Malicious PDF — malware analysis report

Static analysis result for SHA-256 d29ed5b781beae58…

MALICIOUS

PDF

65.8 KB Created: 2021-02-12 02:47:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 3a4c868bf10100cb1e371353a937f914 SHA-1: 0e4e52b59897efc798189876e153d6cd6bb3dc52 SHA-256: d29ed5b781beae585aa3b8f23387778ba9b7b74246ed6528ee84a7064f49418a
244 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://crophysi.ru/123?utm_term=work+power+and+machines+worksheet+answers In PDF document text
    • https://cdn.sqhk.co/ributexovek/hibhipG/world_building_craft_mod_apk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413362/normal_5fff5e981b380.pdfIn PDF document text
    • https://tilakajunobeka.weebly.com/uploads/1/3/0/7/130739719/nakevezawinipe.pdfIn PDF document text
    • https://walowopus.weebly.com/uploads/1/3/5/2/135295279/7035887.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409806/normal_6007cbdd2b962.pdfIn PDF document text
    • https://cdn.sqhk.co/kadeposamo/7kififk/ticket_to_ride_for_playlink.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450248/normal_5ff6803e89065.pdfIn PDF document text
    • https://lilafigofuku.weebly.com/uploads/1/3/1/3/131398347/bobavanizusazuvagedi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450635/normal_5ff7786cc80a2.pdfIn PDF document text
    • https://cdn.sqhk.co/badaxiloru/qhbiaic/dunugidozolapisi.pdfIn PDF document text
    • https://cdn.sqhk.co/dazibewibu/Xhehdje/xezamususexusumuguduzoxew.pdfIn PDF document text
    • https://cdn.sqhk.co/dusivubeleza/gicrUgf/sky_whale_game_free_online.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dojidusajotat.epizy.com/zepazuwizi.pdfIn PDF document text
    • https://s3.amazonaws.com/samopakamefap/dilovowerukutiguzonap.pdfIn PDF document text
    • http://zunuwovadete.epizy.com/soundtrack_film_autumn_in_my_heart.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_off0000c54e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC54E 5452 bytes
SHA-256: f9780a0a85d372961a821758aa77e0ed40f394aead7c15e46746652946a4265a
font_01_sfnt_off0000d7c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7C8 10120 bytes
SHA-256: e0f09be20fd31df754c497ff411ec04a4025f8d3b402a75fb7ab1100785effe6

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