Malicious PDF — malware analysis report

Static analysis result for SHA-256 e20df901c3f3928b…

MALICIOUS

PDF

71.4 KB Created: 2021-03-17 18:17:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 72036f3ae95cb8ab64edc146d9233274 SHA-1: 521bd40848fd8a8aeaf21465d6a75d149c9175c8 SHA-256: e20df901c3f3928bc7030c5f4844d3814aa3b5137ecda9899a091d0091b31e8e
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many pointing to disposable domains and redirectors, suggesting a link farm or phishing lure. The document body, though heavily obfuscated, appears to be a pretext for these links. The presence of external URIs and the overall structure indicate an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://leonvi.ru/strik?utm_term=how+to+reprogram+prestige+car+alarm+remote PDF link annotation
    • http://faxagigotitij.66ghz.com/swamp_thing_movie_in_tamil.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4493589/normal_6036a1e23cdfd.pdfIn PDF document text
    • https://cdn.sqhk.co/jobubexivex/uQig5Gz/ajooba_movie_300mb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387938/normal_5fde3b72acdbc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4423137/normal_5fcfb4e3c4cbc.pdfIn PDF document text
    • http://neroveruturom.iblogger.org/standard_subject_identification_code_manual_navy.pdfIn PDF document text
    • https://cdn.sqhk.co/wexunaveb/tpBgggh/best_bitcoin_wallet_mobile_app.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446925/normal_601e594ea0b3c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379856/normal_5fca4e26d5868.pdfIn PDF document text
    • https://cdn.sqhk.co/zidexamuwela/7hRjgig/laberemivo.pdfIn PDF document text
    • http://sopisafexuj.sportsontheweb.net/konsep_kurikulum_pendidikan_islam.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416139/normal_5fecc142cfd4c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482648/normal_5fdd881c38829.pdfIn PDF document text
    • http://pofuxubilet.sportsontheweb.net/bowflex_power_pro_leg_workouts.pdfIn PDF document text
    • https://cdn.sqhk.co/sixitigoxeto/cShcbMY/vezizafemosemupenopamabit.pdfIn PDF document text
    • https://cdn.sqhk.co/vujaderaz/cdibNgc/dumotajabotofumesug.pdfIn PDF document text
    • https://cdn.sqhk.co/nuzozuni/KihPjbv/25772943907.pdfIn PDF document text
    • https://cdn.sqhk.co/potiribuwuf/bIRvhjv/monster_warlord_tap_warlord_deutsch.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460063/normal_6020a7c051cd1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pigibotokaper.epizy.com/windows_boot_manager_android_x86.pdfIn PDF document text
    • http://bipedok.epizy.com/71398326263.pdfIn PDF document text
    • http://jifunujori.rf.gd/dawagefuwum.pdfIn PDF document text
    • http://xusapibu.onlinewebshop.net/49588234418.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_off0000da87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA87 5304 bytes
SHA-256: 8e7e13296f8abe4c063c183208f16d6a725a9f540967820a41d8df06b226aecd
font_01_sfnt_off0000ec8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC8D 10432 bytes
SHA-256: 27d87938d1ae03c5fb27a5527138ac75a557d43e8d4df0386fab4eb7f3d36075

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