Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6904f33bcf7b270…

MALICIOUS

PDF

71.3 KB Created: 2021-06-06 06:43:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f1213314f3656ca6d036ddce0f89780d SHA-1: b131080fe7fa29bc686b90b7b26395089fd94156 SHA-256: e6904f33bcf7b270d4670d60aff245b99e6c88557421a51b1299005181e67496
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier with high confidence. It contains numerous embedded URLs pointing to various domains, many of which appear to be compromised WordPress sites or disposable hosting. The document body is heavily obfuscated, but the presence of many external links suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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=baskerville+a+sherlock+holmes+mystery+script+pdf
    • http://tradeweb.es/userfiles/file/migokusugezupapixidoguxe.pdf
    • http://www.belladermeestetica.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607e167b8f298---kidubekefat.pdf
    • http://royalwedding.jp/images/blog//file/34950496457.pdf
    • https://www.idromeccanicasrl.com/idromeccanicasrl.com/wp-content/plugins/super-forms/uploads/php/files/05edb68e89f6a0aa30c0b34478a32eaf/juvexomuworemuke.pdf
    • http://www.justgiveahand.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a391d402181---26867562477.pdf
    • http://palami.by/images/file/307912604.pdf
    • https://humantouchtranslations.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/16086ab5a64bf7---95052597585.pdf
    • https://hsegroup.ru/wp-content/plugins/super-forms/uploads/php/files/k6co1a3344s02i2cah8nepir85/sekifonakigexixivafu.pdf
    • https://nceptionsolutions.com/wp-content/plugins/super-forms/uploads/php/files/3bff67390adc6067c90bdb1183514241/laderumenegoluj.pdf
    • https://travolution.travel/wp-content/plugins/super-forms/uploads/php/files/0bad7182fe77dba91655cf5017acecdc/67806003147.pdf
    • http://staging.impactredevelopment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d3c0127569---72813964903.pdf
    • https://chocoinmobiliario.com/wp-content/plugins/super-forms/uploads/php/files/10274e6a62e43026786e62ed32254d36/datuzikabiwon.pdf
    • http://www.rkcomdesignservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160784c3d4dcca---kavuvuk.pdf
    • https://readxyz.org/wp-content/plugins/super-forms/uploads/php/files/bac44fca814c3dcf04583d1c145b1a65/90007546258.pdf
    • http://quickvideo.nl/userfiles/file/pewusuxeno.pdf
    • https://pavaniautismschools.com/wp-content/plugins/super-forms/uploads/php/files/bqa5oimh9n9lgdfqenfp57f89u/47696891957.pdf
    • http://www.expertnutritionadvisor.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8de642d9d2---76968253781.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • 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://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d949.bin
6b2885cfe978c0fe86e10384095677f94e6aee2d2af3c2de3d3b406e7751ba73		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD949 5668 bytes
font_01_sfnt_off0000ec7b.bin
43aef1193e1ccdd20488ae43b88639a3b6369c63b5e430cebbf306a8ae37440b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEC7B 10384 bytes

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