sfnt) at offset 0x10FFF 17572 bytes
font_02_sfnt_off00013dda.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13DDA 16792 bytes