Malicious PDF — malware analysis report

Static analysis result for SHA-256 92dc2f49f38d2854…

MALICIOUS

PDF

76.6 KB Created: 2021-02-03 21:51:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: d0b8fdc14547b69aebdf49cb40ff7b8a SHA-1: 199d8279403f55817cb19ff9b18a9c688f07a047 SHA-256: 92dc2f49f38d28545b8738fa6cb8a8e31de622c5d9d33448b4d1b95284c04f19
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://yafferge.ru/123?utm_term=shrek+is+love+shrek+is+life+2+copypasta'. This URL is likely used to redirect the user to a phishing page or to download a secondary payload. The ML classifier also strongly flagged this PDF as malicious, supporting the phishing or malware distribution intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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.
  • 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/123?utm_term=shrek+is+love+shrek+is+life+2+copypasta In PDF document text
    • http://biomanuawebsiteua.xyz/sujet_brevet_des_collges_2020ss83k.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409628/normal_5fefbd91d29b1.pdfIn PDF document text
    • http://bigpleasure.ru/babys_day_out_full_movie_in_englisotlz.pdfIn PDF document text
    • http://idealslimitaly-ufficiale.site/kinoriroxanoneropikjy0rc.pdfIn PDF document text
    • http://mabay.fun/census_2020_maharashtra6x9qg.pdfIn PDF document text
    • https://cdn.sqhk.co/difanemifal/eRIhjZ5/us_advertising_facts.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406785/normal_5fe9563d9f30c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471960/normal_5ff2d551139cc.pdfIn PDF document text
    • https://cdn.sqhk.co/pefibovip/hibhchd/16634197549.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417206/normal_5fde7f530c632.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413228/normal_5ff9e7b10b5bb.pdfIn PDF document text
    • https://cdn.sqhk.co/xovatagemi/Sgjhhie/risewateriwoxolapeger.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501484/normal_6003fd32d10c3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381539/normal_5ffdc52cd9343.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/zagubip/15735260692.pdfIn PDF document text
    • https://s3.amazonaws.com/wokesabisevo/aeroplane_games_free_for_android.pdfIn PDF document text
    • https://s3.amazonaws.com/pidufozu/gadimoramawanerenanon.pdfIn PDF document text
    • https://s3.amazonaws.com/sajezife/chiari_malformation_type_1_specialists.pdfIn PDF document text
    • https://s3.amazonaws.com/nezanurugega/shadowrun_character_sheet_generator.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_off0000eb78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB78 5564 bytes
SHA-256: 41da76dc3c902f498b456b2fe1b2933df46a79d0352635358f1df32ecd1110fe
font_01_sfnt_off0000fe6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE6F 11944 bytes
SHA-256: 06deab0146144975b6437e1f2b33167ce0ec1864bd16153877e6256b5fbbc857

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