Malicious PDF — malware analysis report

Static analysis result for SHA-256 9fe4e1d34122ded0…

MALICIOUS

PDF

70.2 KB Created: 2021-02-27 03:30:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: d42c6a180131d19dd02e30e7ffb6ec94 SHA-1: 2a7f10561fe08a3dacfedce39c996ac2b29c5326 SHA-256: 9fe4e1d34122ded091126400348c836705f4af07410c29700c40f951303960bd
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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 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/award?keyword=how+much+do+abap+programmers+make In PDF document text
    • https://static.s123-cdn-static.com/uploads/4481162/normal_5ffa7ef567742.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491688/normal_5fdc6f807f967.pdfIn PDF document text
    • http://idealsit.space/29705427270l893l.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411490/normal_5fcb2cb2b785a.pdfIn PDF document text
    • http://topcabinets.xyz/arteriovenous_malformation_embolizationqqinx.pdfIn PDF document text
    • http://lnstagram-badge-verification.com/adobe_premiere_pro_manual_free_downlyh7l7.pdfIn PDF document text
    • http://testertumentum.space/dazasovolakomedotejowodit7d316.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387419/normal_5fdec8d8ec15c.pdfIn PDF document text
    • https://cdn.sqhk.co/bivuwusim/Ygegf9B/40574159752.pdfIn PDF document text
    • http://fivogudog.iblogger.org/11003217904.pdfIn PDF document text
    • https://cdn.sqhk.co/jogekiluse/hg7gdhf/mexukejililuzuxupaba.pdfIn PDF document text
    • http://safetugosuwe.22web.org/vogulefuzelowek.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vudatuvabejosix.epizy.com/artioscad_7._6_free.pdfIn PDF document text
    • http://femasusatatovet.epizy.com/caterpillar_butterfly_coloring_sheet.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_off0000cbb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBB1 5712 bytes
SHA-256: 9ca390c4f6e06205943a33cf707af6ae3ae410f2f86fd779f06c86db231425cf
font_01_sfnt_off0000defa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEFA 14060 bytes
SHA-256: a9f50300d096f60c5c66691c4f3f955b41181ef20d7d3028bcf17f0f0d2fb879