Malicious PDF — malware analysis report

Static analysis result for SHA-256 cdda146124081f7f…

MALICIOUS

PDF

82.2 KB Created: 2021-05-03 08:58:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: e40028854603a99cbc79a67223cd5cc9 SHA-1: c4a4053e22a82a67b66470d7f7d08f4aeb2f06ba SHA-256: cdda146124081f7f71dff6fef96160cc010e9cf883c097624cd3023b472e9ec7
126 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, many of which are hosted on disposable domains and appear to be part of a link farm, suggesting a phishing or malware distribution campaign. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or delivering a secondary payload. No scripts were extracted, but the presence of many external URIs points to a redirection or download attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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://kuzutuzo.ru/strik?utm_term=hp+deskjet+2620+wireless+printing PDF link annotation
    • https://cdn.sqhk.co/judawube/krdjcPV/7083_heron_circle_carlsbad_ca.pdfIn PDF document text
    • http://letaraluzim.scienceontheweb.net/application_for_australian_passport_form.pdfIn PDF document text
    • https://cdn.sqhk.co/labifikup/hghjgfX/goat_simulator_goatz_apk_data.pdfIn PDF document text
    • http://verification-help.com/41863738961oz7zc.pdfIn PDF document text
    • http://dakekunagefasak.sportsontheweb.net/xetewumajanawudeji.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416128/normal_60544b9d4ef76.pdfIn PDF document text
    • https://moluxoket.weebly.com/uploads/1/3/2/6/132682852/gerareforoletowemevu.pdfIn PDF document text
    • http://vashe-zdorovie.xyz/vidmate_purana_karne_walaitsw4.pdfIn PDF document text
    • https://cdn.sqhk.co/vakanaju/ojhjije/sodium_phosphate_dibasic_dihydrate_solubility_in_water.pdfIn PDF document text
    • http://affilateapp.online/jejugirarutiacnrs.pdfIn PDF document text
    • http://babbieshop.ru/cengel_heat_transfer_solutiondylah.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385020/normal_601ca1ce5eecb.pdfIn PDF document text
    • https://cdn.sqhk.co/vaxarogajib/ggnMhgV/world_war_brothers_ww2_fps_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/letarezetap/CDWhbqq/bamogapewinifusofenarilog.pdfIn PDF document text
    • http://repaircreditscore.info/social_psychology_research_topicsbxh8s.pdfIn PDF document text
    • https://pesiwuveso.weebly.com/uploads/1/3/5/3/135392822/puxesaku.pdfIn PDF document text
    • http://luminar3-download.xyz/all_souls_trilogy_book_3_endingdv0wb.pdfIn PDF document text
    • http://dodemul.mygamesonline.org/77605579549.pdfIn PDF document text
    • http://just-gopro.com/kewegebiwoxukab6d743.pdfIn PDF document text
    • https://zigetavut.weebly.com/uploads/1/3/0/8/130814179/122336.pdfIn PDF document text
    • http://interbank.link/how_to_find_like_terms_in_algebraic_expressionsumlkg.pdfIn PDF document text
    • http://tanubujurutemut.scienceontheweb.net/mathematics_games_and_puzzles.pdfIn PDF document text
    • https://pesuwoleze.weebly.com/uploads/1/3/5/2/135295903/kisagamuxabedup-kusupa-pomuvesoriwija.pdfIn PDF document text
    • http://jixewelo.scienceontheweb.net/social_media_platforms.pdfIn PDF document text
    • http://fontawesome.iohttp://fontawesome.io/license/In 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://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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eeb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEB7 1684 bytes
SHA-256: a8640cb23b15ac802f89dd0648c07b7ad030d8b62c5f78624c3814794ace58c4
font_01_sfnt_off0000f71b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF71B 5216 bytes
SHA-256: 069f5f6d5ce0e3415f17c2cb4782766d25c611cb0f7df7c4b8daad204a0b7bdd
font_02_sfnt_off00010901.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10901 10272 bytes
SHA-256: a9daf109eb08b50a851894d9deee8a519185a52c1f67d2b51f95617c23f806b1
font_03_sfnt_off00012c46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C46 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361