Malicious PDF — malware analysis report

Static analysis result for SHA-256 b3563ce2538b7322…

MALICIOUS

PDF

69.5 KB Created: 2021-02-22 01:14:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: d7057c20aa4ab1aeb9ea0e2d9098c6aa SHA-1: 2582541e0851f25869176e377e3ad0c6cb615ab9 SHA-256: b3563ce2538b732207f6be3138d8a4048ff069e1689005e9e05021178dd3d2a7
126 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with one specifically identified as a link farm designed to redirect users. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded links suggest it's designed to trick users into navigating to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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 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://baarspo.ru/strik?utm_term=dish+tv+channel+list+pdf+file PDF link annotation
    • http://metryck.info/110199547745vyyi.pdfIn PDF document text
    • http://vinnipoh.space/remember_me_coco_guitar_sheet_music5zd9m.pdfIn PDF document text
    • http://edayafar.xyz/toefl_grammar_bookv40gh.pdfIn PDF document text
    • http://towumodoxilokox.22web.org/kipimivetunitag.pdfIn PDF document text
    • https://cdn.sqhk.co/mawejoxejobe/dmD9Zjj/truth_or_dare_netflix_2017_actors.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448542/normal_5fe9e1ce719d1.pdfIn PDF document text
    • http://retesopi.iblogger.org/canon_mx880_ink_cartridges.pdfIn PDF document text
    • https://cdn.sqhk.co/jimumakevaji/iKggEKV/wadovumitubi.pdfIn PDF document text
    • http://lnstagram-helping.live/allshare_cast_dongle_app_for_androidku3iw.pdfIn PDF document text
    • http://theharaka.online/walmart_photo_prints_couponmphhg.pdfIn PDF document text
    • https://cdn.sqhk.co/bebubofawa/jj7Mxgj/53641642154.pdfIn PDF document text
    • https://cdn.sqhk.co/movumatoz/XgjWQjd/cosmo_36_questions.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/dobikasukavu/revenue_land_reforms_department_bihar.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_off0000d37f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD37F 5204 bytes
SHA-256: 3a18bfff9f81db64dd81e0ee03f11923d9d3ad3e4cb03e8ac7fae264ed4a3147
font_01_sfnt_off0000e548.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE548 10496 bytes
SHA-256: ead27515d1f9db342cadab0ce3f6402882aa30a4383d4e054dc264dde908a898

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