Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7cc6cb3d3f49355…

MALICIOUS

PDF

76.4 KB Created: 2021-02-26 11:38:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 6a41cefdf68b74a8f65b87888e18e140 SHA-1: ab8d943d6cb1dc845e1ade05e620e9040aadcb98 SHA-256: c7cc6cb3d3f49355fa5a0bce1b039f5bd7985ad2115077b6d5570c8517c91a7d
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • 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://jumiwimov.ru/wix?keyword=field+guide+to+western+reptiles+and+amphibians PDF link annotation
    • http://wobepatonogez.iblogger.org/47252698481.pdfIn PDF document text
    • https://cdn.sqhk.co/zivuronufepu/gZjfsJ8/pinoy_logo_quiz_level_72.pdfIn PDF document text
    • http://rifimakegezibor.22web.org/48167115137.pdfIn PDF document text
    • http://rutevelafi.iblogger.org/wewepavadoguvoxuxa.pdfIn PDF document text
    • http://peroruse.iblogger.org/46348173822.pdfIn PDF document text
    • http://gifozazupu.iblogger.org/comic_book_template_ppt.pdfIn PDF document text
    • https://cdn.sqhk.co/xumesapaxoku/geLTifB/battleheart_legacy_best_classes.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fafovinipola.epizy.com/boom_boom_momoland_lyrics.pdfIn PDF document text
    • http://leranijaw.rf.gd/bluetooth_for_windows_10_driver_free.pdfIn PDF document text
    • http://podixevobelataw.rf.gd/lg_top_load_washing_machine_showing_pe_error.pdfIn PDF document text
    • http://terajupatasan.rf.gd/1133458814.pdfIn PDF document text
    • http://modunatotuw.epizy.com/percentage_increase_decrease_word_problems_worksheet.pdfIn PDF document text
    • http://gabamad.epizy.com/belajar_rumus_vlookup_dan_hlookup.pdfIn PDF document text
    • http://tiwisuk.epizy.com/searchview_in_recyclerview_android_example.pdfIn PDF document text
    • http://lojixebaxademim.epizy.com/audio_video_converter_for_android_apk.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_off0000edd4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDD4 5560 bytes
SHA-256: ac325a4df5c6cee8a01add57d9295e57176bfca9c5ffa96e29d138f113636e05
font_01_sfnt_off000100a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100A0 10504 bytes
SHA-256: 68c3ce2dec87de7a5f3ba75293a37775175ceae785f98c9a87b7e4d9490a94a0

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