Malicious PDF — malware analysis report

Static analysis result for SHA-256 3991c415024566bf…

MALICIOUS

PDF

71.7 KB Created: 2021-02-16 17:50:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 624e66e521762a4341efd1167e40bbbd SHA-1: 9e11904807f27db145d90128be1fea3381d44e7a SHA-256: 3991c415024566bfdff94330ff7f7ec98c590c4f09010f308d4b22e6f29e6c60
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/wix?keyword=smoke+hollow+model+26142e+manual In PDF document text
    • http://dutov.org/abraham_maslow_self_actualizationur54k.pdfIn PDF document text
    • http://salonly.xyz/driven_2018_parents_guidezb0x5.pdfIn PDF document text
    • http://justamorem.com/sigozjcoq7.pdfIn PDF document text
    • http://naturebiolog.fun/grand_theft_auto_4_apk_aptoideoetd9.pdfIn PDF document text
    • http://feedbacrnz.space/internet_manager_keygen_generatorsrc2w.pdfIn PDF document text
    • http://myfirstsite.xyz/96843167530k0qnm.pdfIn PDF document text
    • https://cdn.sqhk.co/xavonepez/3Wr22xp/wogizaf.pdfIn PDF document text
    • https://mejotozoferu.weebly.com/uploads/1/3/4/8/134866749/5a86c43f3ecd.pdfIn PDF document text
    • http://autobuff.xyz/3607823742kwx1p.pdfIn PDF document text
    • http://paganel.world/constant_velocity_review_sheet_answersxa1co.pdfIn PDF document text
    • http://instup.xyz/44720377249k79bq.pdfIn PDF document text
    • https://kidamevu.weebly.com/uploads/1/3/1/4/131437276/xejedodupuradot.pdfIn PDF document text
    • https://cdn.sqhk.co/vasozaponem/aKNUD6v/ultimate_zombie_shooter_hero_world_zombies_warhammer.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://guvedizimokid.rf.gd/gerund_nouns_worksheet.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_off0000d81f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD81F 5476 bytes
SHA-256: c74462fbb2c1a558511e73b0456b10487cde0d7c42f98e891173b2212d88124e
font_01_sfnt_off0000eab7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAB7 11120 bytes
SHA-256: 947a1abffc478ea416c27c8fa419bf0fa6458c4f5a256bf281d7583d434db744