Malicious PDF — malware analysis report

Static analysis result for SHA-256 aceac02d62997065…

MALICIOUS

PDF

67.6 KB Created: 2021-02-03 16:56:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 545b1e6876c9dd3c5c37759d5ce41216 SHA-1: 86c3d904477de1cb0764274a5cfd61f6d773919c SHA-256: aceac02d62997065e2dedba0a38149a82db9294575065c1460bee0cf2d0d6f8a
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://maypoin.ru/wb?keyword=scatter%20plot%20correlation%20worksheet%20pdf%20answers PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4502563/normal_6005ee165b646.pdfIn PDF document text
    • https://cdn.sqhk.co/bowawugafux/jhgjgdd/coin_dozer_sweepstakes.pdfIn PDF document text
    • https://cdn.sqhk.co/zoboxoba/jeo4ja5/minecraft_free_download_pc_tlauncher_2020.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477147/normal_5fd665fd82228.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415061/normal_5fca68633cdff.pdfIn PDF document text
    • https://cdn.sqhk.co/zidezofa/jjqFDPZ/fantasy_kingdom_defense_unlimited_gems_apk.pdfIn PDF document text
    • http://vatirigidofaxu.iblogger.org/kogifisen.pdfIn PDF document text
    • https://senorori.weebly.com/uploads/1/3/4/6/134641151/larobefuzojiged.pdfIn PDF document text
    • https://cdn.sqhk.co/duwutawuna/PjhGibV/bluffton_schools_sc.pdfIn PDF document text
    • https://zotagozugub.weebly.com/uploads/1/3/0/7/130739891/90ab0a0bdcd7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468530/normal_600b1497b071c.pdfIn PDF document text
    • https://mulomaninivoxom.weebly.com/uploads/1/3/1/4/131437045/darutaxabu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445320/normal_5fda9057d6808.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4479445/normal_5ff4d0ee8f419.pdfIn PDF document text
    • https://zibamikalizofu.weebly.com/uploads/1/3/1/4/131409526/4875513.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_off0000cb63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB63 5500 bytes
SHA-256: 1a28df297b1acf7b850691c320583e9b6a8335f4ecf9bff704c4a001bfb33871
font_01_sfnt_off0000de2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE2A 10360 bytes
SHA-256: 43b03bf63ba8e6dbb0a0e36cc19b0340660ba1e6268058d49c1492c3f84e3595