Malicious PDF — malware analysis report

Static analysis result for SHA-256 d45ee56e7ad05e14…

MALICIOUS

PDF

77.0 KB Created: 2021-02-28 06:19:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 3a4bd4d06576c63838a6d750b6f16983 SHA-1: 996e13860ce5147e2f7897c801230972d6b72290 SHA-256: d45ee56e7ad05e143bd69bddadca44dcee6d7b6e162626025f86719929f21245
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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
  • 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.
  • 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://soxebez.ru/aws?utm_term=in+cold+blood+truman+capote+analysis PDF link annotation
    • https://cdn.sqhk.co/nizekidido/jha8ijg/adidas_face_mask_for_sale_south_africa.pdfIn PDF document text
    • https://migikinuxufik.weebly.com/uploads/1/3/4/6/134608510/7a8d867.pdfIn PDF document text
    • http://pofuxubilet.sportsontheweb.net/second_grade_spelling_worksheets.pdfIn PDF document text
    • https://cdn.sqhk.co/rozopebak/ojagfig/81097525954.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450507/normal_5fe3d9c725b9e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412388/normal_5fc7b66247207.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367283/normal_5fda1ca5acc92.pdfIn PDF document text
    • https://cdn.sqhk.co/zaviresodew/gda4jaV/rare_blood_type_pregnancy_shot.pdfIn PDF document text
    • https://cdn.sqhk.co/baluwofuk/igSrrjb/mobojozutowoganazisat.pdfIn PDF document text
    • https://cdn.sqhk.co/verexumifo/c4UZhdu/terraforming_mars_project_deck.pdfIn PDF document text
    • https://cdn.sqhk.co/pafevola/Hieowjj/shadow_fight_3_pc_gameplay.pdfIn PDF document text
    • http://xoziduso.mypressonline.com/safety_in_everyday_life.pdfIn PDF document text
    • https://cdn.sqhk.co/mezutorixo/4jiAXif/84560520163.pdfIn PDF document text
    • https://sutukedepebovi.weebly.com/uploads/1/3/4/7/134753024/7446910.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/vavebufevodutob/89547032203.pdfIn PDF document text
    • https://s3.amazonaws.com/liluvad/helping_verbs_worksheet_with_answer_key.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e4c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4C2 3584 bytes
SHA-256: 82ea7671ae4c25206399f3d73488bd371e1a775449fe85bac60347f7bdda56db
font_01_sfnt_off0000f18e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF18E 5400 bytes
SHA-256: c35ceed5883bb595b26393b5bd7fc31ab67d20ae46a603a3bf16bc51f36b9f74
font_02_sfnt_off000103ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103CE 10220 bytes
SHA-256: 3b72b2df3e944172d60d11e5a76c23caaf02035a814345d2ceb4bcb9a3bd071d

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