Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5eb4af2787532be…

MALICIOUS

PDF

73.4 KB Created: 2021-06-08 18:43:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-29
MD5: d24a9b2cf357de6cdec5d3e9da33f981 SHA-1: 5530f65579f5395cbefc7bd0c442612efae6b04c SHA-256: e5eb4af2787532be5f9f142539dfffdc6d819d7a4a43d6f649fb030add6d8ec1
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 0.9995

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://crysiq.ru/pbw?utm_term=okami+wii+iso PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4415783/normal_5fdb354676fcc.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4449424/normal_60b05b2697a5c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415534/normal_600ad9e0d192b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421474/normal_6062182c1fed7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wojoxevom.pbworks.com/f/wbpsc_assistant_engineer_electrical_exam_date.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6e898cd2-d155-462f-94f4-0ff852b0ec0c/14441283268.pdfIn PDF document text
    • http://zixawedeg.pbworks.com/f/1997_kawasaki_vulcan_800_owners_manual.pdfIn PDF document text
    • http://tujelupirobe.pbworks.com/f/how_to_reinstall_keyboard_driver_lenovo.pdfIn PDF document text
    • http://dawanitapix.pbworks.com/w/file/fetch/144717738/minecraft_fire_and_ice_mod_dragon_cave.pdfIn PDF document text
    • http://xofitesu.pbworks.com/w/file/fetch/144439518/fafekabogufubimuvik.pdfIn PDF document text
    • http://pusurupufem.pbworks.com/f/pollination_and_fertilization_worksheet_grade_3.pdfIn PDF document text
    • http://jujirafamena.pbworks.com/w/file/fetch/144630231/what_is_the_critical_race_theory_movement.pdfIn PDF document text
    • http://bopelijexuf.pbworks.com/f/7044399318.pdfIn PDF document text
    • http://fevuxowina.pbworks.com/f/insann_anlam_aray_indir.pdfIn PDF document text
    • http://sejuworepow.pbworks.com/f/lady_yelling_at_confused_cat_meme_generator.pdfIn PDF document text
    • http://joxupakager.pbworks.com/w/file/fetch/144855600/6497516289.pdfIn PDF document text
    • http://rixepal.pbworks.com/f/le_royaume_de_kensuk_rsum_chapitre_5.pdfIn PDF document text
    • http://kefimazusob.pbworks.com/f/how_do_i_reset_my_pioneer_bluetooth_headphones.pdfIn PDF document text
    • http://pigedigasexu.pbworks.com/w/file/fetch/144671025/77287806770.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e1bbed89-0a25-47b0-af38-1c9215389e69/driverpack_solution_17.7.4_offline_iso_highly_compressed_rar.pdfIn PDF document text
    • http://sekodegaxex.pbworks.com/w/file/fetch/144598455/before_i_let_you_go_book.pdfIn PDF document text
    • http://jiboduxoguv.pbworks.com/w/file/fetch/144787146/23982751864.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_off0000d2ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2EF 3604 bytes
SHA-256: 932b3c4b783466e74d3a71796dde9d30c4ed0bb1080471164aca176128d4481a
font_01_sfnt_off0000dfd4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFD4 4884 bytes
SHA-256: 5bd925800b463a8bfd68dbf9b08fca35b63bc364912e25695cf9f226582656bd
font_02_sfnt_off0000f077.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF077 12300 bytes
SHA-256: 727f8b6a08f6d5c56a676d60bbc2b4c28f771f822e1c65b5bdf4833644924ef4