Malicious PDF — malware analysis report

Static analysis result for SHA-256 68358599a4d5107d…

MALICIOUS

PDF

46.2 KB Created: 2020-11-08 12:39:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 292058441296d7a1a63cc63e64eda791 SHA-1: 92bbe8d059a3edfa8f4934ca6c5189e6ad01fa8b SHA-256: 68358599a4d5107d4909bcab370c66fa506e1fa61863cdbbd908e4d23ea55ff0
66 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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://trafftec.ru/123?keyword=swain+guide+s8 PDF link annotation
    • https://talapilodegopez.weebly.com/uploads/1/3/0/9/130969507/mufavigirip_mizewiber_rotapafufiwipek.pdfIn PDF document text
    • https://baresifesej.weebly.com/uploads/1/3/4/1/134131831/5251691.pdfIn PDF document text
    • https://wetuxabo.weebly.com/uploads/1/3/0/8/130873937/42137.pdfIn PDF document text
    • https://nirawulef.weebly.com/uploads/1/3/4/3/134324477/affb4.pdfIn PDF document text
    • https://nowusunomotir.weebly.com/uploads/1/3/4/3/134314498/4570134.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418370/normal_5fa1b91192932.pdfIn PDF document text
    • https://gorigopaf.weebly.com/uploads/1/3/4/3/134341526/5579781.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386347/normal_5f9240c2194ed.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/81d96b03-1606-4175-b1ae-dc0f42ff54df/35428562271.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/feebd3db-7628-4be8-8c4a-2d595035a4e8/bobby_mcgee_chords.pdfIn PDF document text
    • https://pokekigo.files.wordpress.com/2020/11/lord_of_the_rings_book_free.pdfIn PDF document text
    • https://nanopitozute.files.wordpress.com/2020/11/sherlock_holmes_book_arthur_conan_doyle.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000691e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x691E 4944 bytes
SHA-256: e5ca48b291ee08d1afde66ec55a5a94a5380b021cc8b1d1d9513f812e9cf09ce
font_01_sfnt_off000079f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x79F5 10920 bytes
SHA-256: 2ff829aa89f98f23c099e80a40b60c36addd5e4868526142872afbf22e3697e2
font_02_sfnt_off00009e12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9E12 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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