Malicious PDF — malware analysis report

Static analysis result for SHA-256 a05d48de255cf16f…

MALICIOUS

PDF

62.8 KB Created: 2020-12-18 22:34:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 41abb99c43be6d95523a43720bc9e3b5 SHA-1: 9f32cca58b7b78661f3bbfa42746e305362c1f4b SHA-256: a05d48de255cf16fcbfbdad2f9a79b2be7e373f9b4497dbb9a8d462f01b2ada6
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://trafffe.ru/square?utm_term=3d+beading+patterns+free PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4450732/normal_5fc9cf133b655.pdfIn PDF document text
    • https://donibirumot.weebly.com/uploads/1/3/4/4/134463545/sofotuz.pdfIn PDF document text
    • https://gesunujas.weebly.com/uploads/1/3/4/5/134509411/1166138.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443329/normal_5fa43215ecf46.pdfIn PDF document text
    • https://wapapoda.weebly.com/uploads/1/3/4/5/134581042/vomokixapupegozovez.pdfIn PDF document text
    • https://vugawijop.weebly.com/uploads/1/3/4/5/134594760/zinavuxovowa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/93e5a203-1907-4f6b-a5fc-db8515d84fcd/percy_joseph_carrey_age.pdfIn PDF document text
    • https://s3.amazonaws.com/vatakefojunib/90266988091.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f1ae6d03-a951-4c4c-8dc5-2c60352f9617/running_lean_ash_maurya.pdfIn PDF document text
    • https://s3.amazonaws.com/dowavelaxam/rifate.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0a346e38-f507-4da1-835b-53dcdcda8660/command_science_secondary_school_agwada.pdfIn PDF document text
    • https://s3.amazonaws.com/dejolavubukugeb/mizad.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2d79d403-3adb-4f4a-b8cb-35915fadcfe3/aa_daily_moral_inventory_card.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5343b239b0722914d6867/t/5fd72380dca22152605ad93c/1607934849328/48614544538.pdfIn PDF document text
    • https://s3.amazonaws.com/kabisebax/casio_wave_ceptor_5052_manual.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_off0000b951.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB951 5388 bytes
SHA-256: 892b2bf6fa7aae008f92ceea5fc95652a7e0e12a6719d9e28adfb11b32ae0354
font_01_sfnt_off0000cbac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBAC 10452 bytes
SHA-256: cde6805fd6a8367565f8fd4cf74e5e387051b689561181bcc1720c6843fea1a2

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