Malicious PDF — malware analysis report

Static analysis result for SHA-256 20456b00b61b2ca1…

MALICIOUS

PDF

80.7 KB Created: 2021-04-05 17:45:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: b74f9d4c74135b3b0fddd4e98bf05e5b SHA-1: b2470d37d6f6b68e936eb91d71f78b2f82faf711 SHA-256: 20456b00b61b2ca143e3e6f17e4e25ecf5346dec4b05496ed0a6bcd24b4b5a8a
126 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs, many pointing to disposable domains, and is flagged as a link farm. While no scripts were explicitly extracted, the PDF structure and embedded links suggest it's designed to redirect users to potentially malicious sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://cdn-cms.f-static.net/uploads/4371497/normal_604634180e1e3.pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4500429/normal_606001e699bee.pdfIn PDF document text
    • http://larokamexi.sportsontheweb.net/59269606060.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474998/normal_60114a6776b1e.pdfIn PDF document text
    • http://vetejula.mypressonline.com/pozepuwinatuperesifi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4458428/normal_5fe01f484c59a.pdfIn PDF document text
    • https://cdn.sqhk.co/kikolibub/GFijYhd/79195634531.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416930/normal_6024247863ae2.pdfIn PDF document text
    • http://korixoludofuguk.scienceontheweb.net/nda_biology_questions.pdfIn PDF document text
    • https://cdn.sqhk.co/xogixute/digL2jb/prayers_of_thanks_to_god.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416151/normal_5fd652497f6e6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378613/normal_6056c3466ea8d.pdfIn PDF document text
    • https://cdn.sqhk.co/vosiwuli/gihegge/33621053797.pdfIn PDF document text
    • https://cdn.sqhk.co/juxajomuz/gdiaVMI/step_ladder_jokes.pdfIn PDF document text
    • https://cdn.sqhk.co/bizujutenifo/BgfhNhj/download_game_mod_ball_brick_breaker.pdfIn PDF document text
    • http://wutanumijejol.sportsontheweb.net/xajuburex.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://feedproxy.google.com/~r/wb/ENAH/~3/kMuynZNWtA0/wb?keyword=diagrama%20de%20flujo%20significado%20de%20simbolosPDF link annotation
    • https://s3.amazonaws.com/farezelof/95699649860.pdfIn PDF document text
    • http://woranuganavot.myartsonline.com/what_is_knowledge_to_action_framework.pdfIn PDF document text
    • http://kapirexazi.onlinewebshop.net/rock_band_4_drum_pedal_xbox_one.pdfIn PDF document text
    • https://s3.amazonaws.com/xopugup/kanelogekewapiwas.pdfIn PDF document text
    • https://s3.amazonaws.com/nefomojuwet/72219141919.pdfIn PDF document text
    • https://s3.amazonaws.com/zerejibixupav/what_is_narrow_definition_of_curriculum.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e5ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5EA 5556 bytes
SHA-256: 16b41e6053838618301a01adcf6487b9d2329ddd983dd1c24f50fb905e98d11b
font_01_sfnt_off0000f8ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8CA 11312 bytes
SHA-256: 2c0f29e7111c89b44a15fd61c88f78bf9fe824d4049038175e909d40f4b099dc
font_02_sfnt_off00011ddb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DDB 16204 bytes
SHA-256: c988415812f594187b0a0ed75dc52802e798e1695b49bd300f8412a65040a449

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