Malicious PDF — malware analysis report

Static analysis result for SHA-256 1bce45fa00d3858c…

MALICIOUS

PDF

70.5 KB Created: 2021-02-19 17:50:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 968485e8ea5de9a8d067491bdc79e684 SHA-1: 1f6e5c885b4cc7040d29737598b573deee033844 SHA-256: 1bce45fa00d3858c0592be0c665f74646c474e58495a014eba2927fed4e9ba3d
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, with one heuristic specifically identifying it as a 'PDF_SEO_LINK_FARM'. The primary external URL, 'https://maypoin.ru/123?utm_term=morning+and+evening+duas+for+protection', is suspicious and likely leads to a phishing or malware distribution site. ClamAV also detected this file as 'Pdf.Phishing.Trojan-d2528dad23a95d95-10044376-0', further indicating malicious intent.

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://maypoin.ru/123?utm_term=morning+and+evening+duas+for+protection PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4380393/normal_5fd8d12f7272c.pdfIn PDF document text
    • https://vazozedirasamib.weebly.com/uploads/1/3/4/0/134013018/9214637.pdfIn PDF document text
    • https://cdn.sqhk.co/wujozuzewed/MhhIUhh/age_of_empires_2_trial_cheats_pc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4463809/normal_5ff266d17d75c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452608/normal_6012213bcc325.pdfIn PDF document text
    • https://wunepilupizuxo.weebly.com/uploads/1/3/1/8/131857535/6221831.pdfIn PDF document text
    • https://ligofaxudatejot.weebly.com/uploads/1/3/0/7/130739538/fujomom.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412380/normal_6029524c929f1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4496580/normal_60059e197500e.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/babuxufarizuxur/fupitekurusagedazot.pdfIn PDF document text
    • https://s3.amazonaws.com/nitajosasa/circle_theorems_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/vuforewebub/camera_b612_selfie_expert_app.pdfIn PDF document text
    • https://s3.amazonaws.com/boxujetanonikuv/razer_blackwidow_tournament_edition_switch_type.pdfIn PDF document text
    • https://s3.amazonaws.com/vefagotoje/contract_dispute_lawyer_near_me.pdfIn PDF document text
    • https://s3.amazonaws.com/sowewazulejewi/22135098392.pdfIn PDF document text
    • https://s3.amazonaws.com/neviwove/free_expenses_claim_form_template_uk.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_off0000d6f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6F7 5356 bytes
SHA-256: b77cf1c5f7cf45411688c860b7149a3bd9af7b48c0e7a187a507dce10eb01014
font_01_sfnt_off0000e95b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE95B 10400 bytes
SHA-256: 445549f768d95ce6e32c9a55a2af2123c90074dc270f4db271ed1cab042cbcce

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