Malicious PDF — malware analysis report

Static analysis result for SHA-256 0dd3458c126c5d78…

MALICIOUS

PDF

80.6 KB Created: 2021-02-22 22:49:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 3542efbae00252b00d148a0e0783c682 SHA-1: 59caebc5cd3cce216ef3794df470dd4cfe0bf254 SHA-256: 0dd3458c126c5d78576b0949df1de90a835ba4e5e5aad5d95d0628eade252551
156 Risk Score

Malware Insights

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

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://maypoin.ru/123?utm_term=making+money+online+for+free+in+south+africa PDF link annotation
    • https://juladugalevatib.weebly.com/uploads/1/3/4/3/134385664/2302391.pdfIn PDF document text
    • https://cdn.sqhk.co/barugogip/enjePAd/clash_of_clans_hack_coins_elixir_and_gems.pdfIn PDF document text
    • https://cdn.sqhk.co/xiwasazafu/Wjejd1Q/real_bike_racing_2020_real_bike_driving_game.pdfIn PDF document text
    • https://zukaxalu.weebly.com/uploads/1/3/1/4/131406202/fuwulusomip.pdfIn PDF document text
    • https://cdn.sqhk.co/wikelere/lhexhiO/word_jammer_in_english.pdfIn PDF document text
    • https://cdn.sqhk.co/lenawemijixe/ghiiibD/42997849554.pdfIn PDF document text
    • https://cdn.sqhk.co/gulizate/jhheGkO/96358674043.pdfIn PDF document text
    • https://cdn.sqhk.co/puvubuzu/hfxijgd/crossword_clue_summary_8_letters.pdfIn PDF document text
    • https://cdn.sqhk.co/nizivatitogu/sThfhdo/toy_carnival_quest_ragnarok_mobile.pdfIn PDF document text
    • https://cdn.sqhk.co/nimabugokofa/Ihajijg/gizetik.pdfIn PDF document text
    • https://cdn.sqhk.co/gegefemorosu/iajggcS/adderall_doses_xr.pdfIn PDF document text
    • https://subijiderekura.weebly.com/uploads/1/3/4/6/134616270/77a357f06a6c04b.pdfIn PDF document text
    • https://cdn.sqhk.co/sozivowemin/fgiXheS/88697918108.pdfIn PDF document text
    • https://teligodinawam.weebly.com/uploads/1/3/4/4/134457670/2381556.pdfIn PDF document text
    • https://cdn.sqhk.co/sakupiraf/hohhyST/cell_to_singularity_evolution_never_ends_codes.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
    • https://s3.amazonaws.com/jukoxisojow/grade_4_maths_capacity_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/pidufozu/mefekavupesilugabab.pdfIn PDF document text
    • https://s3.amazonaws.com/jevopemosod/do_army_drill_sergeants_get_extra_pay.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_off0000f0c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0C3 5348 bytes
SHA-256: a7c8cf4617c0e39fe4f2a6a4851edb0a82792f166f028e65118a8031bf066f06
font_01_sfnt_off000102d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102D8 10580 bytes
SHA-256: 8d3ddb96cf5765a12a8933a48125c9002f250c7934216561b4c42f1e8bc73a0f
font_02_sfnt_off000126dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126DD 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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