Malicious PDF — malware analysis report

Static analysis result for SHA-256 08932f116c106698…

MALICIOUS

PDF

61.9 KB Created: 2020-11-07 15:12:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: e690be1290985e9485993890ede93d70 SHA-1: 95eb49c8e0e61504b16fba69a853d266242ab8ce SHA-256: 08932f116c106698e7adb25c59a4b7f517433ddcbe2b6766c6d8d1debfea9544
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a significant number of external links, with one heuristic specifically identifying it as a 'PDF_SEO_LINK_FARM'. The embedded URL 'https://traffking.ru/123?keyword=4th+declension+latin+noun+endings' and the linked PDF 'https://pinoxelu.weebly.com/uploads/1/3/4/1/134108818/mosofatugizumoz.pdf' are the most suspicious indicators. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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://traffking.ru/123?keyword=4th+declension+latin+noun+endings PDF link annotation
    • https://pinoxelu.weebly.com/uploads/1/3/4/1/134108818/mosofatugizumoz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384160/normal_5f9f74e011845.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475985/normal_5fa627ba9308f.pdfIn PDF document text
    • https://mukaxonalox.weebly.com/uploads/1/3/4/5/134580963/8124183.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/b4ae5c57-b358-47a8-a955-a8ca1bac850a/nosimumu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3771a8bc-30cb-4a11-8c94-e5d2c0a228ed/degelubuxevagomekige.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb6b0de6-13b5-46c4-9217-f1413b0d7957/wajurovobogenoroxijutek.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/abacf938-9a72-4577-916b-681801c5f739/21159221502.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3f50c1f8-4c67-471f-8179-27f9613c4b79/revivotof.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6e08627f-51a0-4198-a9a3-db3f7aa445f5/58444552991.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8fc2e5f4-acd7-481b-859b-68ad8286e5d4/49557793322.pdfIn PDF document text
    • https://pixetasukero.files.wordpress.com/2020/11/62788692444.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6754decb-eb83-4f7e-ac07-08f8b3e97620/vupujag.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ed020960-2bcc-45e6-8cfe-4c625f0bbe5f/grim_dawn_shrine_locations_map.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bb82215b-6d3f-4fdc-bd38-6a70f307c87e/gidogeroparipu.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_off0000b58a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB58A 5096 bytes
SHA-256: b207a7ea53fceac6dc1ea372ecbe552be5bad85a0db49bdef774fea26939856c
font_01_sfnt_off0000c6e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6E1 10628 bytes
SHA-256: d5ec852d76f034ccbc8ec0483e61ede5b752729d7c18c076c10019f969312024

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