Malicious PDF — malware analysis report

Static analysis result for SHA-256 51b090a0a6f425c2…

MALICIOUS

PDF

67.9 KB Created: 2021-03-03 15:29:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 2dbe8ba63caac9505adc47fbcd60232a SHA-1: 3519cf82481d0a46bed6971f161f5dada4c88b79 SHA-256: 51b090a0a6f425c24d272a4357c2315dfd0153adc383e05832bd13b9ac0dab78
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=minecraft+pe+apk+0.14.0+free+download PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4366027/normal_5fe26de495700.pdfIn PDF document text
    • https://sobemifukoku.weebly.com/uploads/1/3/4/8/134887972/4461d155f9b33d.pdfIn PDF document text
    • http://navewezaninub.iblogger.org/jozelamatuf.pdfIn PDF document text
    • https://digexuvin.weebly.com/uploads/1/3/2/8/132814990/maxibe.pdfIn PDF document text
    • https://bumufufumobumag.weebly.com/uploads/1/3/2/8/132815806/rodofivab.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4376125/normal_5feb638d4f5ff.pdfIn PDF document text
    • https://nakilogizo.weebly.com/uploads/1/3/4/3/134363069/vowet_piwiza_kiravatomilojo_finuleto.pdfIn PDF document text
    • https://kuwujevo.weebly.com/uploads/1/3/4/8/134864034/541873.pdfIn PDF document text
    • https://nawajutexi.weebly.com/uploads/1/3/4/1/134108687/2151703.pdfIn PDF document text
    • http://pumujavebedopa.iblogger.org/pegakoge.pdfIn PDF document text
    • https://nasejanebuxilas.weebly.com/uploads/1/3/1/8/131856105/nitonilakolej-rexoseta-mizogam.pdfIn PDF document text
    • https://wifevotus.weebly.com/uploads/1/3/4/8/134897576/3030508.pdfIn PDF document text
    • https://robavefozaxun.weebly.com/uploads/1/3/4/3/134379548/luziseb.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/rafiralexezol/adaway_for_android.pdfIn PDF document text
    • http://lunupesefobe.rf.gd/67806491575.pdfIn PDF document text
    • https://s3.amazonaws.com/zodererezuzuxi/room_on_the_broom_book_genre.pdfIn PDF document text
    • http://xazomagojuwa.epizy.com/what_is_meaning_of_make_up_in_malayalam.pdfIn PDF document text
    • https://s3.amazonaws.com/wopari/google_sheets_lookup_unsorted.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_off0000cd23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD23 5444 bytes
SHA-256: 0ee16c756e0966321b3a2081388e663db3a842670dd5b7b6da6eb431fd8e6306
font_01_sfnt_off0000dfeb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFEB 10040 bytes
SHA-256: 48b93054a347a354e27e10ac1ed7dd1dff774118e70075017303de09cb2b515c

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