Malicious PDF — malware analysis report

Static analysis result for SHA-256 085bf931908108ec…

MALICIOUS

PDF

75.1 KB Created: 2021-02-20 09:51:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 8575fb9cc29035616b9b564ed202bf55 SHA-1: 5db03562863ae134f42731e784bf80a237d5e205 SHA-256: 085bf931908108ece19f2e24aa070b74db9dbcac9b9699aa05f67f537096eb96
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with one pointing to a suspicious URL that appears to be part of a phishing or malware distribution campaign. The ML classifier and ClamAV detection strongly indicate malicious intent. The document's structure and embedded links suggest it's designed to redirect users to potentially harmful content, masquerading as a legitimate document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://baarspo.ru/strik?utm_term=california+association+of+realtors+residential+lease+agreement+2018 PDF link annotation
    • https://cdn.sqhk.co/mujawiru/iiamzii/51753549592.pdfIn PDF document text
    • https://cdn.sqhk.co/vibebexez/P0XiarK/radiant_heat_earth_science_definition.pdfIn PDF document text
    • https://dorixakogika.weebly.com/uploads/1/3/6/0/136051108/javobisaxupiliwogo.pdfIn PDF document text
    • https://cdn.sqhk.co/lugizumevemu/ghjgjg4/toca_life_after_school_apk_aptoide.pdfIn PDF document text
    • https://cdn.sqhk.co/depadukat/fjftV9d/31702208468.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/gosete/gibebugunujaruligi.pdfIn PDF document text
    • https://s3.amazonaws.com/vuxirefare/wanugasa.pdfIn PDF document text
    • https://s3.amazonaws.com/radubozufiwo/26588200152.pdfIn PDF document text
    • https://s3.amazonaws.com/wotodedaruzuk/99438854045.pdfIn PDF document text
    • https://s3.amazonaws.com/xufujofaleki/arsenal_vs_barcelona_2006_final.pdfIn PDF document text
    • https://s3.amazonaws.com/wanasuvedigo/artie_shaw_clarinet_concerto_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/minegikukovel/bitsat_online_mock_test_free.pdfIn PDF document text
    • https://s3.amazonaws.com/zevutebulaworel/35282225500.pdfIn PDF document text
    • https://s3.amazonaws.com/wixatax/saki_saki_full_video_song_hd.pdfIn 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_off0000e5e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5E8 5768 bytes
SHA-256: 77eff447d21e325b9ac4583b48d9c862bef8b737352729a79207e8a1aae93eb7
font_01_sfnt_off0000f977.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF977 11044 bytes
SHA-256: b5caa87ac06e282ef3b2b404f93f7b9e5d244a4f7475f96d26d2ac6daaaba132

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