Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d21bb64f601c7f4…

MALICIOUS

PDF

67.2 KB Created: 2021-02-25 19:35:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 122099e3aa6cc86d058ad37857beef89 SHA-1: 7d455d0db5edd0201270cc43252963b1823f3744 SHA-256: 4d21bb64f601c7f4a9b3c7af530345fa9cf6439c442f0c6a3681acc0bb6dc653
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://jacksth.ru/award?keyword=brinkmann+smoke+n+grill+5+burner+parts PDF link annotation
    • https://cdn.sqhk.co/taduzotul/icie5dZ/vusuputigepu.pdfIn PDF document text
    • https://cdn.sqhk.co/gisatajofo/igcSyif/voodoo_boombox_occasion.pdfIn PDF document text
    • https://cdn.sqhk.co/nuzifixe/ghihRib/6639450220.pdfIn PDF document text
    • https://cdn.sqhk.co/lexoxuxoluvi/sejemdr/stick_it_film_complet_streaming.pdfIn PDF document text
    • https://cdn.sqhk.co/temejikowewa/hauja36/safari_gadi_2020_model.pdfIn PDF document text
    • https://cdn.sqhk.co/voxoduvi/bKGadud/words_in_words_examples.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489975/normal_5fcbc7e7bf437.pdfIn PDF document text
    • https://nuvitofoje.weebly.com/uploads/1/3/4/6/134640236/8767d3c1.pdfIn PDF document text
    • https://fejejupusojovif.weebly.com/uploads/1/3/1/4/131483068/5541b.pdfIn PDF document text
    • https://zeraxoxuret.weebly.com/uploads/1/3/4/6/134642117/620179.pdfIn PDF document text
    • https://xinotetul.weebly.com/uploads/1/3/5/3/135351743/gavipibozafesidoge.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4503524/normal_5fdb677b9a880.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369499/normal_5ff7730f1ae04.pdfIn PDF document text
    • http://domexogod.22web.org/how_do_you_charge_plantronics_voyager_legend.pdfIn PDF document text
    • https://cdn.sqhk.co/noxisoture/gf3xzYv/chris_stapleton_new_song_starting_over_lyrics.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_off0000cb15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB15 5516 bytes
SHA-256: 2aa519808fd276349180200e5fc32169ea18ae7fd586d37f401d544be40de085
font_01_sfnt_off0000ddc1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDC1 9920 bytes
SHA-256: 1c4104ef7a9c54efdf53ea93456a0bc07c55686e3a3bbd7f07dd6fd8b549a8b9