Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0ad23fab3a25dd9…

MALICIOUS

PDF

82.4 KB Created: 2021-03-18 01:56:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 7c4627dbd6c7ff2d42c413ba72508d16 SHA-1: 0ba7160fd555d81593406f60027269c3bdd4aa2d SHA-256: c0ad23fab3a25dd9595749feca77677a4c4c379d0f32246ac5822a5171b1ad5f
126 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with a primary focus on a link related to job pay, suggesting a phishing or scam lure. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of numerous disposable hosting links and UTM parameters further supports a campaign designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://xezojetit.ru/strik?utm_term=how+much+does+dollar+tree+pay+in+florida PDF link annotation
    • https://cdn.sqhk.co/wobimore/bmhdvsc/9616823742.pdfIn PDF document text
    • https://cdn.sqhk.co/vefutifeves/jfojbge/14858214460.pdfIn PDF document text
    • https://cdn.sqhk.co/maduzonuxoke/fTphdgd/tropical_forest_match_3_story.pdfIn PDF document text
    • https://cdn.sqhk.co/tewokozogop/N7ibgc6/57604376256.pdfIn PDF document text
    • https://cdn.sqhk.co/gotuxixovumu/vjjhamE/guidelines_for_covid.pdfIn PDF document text
    • https://cdn.sqhk.co/luwesefizi/s5iiaD6/nda_exam_paper_2018_download.pdfIn PDF document text
    • https://cdn.sqhk.co/rebamomidaw/JjbNiCB/my_talking_tom_2_max_level.pdfIn PDF document text
    • https://cdn.sqhk.co/zudilubal/hbhghac/insta_story_art_maker_for_instagram_storychics.pdfIn PDF document text
    • https://cdn.sqhk.co/vikoparif/hcvghhe/smart_uae_wallet_app.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://figofubinodafe.rf.gd/what_is_psychoanalytic_dream_theory.pdfIn PDF document text
    • http://memajale.epizy.com/mdpi_sustainability_template.pdfIn PDF document text
    • https://s3.amazonaws.com/bewibiwat/dofit.pdfIn PDF document text
    • http://lipunigofajeza.epizy.com/4747166941.pdfIn PDF document text
    • http://zefuxaninegug.epizy.com/69286532775.pdfIn PDF document text
    • https://s3.amazonaws.com/zemigiduwagafu/biporubefikukijimonufo.pdfIn PDF document text
    • https://s3.amazonaws.com/patilawasu/amadeus_reservation_system_guide.pdfIn PDF document text
    • http://gebuzabode.epizy.com/ge_4_device_universal_samsung_replacement_remote_control.pdfIn PDF document text
    • http://rixefixefasi.rf.gd/58938414993.pdfIn PDF document text
    • http://norilonabu.epizy.com/fallout_4_mod_load_order_guide_pc.pdfIn PDF document text
    • http://mojuwuf.epizy.com/59841787115.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_off0000fe7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE7A 5552 bytes
SHA-256: b70eb552167dfd74df647e1f8e3de9080cdb4d66fe02cf3c4e5daa0fbf50bf4a
font_01_sfnt_off00011146.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11146 12556 bytes
SHA-256: 1676609a0f98abe47c73f289407e67b4e7d32c2256ae6fcd9edf6c5e3897e4b0

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