Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f49f2e5a7acc870…

MALICIOUS

PDF

72.6 KB Created: 2021-02-07 12:21:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 6987cb4cbf0d50f5ba429c44df18acff SHA-1: 0e7e3123763fa10e855745c97826f5c478651464 SHA-256: 7f49f2e5a7acc870f73503440305dc5af40c8dd66be5987c7d2eacb44a96d1ae
244 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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.
  • 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=wildwood+convention+center+phone+number In PDF document text
    • https://vagapirub.weebly.com/uploads/1/3/4/6/134648019/cd33bacfc.pdfIn PDF document text
    • https://roparinupiw.weebly.com/uploads/1/3/5/3/135392621/tiwuwituvefogedopu.pdfIn PDF document text
    • https://vuginavoji.weebly.com/uploads/1/3/0/7/130775358/0f8961.pdfIn PDF document text
    • https://cdn.sqhk.co/businaxidare/ntPyhch/plague_inc_board_game_armageddon.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4499021/normal_5feb966631306.pdfIn PDF document text
    • https://jabesukugadipo.weebly.com/uploads/1/3/2/8/132814964/tulenutemomu.pdfIn PDF document text
    • https://cdn.sqhk.co/naforokafe/jhDOWru/advance_auto_parts_warehouse_worker_pay.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417306/normal_5fe3b60a78d43.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416332/normal_60002d7081065.pdfIn PDF document text
    • https://bomutakarekavag.weebly.com/uploads/1/3/5/3/135330682/lewulajakekisuguruj.pdfIn PDF document text
    • https://jodatonibidoxej.weebly.com/uploads/1/3/5/2/135297120/zalenibuvexerinu.pdfIn PDF document text
    • https://bigonokefexix.weebly.com/uploads/1/3/4/5/134518339/4259321.pdfIn PDF document text
    • https://wejumarokurefa.weebly.com/uploads/1/3/0/7/130776247/84b8c4ef759b6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vibesegajepo.epizy.com/49625497107.pdfIn PDF document text
    • http://sojisij.epizy.com/numorijijofavamoganovi.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_off0000e064.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE064 5232 bytes
SHA-256: 208ad2e21973bcf29867f0d6e7a7d80e58670fa7caefabace388266de1070dd5
font_01_sfnt_off0000f21a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF21A 10280 bytes
SHA-256: 8f32128e400ef5f98c767e3439519bcd06d035c8752f6487519d03cdb3a2a733

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