Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b65204859c25f3b…

MALICIOUS

PDF

40.0 KB Created: 2020-11-09 15:24:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: f836fb0d0b59e8c1c9ad971a10718fb7 SHA-1: b90cff419fa3d6c33d31e212251248f7bc7bfa0e SHA-256: 2b65204859c25f3bf100b8fb6015eab3f5765f3eb45e4e11bf95940d7d5e9b22
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with the primary link directing to a known malicious redirector. The document body, though partially corrupted, contains text suggesting it is a service manual, which is a common lure for SEO spam and phishing campaigns. The ML classifier strongly indicated maliciousness, and the presence of a malicious redirector URL supports this assessment.

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://cctraff.ru/123?keyword=suzuki+gsxr+600+service+manual In PDF document text
    • https://cdn-cms.f-static.net/uploads/4405902/normal_5fa6a7bbee536.pdfIn PDF document text
    • https://tozarezev.weebly.com/uploads/1/3/4/3/134374844/8540069.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415077/normal_5f97b3c3616c6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367299/normal_5f8acf0e46fb3.pdfIn PDF document text
    • https://pobufulali.weebly.com/uploads/1/3/4/4/134494274/bodojefejaboje.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417656/normal_5f9b33b710052.pdfIn PDF document text
    • https://xesilowavexaweg.weebly.com/uploads/1/3/4/2/134265648/6062489.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379043/normal_5f9e108d785e8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369508/normal_5f9656c785118.pdfIn PDF document text
    • https://jufaxexave.weebly.com/uploads/1/3/0/7/130775513/d16d0b.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/henghuili-files/entrenamiento_calistenia.pdfIn PDF document text
    • https://s3.amazonaws.com/robumuduluwise/24661349238.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2041879e-1ece-4873-977b-d3f15a1161ec/81280044036.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/84f7e2b5-cbd4-4019-bfa6-70938a57753d/tamodolevoda.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_off00005a4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5A4B 5760 bytes
SHA-256: 6474b53b47c395293e9f3fed4d1d9f010256389fce5d9b7d92f3edae688409d9
font_01_sfnt_off00006dec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6DEC 11132 bytes
SHA-256: cf228852526b4b90cfd169fafec38b0ddd429e7c0fa9b240531968c469b0fc1d

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