Malicious PDF — malware analysis report

Static analysis result for SHA-256 74065622dbd71e5f…

MALICIOUS

PDF

67.3 KB Created: 2021-04-08 03:16:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: a2f5a5939c24137e16330dafc53c0315 SHA-1: cebffc0ec933896c487f4dc32445f86b95f40507 SHA-256: 74065622dbd71e5f3ade274583835aef0bfc2e6d6e44eb46f1ebc807d3bd17d6
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, with a primary suspicious URL being https://soxebez.ru/wix?keyword=types+of+chemical+bonds+worksheet+doc, suggesting it's used for phishing or malware distribution. The document's structure and heuristic firings point towards it being a link farm designed to redirect users to potentially harmful content.

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://soxebez.ru/wix?keyword=types+of+chemical+bonds+worksheet+doc PDF link annotation
    • https://cdn.sqhk.co/ruzewekafan/dInhiTU/paul_hardcastle_rainforest_90.pdfIn PDF document text
    • https://mejodedasebedo.weebly.com/uploads/1/3/4/7/134725949/2017345.pdfIn PDF document text
    • https://cdn.sqhk.co/kitaparek/ehj4ghF/rujuj.pdfIn PDF document text
    • http://airned.ru/the_pact_by_jodi_picoult_bookz3urm.pdfIn PDF document text
    • https://cdn.sqhk.co/zizaratijiga/jiheEif/fight_night_battle_royale_fps_shooter_download.pdfIn PDF document text
    • http://cardioactiveuficiale.site/67687823749z00fd.pdfIn PDF document text
    • https://juvujifakodokiw.weebly.com/uploads/1/3/4/6/134699996/02a2e948963.pdfIn PDF document text
    • https://xaforegitada.weebly.com/uploads/1/3/1/4/131413040/puluvoda-bijikiwijati-gipalutiwemesej.pdfIn PDF document text
    • https://kexowepapu.weebly.com/uploads/1/3/2/8/132815076/256a0bb.pdfIn PDF document text
    • http://on-arenas.com/what_are_the_three_pillars_of_zengzxms.pdfIn PDF document text
    • https://cdn.sqhk.co/jizapamilizo/bk7yzZ4/vikings_ivar_actor_blue_eyes.pdfIn PDF document text
    • https://cdn.sqhk.co/lodabazul/jiguitf/textaufgaben_brche_6._klasse.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/22523833-e533-4d0b-b72e-c282c0ecf369/black_and_decker_grass_hog_spool_winding.pdfIn PDF document text
    • https://s3.amazonaws.com/dudurat/the_gender_secret_series.pdfIn PDF document text
    • https://s3.amazonaws.com/pazovugal/fujiwonetumomewes.pdfIn PDF document text
    • https://e064a861-6c7b-46af-b67a-66be1f32d776.filesusr.com/ugd/ec3e4b_60992d57a9384b1f9c9bbf8136d47c3b.pdf?index=trueIn PDF document text
    • https://d8aee3b0-83ea-4a0d-b8f9-524a85b41d10.filesusr.com/ugd/105b34_9f2ee8eeafbe44c1b1493e7815f21cfb.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xijuxosisomuna/69562191632.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0d39ea59-f804-4358-b247-f90db69ba164/where_to_donate_furniture_in_regina.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_off0000c7ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7ED 5744 bytes
SHA-256: 56e7ca07819807fa503ee04eb97170d8cd8505682c884c3eb52111fe3b0e6dd6
font_01_sfnt_off0000db5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB5B 10448 bytes
SHA-256: ee88c5a4d26f65e621d6d12ad4ef4e22c6b6aac1258a50c49654cdc771508ada

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