Malicious PDF — malware analysis report

Static analysis result for SHA-256 139452279be28ce9…

MALICIOUS

PDF

68.2 KB Created: 2021-01-28 09:47:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-01
MD5: 90b41c94f6b9c470dce9d4ca45e7b41a SHA-1: 619f02eb344ad21b777a92b91fa555e6be74547a SHA-256: 139452279be28ce9bec25be4fbd2c810b6febe062406e02d3c21c9bf7fc02b6c
244 Risk Score

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
  • 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=bolich+middle+school+lunch+menu In PDF document text
    • http://helplnstagramcontact6088758.com/tower_defense_simulator_roblox_live_eventhg9e2.pdfIn PDF document text
    • http://healthit.space/212827993514me70.pdfIn PDF document text
    • https://zopoxetofosifa.weebly.com/uploads/1/3/4/8/134863155/jonidusagikapinapes.pdfIn PDF document text
    • https://vukajikabazaxeg.weebly.com/uploads/1/3/4/7/134711597/52fbd772e79d876.pdfIn PDF document text
    • https://wapapoda.weebly.com/uploads/1/3/4/5/134581042/66cfcd12090.pdfIn PDF document text
    • https://munulokepopat.weebly.com/uploads/1/3/5/2/135297381/d1d999aa3.pdfIn PDF document text
    • https://cdn.sqhk.co/bitenutugiw/FlM3Jhe/roblox._studio_get_free_robux.pdfIn PDF document text
    • https://cdn.sqhk.co/vomawoko/RhjjhC6/eventide_slavic_fable_free_download.pdfIn PDF document text
    • http://homiak.fun/lemenevetofaxowuxhrwiy.pdfIn PDF document text
    • http://autocredit.moscow/cdc_yellow_book_malaria_by_countryt78hw.pdfIn PDF document text
    • http://giveaway2020.info/47014386180oecwo.pdfIn PDF document text
    • https://muxolebutelun.weebly.com/uploads/1/3/2/7/132741382/besodogewened_bizurap.pdfIn PDF document text
    • https://cdn.sqhk.co/lexijunibul/cGALxja/81172153901.pdfIn PDF document text
    • https://ribiridoxa.weebly.com/uploads/1/3/0/8/130874248/vusipipi.pdfIn PDF document text
    • http://helpcenter.business/wukupexwypcs.pdfIn PDF document text
    • http://instup.xyz/820790361472i7p1.pdfIn PDF document text
    • http://whitetwo.space/crazy_games_zombs_royalee5tev.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/kovezodepugov/29142754590.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_off0000ce29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE29 4924 bytes
SHA-256: ae661399e0e1446b101477d75fd85e9e201dacfd416767186924f88321d6a0ab
font_01_sfnt_off0000dec1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEC1 10844 bytes
SHA-256: 83c6be672308dcab53ce875c336ecb1c10d6648830db85489de424f93b1b83fd