Malicious PDF — malware analysis report

Static analysis result for SHA-256 10a2260201de2d11…

MALICIOUS

PDF

68.2 KB Created: 2021-02-24 20:37:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-01
MD5: d4a64db6313a3fff00a8b37c06c1d051 SHA-1: 8af02455a4a0c95ae675f8b69bcc94c20c8565a6 SHA-256: 10a2260201de2d116cbb9f2651c62f03eea02cb340010baee574e059e5c160c7
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://yafferge.ru/award?keyword=what+is+chemistry+like+in+high+school In PDF document text
    • https://cdn-cms.f-static.net/uploads/4377391/normal_6025dcac105ec.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389366/normal_6018b946e02ed.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393180/normal_5fd08e6c78808.pdfIn PDF document text
    • http://japisonaxem.22web.org/alan_walker_on_my_way_lyrics.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4423427/normal_5ff82d6a99932.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378853/normal_603677f199e08.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457577/normal_6011bd9607c53.pdfIn PDF document text
    • http://vikorurapufor.iblogger.org/slick_rick_songs_free.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://katakamubu.rf.gd/are_hot_water_heater_elements_universal.pdfIn PDF document text
    • https://s3.amazonaws.com/gorajikunobixi/70628890891.pdfIn PDF document text
    • http://xonitobilabi.rf.gd/pictionary_words_printable.pdfIn PDF document text
    • http://pavasokunise.epizy.com/gekurotixezisogo.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_off0000cddf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDDF 5392 bytes
SHA-256: 60b7f71ed68083e694c0824f3bd05ebeb7eefe971ead26c229b249318ef91a74
font_01_sfnt_off0000e020.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE020 10492 bytes
SHA-256: c8c6d6f4485f78b6388cfa2cdfccafed5541fd9535ac6cd175edf72f41a93957