Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c2e3e45c5f21ffd…

MALICIOUS

PDF

53.8 KB Created: 2020-10-04 21:44:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 67e48470812d9dd0a2c3f915f1f2578a SHA-1: 2a11fa8592f7c66e2342e40a335d8f8a123734d2 SHA-256: 0c2e3e45c5f21ffde516d72bed751c85db9a8632005504058f6aee97229cd3c7
154 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 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://ggtraff.ru/strik?keyword=biblical+meaning+of+colours+pdf In PDF document text
    • http://jipojalo.musicartsmovement.com/uploads/1/3/0/8/130873843/19e1a6e0d.pdfIn PDF document text
    • http://wujonux.specialhandsgroup.com/uploads/1/3/1/4/131454373/53b87995ca045a5.pdfIn PDF document text
    • http://files.artwaddleboerne.org/uploads/1/3/1/3/131379938/ramanetiro_refafog_gilarubi.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/f20af3d0-3999-4e42-b1ac-733710d9bc59/82244103073.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7049a7d5-967a-4e3a-902d-9b1e4559e67b/19238236361.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/846db4d2-b663-41ff-9b7d-06c4ecf3e3af/rutisapalugoduraf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8578fc74-ec36-41b9-b2aa-43439be9cb09/fugopudetomi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/096c6aeb-6595-49d3-97bd-5977b87ad3bb/76304352175.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/759d58f0-1f99-4297-bead-a8083a0b3be3/78579455394.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/966bda9c-7a06-428e-9bfd-8e1227077593/xavilapep.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/358ce797-97b8-4bf7-9d89-5bdad152815c/pajukubupobe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6efbc6d0-422b-4750-b10a-65156698c8f1/pomoxusukavukan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b286ac4b-154e-4d95-8afa-02bf8f7836ab/3610691225.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ebbc7a7f-46b2-4d42-8356-ccdd1ab195a2/84010610931.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d733c776-e215-4e01-a3bd-eaf1dc47df4e/bebaba.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/44b47242-8b0e-488b-9ae3-94c71c1aeaab/taretegexi.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_off00008716.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8716 5464 bytes
SHA-256: 8d0dee653c91498dfcbbb00402e214d851293530f47ba564f3ed8a02ea7277f8
font_01_sfnt_off0000997b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x997B 10088 bytes
SHA-256: 255ac4c904f1b0b4944d16cedb7289a511a5f0bfda6b02578f2ba4f2d2d7c58c
font_02_sfnt_off0000bbff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBBFF 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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