Malicious PDF — malware analysis report

Static analysis result for SHA-256 95543182f8783d44…

MALICIOUS

PDF

92.9 KB Created: 2021-07-04 06:18:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 382df5dc2538c89926c0872d875d41d0 SHA-1: 2c2150fde79e6e468c9b463cc690c12177c72416 SHA-256: 95543182f8783d44b7f9227a6ec9b54ef5d2d7430cb772ae22b0d45523a6e2ba
196 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many of which appear to be compromised or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The heuristic 'SE_ADVANCE_FEE_SCAM_LURE' strongly indicates the document's purpose is to deceive users with fake lottery or prize notifications, a common tactic in advance-fee fraud. The ML classifier and ClamAV detection further support the malicious nature of this PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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://nomylo.ru/uplcv?utm_term=fulbright+scholarship+courses
    • https://sellos-mecanicos.com/wp-content/plugins/super-forms/uploads/php/files/8248867d389eb68c6a644a4cd02e7add/55742045016.pdf
    • http://findmecakes.com/userfiles/files/mafola.pdf
    • http://botosani.ro/img/uploads/file/bewawigagepujowatudikibam.pdf
    • https://propbrains.com/wp-content/plugins/super-forms/uploads/php/files/ddf4ncqsvd1hgsn84o88k5cl12/60366289383.pdf
    • http://feach.ie/images/uploads/file/toverabuvibopigiziru.pdf
    • https://aryaayur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609de255af08a---fugeful.pdf
    • http://ziepniekkalns.lv/wp-content/plugins/formcraft/file-upload/server/content/files/16083e45f9c628---gonotapodolanatali.pdf
    • https://goodluckfishing.com/ckfinder/userfiles/files/xavolo.pdf
    • http://rsst77.ru/upload/files/92934829790.pdf
    • https://luxurytravel-show.com/wp-content/plugins/super-forms/uploads/php/files/b1e28b39855dd8b4ca4519926b0d2a38/96854324891.pdf
    • http://chicagohalo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b8011c29ae8---33778781983.pdf
    • http://grupogmec.com/wp-content/plugins/formcraft/file-upload/server/content/files/160814e52d72bb---nasigisomojaroli.pdf
    • http://victorylimo1.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083dfec15285---zafixibudi.pdf
    • https://jamiatulbanat.in/wp-content/plugins/formcraft/file-upload/server/content/files/160c35e948c2ca---69085884658.pdf
    • http://harryreichert.de/uploaded_pics/News/file/3309691890.pdf
    • https://www.denisonlandscaping.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608536afe08a3---rojanavaditisabimefopapi.pdf
    • http://dralituncer.net/userfiles/file/buxufofunewilovozorijise.pdf
    • http://geostudio.eu/userfiles/files/julimewivalibid.pdf
    • https://computerzone.pk/file/3382507545.pdf
    • http://99hospitalitygroup.com/ckfinder/userfiles/files/nubovezixawalunigujuxaga.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_off0001082f.bin
e034e95015399aca185a35a5b5e89f6757ee4bd213f16d74795a24754a8972bf
pdf-font-stream PDF embedded font (sfnt) at offset 0x1082F 10764 bytes
font_01_sfnt_off000120d8.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x120D8 16792 bytes
font_02_sfnt_off000138ea.bin
dc4409f3f116cfced6f39f7c29605e75975d63eed75e4d4c6edfd3a9d78fe331
pdf-font-stream PDF embedded font (sfnt) at offset 0x138EA 17500 bytes