Malicious PDF — malware analysis report

Static analysis result for SHA-256 5fa6f7a3a07336a6…

MALICIOUS

PDF

56.7 KB Created: 2020-11-06 20:29:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-11
MD5: 215987999721182255f5d381c6833bfb SHA-1: 5827ae48b069dc87508cc390f5e5e6c4ba3dcaac SHA-256: 5fa6f7a3a07336a615994a2b4018e108f61d318ef2bf096186645832b0021d5c
126 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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://traffset.ru/123?keyword=cleric+saving+throws PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4381531/normal_5f8f5b823da13.pdfIn PDF document text
    • https://xuvakaxatal.weebly.com/uploads/1/3/1/0/131070170/d6dd3435beaac.pdfIn PDF document text
    • https://tivakoxidedopa.weebly.com/uploads/1/3/0/7/130776298/vesuk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410962/normal_5fa08e880c716.pdfIn PDF document text
    • https://zavisedifigi.weebly.com/uploads/1/3/4/3/134316550/xozakepi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://rezekine.files.wordpress.com/2020/11/tatojesanawav.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/73a562d1-ebf9-4de5-8159-0cd5a5b1accf/78160508606.pdfIn PDF document text
    • https://fimalul.files.wordpress.com/2020/11/xenikefeg.pdfIn PDF document text
    • https://gakibarum.files.wordpress.com/2020/11/88938693861.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d4b7faac-2b86-4049-b54f-8c967a37ec1d/5523435785.pdfIn PDF document text
    • https://sisiviweze.files.wordpress.com/2020/11/goresosuvufat.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_006_off0000a403.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xA403 28524 bytes
SHA-256: 47470a1119c344cd1eb846423c60c5f0119e702bb7ab5aa2f3238b88dca20363
font_00_sfnt_off0000707b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x707B 5120 bytes
SHA-256: 73c5c3fe42bce8597b9a1dfdfdaa75a6d79490d788c8bffd81663a68c97862d0
font_01_sfnt_off000081f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x81F1 10020 bytes
SHA-256: e193f53cbd2937f8f0dc6b323974e37fd2a92dbfe37a0a4305a3054812a1dcc1

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