Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0c86783d1c4cef4…

MALICIOUS

PDF

40.8 KB Created: 2020-11-06 11:24:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2022-06-20
MD5: ea0416b45b1f043ae820252a03d442a0 SHA-1: 85ba0440167d2992586cee342e6a243ce1232c8d SHA-256: a0c86783d1c4cef485eb5fdc43ac8229fc0cefadfab26c1d024f7740e44f20e9
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://trafffi.ru/aws?keyword=california+civil+code+section+1954.603 PDF link annotation
    • https://fimozafovobas.weebly.com/uploads/1/3/2/7/132741130/577239.pdfIn PDF document text
    • https://ramipataxeki.weebly.com/uploads/1/3/4/4/134483057/5645586.pdfIn PDF document text
    • https://xidelesa.weebly.com/uploads/1/3/4/4/134498911/ropepinoti-mozeze-mixapalezodox.pdfIn PDF document text
    • https://fulodovujigiw.weebly.com/uploads/1/3/4/0/134016909/5418130.pdfIn PDF document text
    • https://naxedomabaxa.weebly.com/uploads/1/3/1/6/131606472/822468.pdfIn PDF document text
    • https://tafuposavibado.weebly.com/uploads/1/3/4/0/134017079/6779b81d7bcf.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/3665/3748/files/social_science_textbook_grade_11.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e75f5aa0-aae5-49d7-b3e3-d2b525be55a4/88466992843.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5658979a-bf56-46ed-8752-7002b993d2a5/18152608349.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a4f43937-c314-43c7-b570-4cee93572867/pejonovogajivevowinamates.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_off00005fab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FAB 5892 bytes
SHA-256: b433b1df9018077adb2e7780184fc874546960997141559feea8df97b516afac
font_01_sfnt_off000073d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x73D3 10140 bytes
SHA-256: 91dfbfbfadea0a14c359f58970add6a000b87458b2e53a72a7960e1d7e7bc14f