Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf9c0338984246f2…

MALICIOUS

PDF

45.8 KB Created: 2020-11-07 18:17:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: d2754343071368cb6b4849e5bd41a894 SHA-1: bf7e92b2ad58bec83e47877f980816b157b22086 SHA-256: bf9c0338984246f27f3d092662e77490979a192133cd943083af669fd897b961
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://traffnew.ru/123?keyword=flight+simulator+apk+mod PDF link annotation
    • https://mitigovoponezix.weebly.com/uploads/1/3/4/3/134375948/1946569.pdfIn PDF document text
    • https://wefekexuse.weebly.com/uploads/1/3/4/6/134685634/jawisisimef.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414153/normal_5fa2a16247b84.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379842/normal_5f8c3f283bee2.pdfIn PDF document text
    • https://dulowufokupi.weebly.com/uploads/1/3/4/4/134495444/3553253.pdfIn PDF document text
    • https://kavixonew.weebly.com/uploads/1/3/4/5/134592395/3d6c5e7560.pdfIn PDF document text
    • https://lavuzolitad.weebly.com/uploads/1/3/4/3/134327879/wanapod_datebala_butinomaju.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/82ec684d-51be-4507-9bdd-afd0d497ebf3/wakavasuxoludaxudafi.pdfIn PDF document text
    • https://s3.amazonaws.com/bizamesuwepe/kujewazopulegagebususovi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/07975bfa-de1e-4368-ad56-7fc3a28f0f2f/livro_sobre_analise_fundamentalista.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/active_vs_passive_immunity.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f959a3fd-d6d6-4617-a751-ad2ed0eaa2fc/xeduki.pdfIn PDF document text
    • https://s3.amazonaws.com/tejuvonixag/jokosa.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000752b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x752B 5392 bytes
SHA-256: 8694369b729c0c4abb143a3d3289d05b9a12722c0de4a1ad357914a4d4f011ba
font_01_sfnt_off00008753.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8753 10444 bytes
SHA-256: 9f24a3ec819506321a4abd1ed51c6c44219ee15d6fb8c85e117be81eefab2560

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