Malicious PDF — malware analysis report

Static analysis result for SHA-256 c8bbb952ba240d5f…

MALICIOUS

PDF

72.5 KB Created: 2021-02-24 01:48:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: a8b3ab289bbe76cea8420be5b902b5a8 SHA-1: d2397bbef53d3969b1c93e3c72e44ab14b073177 SHA-256: c8bbb952ba240d5fad3257ffba871b2c6189a9519b8f113ff1e5003efa0693f1
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/wix?keyword=terry+goodkind+warheart+download PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4530910/normal_60119a58bf5c9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369502/normal_5fd763f5b5369.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501777/normal_5fd17155dfced.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495696/normal_5fd713f303726.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451035/normal_6029b5ec86bc7.pdfIn PDF document text
    • https://pesadosopovito.weebly.com/uploads/1/3/4/2/134235692/jeted-gutojeg.pdfIn PDF document text
    • https://zedowegekinusil.weebly.com/uploads/1/3/3/9/133997302/zufafanodiwape-tujudowudojigi.pdfIn PDF document text
    • https://katodelof.weebly.com/uploads/1/3/6/0/136051175/kugokarewikes.pdfIn PDF document text
    • https://wunovolal.weebly.com/uploads/1/3/5/3/135311751/6500796.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384469/normal_5fe311379f0fe.pdfIn PDF document text
    • https://javagakikidubat.weebly.com/uploads/1/3/0/9/130969576/88de7ae.pdfIn PDF document text
    • https://sixutaxujarupi.weebly.com/uploads/1/3/4/8/134882582/tamigokexaduzujo.pdfIn PDF document text
    • https://lopuvekire.weebly.com/uploads/1/3/0/8/130813144/9776618.pdfIn PDF document text
    • http://kotiwiwax.iblogger.org/57787375473.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://ritanuwo.epizy.com/atbu_admission_list.pdfIn PDF document text
    • https://s3.amazonaws.com/juliziwojatige/fiwejuxosidinopigow.pdfIn PDF document text
    • http://sakikuzugodo.rf.gd/26357490402.pdfIn PDF document text
    • http://wobemiko.epizy.com/ad_blocker_apk_xda.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dfbd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFBD 5116 bytes
SHA-256: 35a4128efbf283ee6f505db94db73faee67c2b13ff38bc1eb9d13f0eb30bc950
font_01_sfnt_off0000f138.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF138 10384 bytes
SHA-256: 28060c241f12c1c7359d1d456455dfd90f75253c0582dcad2fafbcbfe6bc05e4

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