Malicious PDF — malware analysis report

Static analysis result for SHA-256 7873678d717c7ef6…

MALICIOUS

PDF

41.0 KB Created: 2020-11-07 20:44:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-15
MD5: b0a5473ba8ac0f16e07449091fc1897b SHA-1: fb2a7bd94788d2d6b7caf843ca43050cae5eac87 SHA-256: 7873678d717c7ef611a58fda478a3c903f6aa388f19514bae50ac08a8f680a14
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=washington+domestic+policy PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4376098/normal_5f8afca0cf90d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446651/normal_5fa3ef8fa2a33.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368772/normal_5f9205b84fdee.pdfIn PDF document text
    • https://togitarusufojir.weebly.com/uploads/1/3/2/6/132681229/8497186.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366976/normal_5f9b1d0c8c5a9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412887/normal_5f9a0e73b4524.pdfIn PDF document text
    • https://gibitiwatu.weebly.com/uploads/1/3/0/7/130776060/pinitifedojes_betowudokinezav.pdfIn PDF document text
    • https://nevedaroxizewav.weebly.com/uploads/1/3/4/5/134592578/nufatuguso_wilexineva_kevekewud.pdfIn PDF document text
    • https://wigadanoj.weebly.com/uploads/1/3/4/4/134404864/59ea39ec96d4f.pdfIn PDF document text
    • https://xojerajap.weebly.com/uploads/1/3/1/3/131384359/zebapesuluboxaj.pdfIn PDF document text
    • https://jopalezaleloloj.weebly.com/uploads/1/3/1/3/131380469/dedigeta.pdfIn PDF document text
    • https://vodoxakitukep.weebly.com/uploads/1/3/4/3/134335140/lozolovar.pdfIn PDF document text
    • https://nobozufale.weebly.com/uploads/1/3/4/3/134322784/kometizawun.pdfIn PDF document text
    • https://nujidigazinuwag.weebly.com/uploads/1/3/4/3/134318548/3419535.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/zuses/genetics_and_molecular_biology_of_muscle_adaptation.pdfIn PDF document text
    • https://s3.amazonaws.com/sezebepit/caring_for_your_baby_and_young_child_free_download.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_off00005fca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FCA 5508 bytes
SHA-256: dbcbcfc0a5457782a39c9b9b7a51b6e5fde7a26fce85d36e5ddf9b490768bbb8
font_01_sfnt_off00007277.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7277 10728 bytes
SHA-256: 1ccc798d9ca137b79aee653949a00c85170fcabb7cbc3d9080fb538c7ab3c987