Malicious PDF — malware analysis report

Static analysis result for SHA-256 b6e921d022c0ebb4…

MALICIOUS

PDF

53.1 KB Created: 2020-11-08 08:43:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: d34a8965d7e24d3c7d9a900b2e8831ea SHA-1: 21ac5341021e5cf1c32d0f18c5096145fe4fc1f1 SHA-256: b6e921d022c0ebb4d84f7f678d457558017b6456886e77614e431d7f514c6a78
124 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

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 and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://traffmen.ru/123?keyword=starbucks+receipt+code In PDF document text
    • https://razulusajo.weebly.com/uploads/1/3/4/4/134467314/ec24e4618b.pdfIn PDF document text
    • https://xoxujodega.weebly.com/uploads/1/3/4/3/134363828/lasobekotubaliw-metepa-ladus.pdfIn PDF document text
    • https://laxigozi.weebly.com/uploads/1/3/4/3/134361341/7708808.pdfIn PDF document text
    • https://zuxizakubapepo.weebly.com/uploads/1/3/4/3/134317428/roxewex.pdfIn PDF document text
    • https://tunegize.weebly.com/uploads/1/3/4/5/134500295/jetefimizada_tapitevav_jubom.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381090/normal_5f8d057ac94cf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419423/normal_5f9db0d912cb3.pdfIn PDF document text
    • https://jikeberu.weebly.com/uploads/1/3/1/8/131857846/gitonunoku.pdfIn PDF document text
    • https://kopezemab.weebly.com/uploads/1/3/4/3/134339977/6581502.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/7e2fe380-910c-4e96-ab70-ae127d6451ae/god_of_war_hacksilver.pdfIn PDF document text
    • https://s3.amazonaws.com/tetazino/analytical_reasoning_questions_and_answers_with_explanation_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/degagaziv/depikokoxobov.pdfIn PDF document text
    • https://s3.amazonaws.com/mawesenasijoser/luwumem.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5b5bc629-7db9-4a62-9e05-044881ce590f/retenonodozopasalejeruxuz.pdfIn PDF document text
    • https://s3.amazonaws.com/xotomisen/pokusifiworulugiposab.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000078e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x78E3 2828 bytes
SHA-256: a17885b4fd577e0298a64705d5055d2ac7c2363fd7008e9cf236b3df412a17d8
font_01_sfnt_off000082dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x82DD 5120 bytes
SHA-256: 238bd6b98866e382838f4ab063646bdb82c2d8d840de1258385a88485127539a
font_02_sfnt_off0000944a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x944A 10336 bytes
SHA-256: aee905ae90cd87646b360feadc8aeabe1f836e5d6fa5a0dee39ed284528740e3
font_03_sfnt_off0000b71e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB71E 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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