Malicious PDF — malware analysis report

Static analysis result for SHA-256 a50f264a20dade34…

MALICIOUS

PDF

75.7 KB Created: 2021-02-28 02:49:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: d0a48f4e1893195233bad08ee27f2d7e SHA-1: 50cdbbafbfec4746f42cfe80d5e907f27d4d5b51 SHA-256: a50f264a20dade349799048f1ae2e00bf4e0009009b533ea10c822cfd8fbdff8
186 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
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://jottigo.ru/award?keyword=bobcat+709+backhoe+specs PDF link annotation
    • https://cdn.sqhk.co/vasozaponem/Thbi5jd/infection_symptoms_wound.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368977/normal_601fc371bf98b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477379/normal_602b10b9979fe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445115/normal_5fd7dc6aedd9f.pdfIn PDF document text
    • http://faripofijukevom.mywebcommunity.org/14402150894.pdfIn PDF document text
    • http://dkblogin-de.best/sebuledumagosawimanunovudxbgd.pdfIn PDF document text
    • http://wwbook.org/ps_vita_used_price_in_pakistanh5dll.pdfIn PDF document text
    • https://cdn.sqhk.co/somisafeg/gcTiKjc/tuner_life_online_drag_racing_unlimited_money.pdfIn PDF document text
    • http://tapozifokun.mywebcommunity.org/85806648808.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495402/normal_601e089d4f2c4.pdfIn PDF document text
    • https://xufetujada.weebly.com/uploads/1/3/4/7/134745175/c1b5f97c369fc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370284/normal_5fefa626976f6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489852/normal_5fdc42dcdf96d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450734/normal_602a4b40ab2cd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379846/normal_600980a9785f8.pdfIn PDF document text
    • http://trokot-shtorki.online/6303267382b23iv.pdfIn PDF document text
    • https://cdn.sqhk.co/remimidotomi/fbihhdT/neon_traffic_signs.pdfIn PDF document text
    • https://cdn.sqhk.co/vopupevomate/QhigjQ0/zexobosewexotorofivara.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_off0000eb72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB72 5524 bytes
SHA-256: 7c21f4fc6f41e85d04ae8e924e57c16650d17e190f87e0e12bdf08834a65a11a
font_01_sfnt_off0000fe44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE44 10408 bytes
SHA-256: bb33af868c14ec7b971919293d2b8379f0e1233c7ad3990c85b4a0fb6fef9187