Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e7556cf146fc6ba…

MALICIOUS

PDF

75.5 KB Created: 2021-03-22 14:41:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: b6a75aba47c91b4b0d904ce4f634eed0 SHA-1: 7c2200822cc53dfa97cd2dd5cacf159cc26b5953 SHA-256: 6e7556cf146fc6bae96a8960def9968316fc1941a42f2662010b78121d4b0f2e
186 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains a large number of external links, indicating a link farm or phishing attempt. The presence of embedded URLs and the overall structure suggest it is designed to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • 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.
  • 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://fokemale.ru/123?utm_term=worksheets+numbers+1-+20+flashcards PDF link annotation
    • https://vosilidasum.weebly.com/uploads/1/3/2/7/132740263/kapogo.pdfIn PDF document text
    • https://subegudikowezi.weebly.com/uploads/1/3/4/4/134476363/5540177.pdfIn PDF document text
    • https://cdn.sqhk.co/pigujoxexate/F7mIYjf/top_90s_rock_songs_playlist.pdfIn PDF document text
    • https://jevezorubik.weebly.com/uploads/1/3/4/8/134864628/sotaxedezexile.pdfIn PDF document text
    • https://cdn.sqhk.co/xudevekelefe/jbIhe1g/pijesum.pdfIn PDF document text
    • https://falaxejuwutop.weebly.com/uploads/1/3/2/6/132681153/nolefifisotu.pdfIn PDF document text
    • https://kenigoxiwe.weebly.com/uploads/1/3/0/9/130970014/siraxamuwod-woput-vimiribudatel-simipidudatowo.pdfIn PDF document text
    • https://cdn.sqhk.co/jabosuve/igeelfR/fuduvek.pdfIn PDF document text
    • https://cdn.sqhk.co/seseniluvus/jqR7ggK/crunchyroll_premium_not_working_2020.pdfIn PDF document text
    • https://tinutenuku.weebly.com/uploads/1/3/4/6/134664278/1374137.pdfIn PDF document text
    • https://dununatanag.weebly.com/uploads/1/3/0/7/130775655/taredusobutivemuxaru.pdfIn PDF document text
    • https://cdn.sqhk.co/jawefujivi/xidhbja/crowd_sounds_during_nfl_games.pdfIn PDF document text
    • https://luzonenof.weebly.com/uploads/1/3/4/5/134509067/42da3d88.pdfIn PDF document text
    • https://cdn.sqhk.co/lebudawojafi/hjhb2ij/antimonial_pentavalente.pdfIn PDF document text
    • https://cdn.sqhk.co/fapulatonupe/aiejjL3/tik_tok_whatsapp_status_video_download_mp4_tamil.pdfIn PDF document text
    • https://cdn.sqhk.co/rebiguta/jjbgck5/68032211744.pdfIn PDF document text
    • https://lugilalosu.weebly.com/uploads/1/3/4/3/134314137/ff7e806e6f0.pdfIn PDF document text
    • https://zevuvizaxetu.weebly.com/uploads/1/3/4/8/134887967/36212165c0.pdfIn PDF document text
    • https://cdn.sqhk.co/jafipago/gejbCid/84859582383.pdfIn PDF document text
    • https://cdn.sqhk.co/jaxugaveg/haVhZRE/xozupebivitop.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dejanubotikepiw.rf.gd/16349993590.pdfIn PDF document text
    • http://nenowunadiwem.epizy.com/computer_brochure_design_vector_free.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_off0000e9bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9BB 5836 bytes
SHA-256: 7ed3fb097609ae73e3811dbd75eb70796679361150d81b29f3faad0563ef3b5f
font_01_sfnt_off0000fd8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD8B 10308 bytes
SHA-256: a3667cc61b7e7d7dcf66a7c375ae996935d1f6e7bc5f47b71da093e46d1cde66

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