Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ce6c6887964b545…

MALICIOUS

PDF

77.0 KB Created: 2021-03-29 22:56:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: e91f0699e95609dd53831a79e265efaf SHA-1: 9b218af9b5ff1459b323c70660ba810af263d8a3 SHA-256: 8ce6c6887964b545b0d66686c5a1ad22a83e81672c50731f3e881a507457fbef
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 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://zajinet.ru/aws?utm_term=mini+bernese+mountain+dog+puppies+for+sale+near+me PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4463825/normal_5fd64c0e7c8f1.pdfIn PDF document text
    • https://cdn.sqhk.co/guzowozuk/jgj3gii/54130353404.pdfIn PDF document text
    • http://gunurovidoz.iblogger.org/anki_like_app_for_android.pdfIn PDF document text
    • https://cdn.sqhk.co/girewobo/hje1hgu/78234578691.pdfIn PDF document text
    • https://cdn.sqhk.co/luwesefizi/myAijKX/fatesonadaza.pdfIn PDF document text
    • https://cdn.sqhk.co/fesoxuleri/jpeiii8/sling_blade_movie_meaning.pdfIn PDF document text
    • http://italiahot.fun/craigslist_maine_for_sale_antiquesk55va.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501777/normal_5ff781497b76a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476133/normal_6034c03b9b981.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375358/normal_600687162c178.pdfIn PDF document text
    • https://cdn.sqhk.co/nizivatitogu/iViejgX/xuboto.pdfIn PDF document text
    • https://cdn.sqhk.co/sikudile/jjgjhb8/vetejiboziwatofijolu.pdfIn PDF document text
    • http://com-connexion.xyz/how_to_screenshot_on_iphone_6_s_pluszby3s.pdfIn PDF document text
    • https://cdn.sqhk.co/mogizufofuj/bnhjgfc/open_puzzle_box_level_28.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444647/normal_6043ec6f40197.pdfIn PDF document text
    • https://cdn.sqhk.co/vunebegawiwa/Xcicljj/26062186226.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/fejenijovekozu/animal_crossing_hair_color_guide_new_leaf.pdfIn PDF document text
    • http://lugirike.epizy.com/battery_booster_full.pdfIn PDF document text
    • https://s3.amazonaws.com/pobixedele/jabusowewokitu.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_off0000eea5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEA5 5508 bytes
SHA-256: 455630f5107004de54283703859319aa606c9b0f99c28b4537b0130e6fceb45e
font_01_sfnt_off00010148.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10148 11012 bytes
SHA-256: 16eebc785f029b4d102b6c9211788e415e79341a1b4ab77491eea8bd9acdad08