Malicious PDF — malware analysis report

Static analysis result for SHA-256 608a3a7757064588…

MALICIOUS

PDF

64.0 KB Created: 2021-03-03 16:16:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 610783650792d3a95d2f2df778db6d6b SHA-1: 0f32feaae90d64d9f3f185a95266d01ac28eb7b8 SHA-256: 608a3a7757064588eb93ff0b71879519670bcf18c0406cb72f55d7a60c56bb59
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://dafemum.ru/award?keyword=what+causes+a+dishwasher+not+to+drain+water In PDF document text
    • http://bopugafuwu.scienceontheweb.net/xbox_live_error_code_8015d002.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408475/normal_5ff58bd7842f9.pdfIn PDF document text
    • https://cdn.sqhk.co/puxezuxivas/hjanJQW/tachyon_illumination_rods_review.pdfIn PDF document text
    • https://cdn.sqhk.co/joxomawezu/TmjeFhi/gijidegek.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463791/normal_601581debf4a4.pdfIn PDF document text
    • https://laxigotugib.weebly.com/uploads/1/3/0/9/130969680/posebupukaz_botol_daxugoxeraxorow_rexakuvog.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414500/normal_602e6e4e697a4.pdfIn PDF document text
    • http://scm03.ru/guided_imagery_for_stress_script2ebrj.pdfIn PDF document text
    • https://cdn.sqhk.co/dafibuxoki/fGhgrih/lobipiwotepowe.pdfIn PDF document text
    • https://cdn.sqhk.co/litalile/jjTlaqO/63153854428.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449769/normal_5fd3d0a4dfcd0.pdfIn PDF document text
    • http://barajofa.mywebcommunity.org/how_to_program_seiki_remote.pdfIn PDF document text
    • https://diwekapuxejube.weebly.com/uploads/1/3/1/4/131455019/bavepelavobifovupuk.pdfIn PDF document text
    • https://cdn.sqhk.co/sujoxeti/hihepoh/shake_shack_order.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000c076.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC076 5100 bytes
SHA-256: 10bc65caa77bc97d7ddb3ce375d4a2b1bd2de90282f09f168216d0ea97d440d9
font_01_sfnt_off0000d1da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1DA 9684 bytes
SHA-256: 3e5743c4c6d0a6ff2e431ac5eeffa8da21f4decde248695f64de134aca091a08

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