Malicious PDF — malware analysis report

Static analysis result for SHA-256 846e6eed4c9f91e5…

MALICIOUS

PDF

50.3 KB Created: 2020-10-29 07:44:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 097d85d6e1dc3e42040b67d9e8110905 SHA-1: 2b9112b7bf54211552e703c870ea6436f1f18bb9 SHA-256: 846e6eed4c9f91e5383dedfde75bcf7d5a8375eb6cc23c6d1c5e40ae02945cfd
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a redirector URL known for malicious activity. The ML classifier strongly indicates maliciousness. The document body contains a URL that appears to be part of the link farm, suggesting a social engineering attempt to drive traffic to malicious infrastructure.

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 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.
  • 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://gettraff.ru/strik?keyword=everytime+boy+pablo In PDF document text
    • https://xexovelez.weebly.com/uploads/1/3/0/8/130813416/litozafetafifa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415950/normal_5f99601a151b7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381988/normal_5f92c40070594.pdfIn PDF document text
    • https://xifepifedezuz.weebly.com/uploads/1/3/4/4/134495844/8586394.pdfIn PDF document text
    • https://rimosuvifakub.weebly.com/uploads/1/3/4/3/134310068/3291340.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375521/normal_5f8b669cd4a41.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369665/normal_5f978734190ba.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/cf20530d-31ea-43ed-b4fc-9b02db7c7bfe/dujipavibaruxugukisojow.pdfIn PDF document text
    • https://s3.amazonaws.com/wukara/54202410705.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e4a21df7-964c-4c41-9e14-2a0407dbbf6c/tapopetajeperi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1dfc9f61-6187-435a-bf3f-db03106bc18c/34015555693.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/89f1696e-f2d0-43ea-a20d-7e1a29ad8536/fusal.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b127c8d3-5b33-493a-8fee-10bf8c534fa5/santa_monica_library_overdrive.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5fbf7c4c-6da0-4003-b8a4-73bd8bafa21b/69439123935.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0a8161ec-b0e1-4b61-ac74-5996ad89ddc6/tavamivefixoderazosirodo.pdfIn PDF document text
    • https://s3.amazonaws.com/minaxigevani/ketogene_rezepte.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/32577fea-451a-4fec-b8bb-2210b4645dac/21438148879.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8e2aeba2-8c57-4807-81bd-f24da2149928/vector_mechanics_for_engineers_dynamics_9th_edition_solution_manual_chapter_11.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f49798a5-7843-46c4-ab92-9ba7bc0c9007/6133834799.pdfIn PDF document text
    • https://s3.amazonaws.com/sojaxub/cards_against_humanity_green_box_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c65c6d3d-3761-490e-b2f9-f64bc78bd205/sepug.pdfIn PDF document text
    • https://s3.amazonaws.com/zetare/59738177212.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_off00007864.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7864 4728 bytes
SHA-256: 694e46c5a932f4339485883eb4727b26a28a618d89f5a6c09a4f9de8da61cb01
font_01_sfnt_off00008876.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8876 10952 bytes
SHA-256: c8d4ecf7ffd930a28e14b95072ec95c303a009be4f23ced51627b647f617bfec
font_02_sfnt_off0000ad97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAD97 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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