Malicious PDF — malware analysis report

Static analysis result for SHA-256 0bfe544a2c250415…

MALICIOUS

PDF

81.9 KB Created: 2021-06-12 06:15:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 1492b501609b24e726261cad842661a8 SHA-1: 23405e3a2bf0ece5afcde6ca9a78693a0191b6bd SHA-256: 0bfe544a2c25041547712910b19838099684dc75bf8bb935c88a30c0e2eb959f
164 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, indicating a phishing or trojan distribution attempt. It contains numerous embedded links pointing to compromised WordPress sites, likely serving as a link farm to host malicious content or redirect users. The presence of a 'download button' heuristic further suggests a lure to trick users into downloading a payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://philabc.ru/uplcv?utm_term=gameshark+ps2+emulator PDF link annotation
    • https://sygimportaciones.com/wp-content/plugins/super-forms/uploads/php/files/55jabo3hnuvc8l2kabe4lqcb6j/16496649301.pdfIn PDF document text
    • https://tfnd.org/wp-content/plugins/super-forms/uploads/php/files/f01dfa8635d9a6d9eef1b65e261bc1fd/20336735137.pdfIn PDF document text
    • https://razdolle.by/wp-content/plugins/super-forms/uploads/php/files/dg7mkqbmqfi4vgf082rkvan2g5/xomuvefanav.pdfIn PDF document text
    • https://rosemonttherapy.health/wp-content/plugins/super-forms/uploads/php/files/afktqvv5rll0ifol5u8a1ti808/rokegejazawexox.pdfIn PDF document text
    • http://andreagarciam.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070b29405df2---37351448625.pdfIn PDF document text
    • http://ttlengenharia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160ab376de8701---gokanuputagodafuf.pdfIn PDF document text
    • http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/ppppk56ihil38lvp80ji61a746/50311046858.pdfIn PDF document text
    • http://thanuyentea.com/ckfinder/userfiles/files/3629903844.pdfIn PDF document text
    • https://earthchartercities.org/wp-content/plugins/formcraft/file-upload/server/content/files/160af5c1c65c6b---94843330697.pdfIn PDF document text
    • https://www.grandeprairie.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609231af0d60a---lolami.pdfIn PDF document text
    • https://banghenails.com/upload/file/40482034135.pdfIn PDF document text
    • http://coffee33.ru/archive/file/85871151209.pdfIn PDF document text
    • https://loskutova.site/wp-content/plugins/super-forms/uploads/php/files/17396ac1a80518c6d0348ce6588cbf7a/bewanerol.pdfIn PDF document text
    • https://loan-financial.com/wp-content/plugins/super-forms/uploads/php/files/c45b5e67f2f4c4e0c86eb3fa8d4141ab/49203851501.pdfIn PDF document text
    • http://brandnewgoods.net/userfiles/file/92831624124.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eae7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAE7 5284 bytes
SHA-256: 255a6fc3d6142163e253cfcfa02e6a81033d8dd8880dacaa77d2f0569ca93457
font_01_sfnt_off0000fcb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCB7 12120 bytes
SHA-256: 79d3a940bfac9c92d9138d73aa6e46b6a1bf5435367ddc6c407868d3bacd7a63
font_02_sfnt_off00012509.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12509 16124 bytes
SHA-256: 1ee8803ce992a1df42b2ad5e8a247328ac27867f3a4da8edf739c542d2d4e8c2

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