Malicious PDF — malware analysis report

Static analysis result for SHA-256 e93aa35614786507…

MALICIOUS

PDF

74.9 KB Created: 2021-06-11 05:18:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: c8f633885882c1440600d1a0597b55ea SHA-1: 49d2950de470ae6e381aef20fcd40bbc25bb99b2 SHA-256: e93aa35614786507bcb069e74ca5fe8f976be35bcc80920b6aae34bce1c9db0e
156 Risk Score

Malware Insights

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

This PDF document is classified as malicious by ML and ClamAV, and contains numerous links to external sites, many of which appear to be compromised WordPress installations. The document body, though heavily obfuscated, contains text related to downloading "Igo primo windows ce 6.0", suggesting a lure for users seeking this software. The presence of external links and the nature of the heuristics strongly indicate this file is part of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://nomylo.ru/uplcv?utm_term=igo+primo+windows+ce+6.0+download PDF link annotation
    • https://www.ogblfrontaliers.fr/wp-content/plugins/super-forms/uploads/php/files/48qbqc1rbvmuholdc5nafcopol/zavadaxe.pdfIn PDF document text
    • https://benchmarktransitions.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095aee33764b---82376743507.pdfIn PDF document text
    • http://aiswaryamatrimonials.com/fck_uploads/file/10352812551.pdfIn PDF document text
    • https://tfnd.org/wp-content/plugins/super-forms/uploads/php/files/df0f2a3221ef65b2fe1637c1e581b8ed/22714028729.pdfIn PDF document text
    • https://mytopics.it/uploads/file/92826146626.pdfIn PDF document text
    • https://www.phoenixdentalacademy.co.uk/wp-content/plugins/super-forms/uploads/php/files/97c302fa2b7632d06effa1699f539f67/gewuxoxuwafateloxabobe.pdfIn PDF document text
    • http://www.franklinwebdesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f3fe2a43fc---getimofetuvegirajikivetel.pdfIn PDF document text
    • https://baconbites.com/wp-content/plugins/super-forms/uploads/php/files/00lgbhuv9fnt3d7mpa1f0pssf1/lobimolutimu.pdfIn PDF document text
    • https://kvartira-zalog.ru/wp-content/plugins/super-forms/uploads/php/files/bb60b0faa5324ebddb8877080c852f30/rivubunubasobilamimomenu.pdfIn PDF document text
    • https://sellos-mecanicos.com/wp-content/plugins/super-forms/uploads/php/files/3514af6a871d55f0426487260de159ae/peruwelemorufegezezawek.pdfIn PDF document text
    • http://grupogmec.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a81c6e1ec8c---45756283043.pdfIn PDF document text
    • https://www.onestopnaturalstore.ca/wp-content/plugins/super-forms/uploads/php/files/lm0s6chgnb9ticg4kd1i3ai2pl/xibulepigesofako.pdfIn PDF document text
    • https://joepromenshealth.com/wp-content/plugins/super-forms/uploads/php/files/d6bfa5c9108d64c0e1e73203ae0b1c55/pobugixiwuvikiwevaja.pdfIn PDF document text
    • http://2ds-creations.fr/userfiles/file/1121255902.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e6e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6E9 5748 bytes
SHA-256: f775e0857f64f25f249ddc03e36460d5109afa5e6cd2612538907f5b843ff29e
font_01_sfnt_off0000fa81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA81 10200 bytes
SHA-256: 0d441380b131f972f5eeefc30badf1fce8d095255801b77335362521eca557e1