Malicious PDF — malware analysis report

Static analysis result for SHA-256 34d732ddc4feb831…

MALICIOUS

PDF

66.0 KB Created: 2021-02-11 14:10:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 5fd125af3c9883de36cbda8aff4528f0 SHA-1: 704c8b78a6977d94e4951ed26ce28dbba7f4e952 SHA-256: 34d732ddc4feb83104ac33beb6356ae299535337ecc72a80c4f522fef019242f
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://crophysi.ru/wix?keyword=cricut+operating+manual In PDF document text
    • https://cdn.sqhk.co/tewokozogop/ijtjfz3/trending_funny_videos_today.pdfIn PDF document text
    • https://cdn.sqhk.co/sewujuzanas/ghdheZP/nosovubawemuvegoduvad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366957/normal_600fb48b8d0a4.pdfIn PDF document text
    • https://cdn.sqhk.co/wejagamewo/cheueih/mamofobowu.pdfIn PDF document text
    • http://citimart.online/employment_contract_template_uk_wordh8ubo.pdfIn PDF document text
    • https://cdn.sqhk.co/baluwofuk/hegh63f/viral_video_tik_tok_download.pdfIn PDF document text
    • https://dopijixofovaje.weebly.com/uploads/1/3/4/6/134692352/muzojajov.pdfIn PDF document text
    • https://zujomesesewega.weebly.com/uploads/1/3/4/9/134902804/3747053.pdfIn PDF document text
    • https://mazokameviseg.weebly.com/uploads/1/3/5/3/135349474/523580.pdfIn PDF document text
    • https://xewulowew.weebly.com/uploads/1/3/4/7/134757629/345597.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://banobozibijur.epizy.com/53482800855.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_off0000c63f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC63F 4980 bytes
SHA-256: c048c3e94202f0f73b2f58c94e5fc676aaca25fd0d0b5fe0777bb1d8d2db8b2c
font_01_sfnt_off0000d71c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD71C 10756 bytes
SHA-256: 39732b0b2d59c9734fbb77cdb8a98a74cac994e7761e97de0cd765ccef5cbec7