Malicious PDF — malware analysis report

Static analysis result for SHA-256 04527f15ef904ad8…

MALICIOUS

PDF

91.3 KB Created: 2021-02-25 08:14:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 8d24100a8f5914f9e01441dc707f2bbb SHA-1: 4d8b37ed7125c0aa70782a88f6a62d0791df2b6d SHA-256: 04527f15ef904ad873e952283178d4c263342490dc7fc46ac0a47058eb2bb9e7
126 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9997

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=weber+spirit+classic+e-310+manual PDF link annotation
    • http://kopuvimu.scienceontheweb.net/technical_elements_of_film_production.pdfIn PDF document text
    • https://cdn.sqhk.co/raxuzuvuluf/cqERY3Z/ethiopian_airlines_cargo_plane_catches_fire.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369493/normal_5fe5c221a5d2e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4389816/normal_5fe0cb7115c4b.pdfIn PDF document text
    • https://setuwome.weebly.com/uploads/1/3/0/8/130874340/3869497.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368763/normal_60216e4d1bd9e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375340/normal_603319fcd6c19.pdfIn PDF document text
    • http://xawegap.mywebcommunity.org/how_to_wipe_a_samsung_galaxy_tab_4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407313/normal_6006949be91cc.pdfIn PDF document text
    • https://katesagi.weebly.com/uploads/1/3/4/8/134864962/3676297.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490934/normal_6022e934e9b0b.pdfIn PDF document text
    • https://cdn.sqhk.co/mitukutowum/dTnhboS/pinball_wizard_elton_john_tommy_movie.pdfIn PDF document text
    • https://bunadijora.weebly.com/uploads/1/3/4/4/134432215/bofug.pdfIn PDF document text
    • https://zeleloda.weebly.com/uploads/1/3/0/7/130776222/8292391.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://jabodegodonirad.atwebpages.com/pazugabe.pdfIn PDF document text
    • http://donijexufenu.onlinewebshop.net/verb_forms_v1_v2_v3_v4_v5.pdfIn PDF document text
    • http://tiluxusimutine.atwebpages.com/22917698346.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_off00011656.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11656 5396 bytes
SHA-256: 0054a8479c455c57f4b1ccc1b36d10680eb7bd4e718ffbdc0e4de833767b6e0a
font_01_sfnt_off000128a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128A1 12080 bytes
SHA-256: 33456a6ae8b5d4fb5bc229a31d7ca8d43094da617add6df4e5bac835423186e3
font_02_sfnt_off0001507b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1507B 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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