Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad7c2a7471813fd6…

MALICIOUS

PDF

77.3 KB Created: 2021-05-31 21:55:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: e17eaecd0343411a0a35a3b78f216621 SHA-1: f34b6305eaac3b7a9bfa078fa36f64e92dfabfa6 SHA-256: ad7c2a7471813fd6035dfbb2612ecbce3c54194a7d2db03e225f8154686f94c1
226 Risk Score

Malware Insights

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

This PDF file contains numerous external links, many pointing to disposable hosting services, suggesting a link farm designed to distribute malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The document's structure and embedded links are consistent with a phishing lure, aiming to trick users into downloading further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

Heuristics 7

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://irlanc.ru/pbw?utm_term=grand+theft+auto+san+andreas+psp+iso+file PDF link annotation
    • https://vebupixe.weebly.com/uploads/1/3/4/8/134854050/6096d8f334605.pdfIn PDF document text
    • https://duzejuwilana.weebly.com/uploads/1/3/4/8/134879611/86f9695.pdfIn PDF document text
    • https://jokilexagazoxo.weebly.com/uploads/1/3/4/6/134602179/ruvirakorupedon-buxofexufa-bikes-mifeveg.pdfIn PDF document text
    • https://vajemedodumuni.weebly.com/uploads/1/3/4/3/134351385/rezuwitu-tubij-xudedubosoku-nedadaf.pdfIn PDF document text
    • https://todijaxazifaro.weebly.com/uploads/1/3/4/3/134342800/2146801.pdfIn PDF document text
    • https://wofofubuw.weebly.com/uploads/1/3/2/7/132710679/fibewigafutalu.pdfIn PDF document text
    • https://xogosafaxisomig.weebly.com/uploads/1/3/0/7/130739024/540c85a.pdfIn PDF document text
    • https://feverawujebuv.weebly.com/uploads/1/3/5/3/135314909/a24393.pdfIn PDF document text
    • https://lekakuvikel.weebly.com/uploads/1/3/1/3/131380005/1607885.pdfIn PDF document text
    • https://rebumazezip.weebly.com/uploads/1/3/4/8/134860465/xuvilozivezi-duvometuvi-rubukamunak.pdfIn PDF document text
    • https://nokiziwevapof.weebly.com/uploads/1/3/4/5/134507241/3525085.pdfIn PDF document text
    • https://naputurezakir.weebly.com/uploads/1/3/4/4/134485320/javom.pdfIn PDF document text
    • https://mekivigabu.weebly.com/uploads/1/3/4/0/134096936/e3c95cc87762a3.pdfIn PDF document text
    • https://tigubitutonoxib.weebly.com/uploads/1/3/4/4/134476812/5940176.pdfIn PDF document text
    • https://lotetirupaxep.weebly.com/uploads/1/3/4/0/134013035/f58ec1c0166f424.pdfIn PDF document text
    • https://metozalolak.weebly.com/uploads/1/3/4/6/134610510/8800161.pdfIn PDF document text
    • https://zokejiwiperasuk.weebly.com/uploads/1/3/4/6/134668939/617f438e617.pdfIn PDF document text
    • https://fezuwujazu.weebly.com/uploads/1/3/5/3/135347069/darevujek.pdfIn PDF document text
    • https://zevenaxef.weebly.com/uploads/1/3/4/7/134745307/sulenu-nafikowebubejeb-babaniju.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bupataved.pbworks.com/f/free_gem_generator_for_clash_of_clans_no_survey.pdfIn PDF document text
    • http://tebejeloxid.pbworks.com/f/how_to_treat_a_sick_green_cheek_conure.pdfIn PDF document text
    • http://dekokos.pbworks.com/w/file/fetch/144416640/download_ets2_bus_simulator_indonesia_android.pdfIn PDF document text
    • http://kufujibumufa.pbworks.com/w/file/fetch/144412389/urban_planning_books_free_download.pdfIn PDF document text
    • http://bekivuxuga.pbworks.com/f/watch_free_full_movies_no_sign_up.pdfIn PDF document text
    • http://lijegazoz.pbworks.com/w/file/fetch/144415695/how_to_gain_weight_in_a_week.pdfIn PDF document text
    • http://wuxikadafi.pbworks.com/w/file/fetch/144416898/what_does_widal_test_positive_mean.pdfIn PDF document text
    • http://neruwuk.pbworks.com/f/jemexew.pdfIn PDF document text
    • http://zepadatoju.pbworks.com/f/grade_6_english_grammar_worksheets_with_answers.pdfIn PDF document text
    • http://bovojigu.pbworks.com/w/file/fetch/144424677/69586489030.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_off0000efb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFB6 5160 bytes
SHA-256: be9ed30ae5c7c74cc180658d44e95ded24b9708b6ec9203e9d29f010ac9f6e4b
font_01_sfnt_off00010143.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10143 11088 bytes
SHA-256: ba61b009f434d129b531e0e2bfe05abb6aa89bcbf20365d72d34c17f6f4044d2

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