Malicious PDF — malware analysis report

Static analysis result for SHA-256 35f154d9d67ef0f5…

MALICIOUS

PDF

47.2 KB Created: 2020-11-07 10:45:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 878fbd8139ef11af37f3a5ca847ea29b SHA-1: 3685baee722e59eb0711ac663dd008fa4196582f SHA-256: 35f154d9d67ef0f595a6bb43a1821324bc4a24d3d1c2873c19321d26a4e5bdb5
96 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with one primary URL leading to a search result for a game map, likely intended to disguise malicious activity. The ML classifier strongly indicated maliciousness, and the PDF structure suggests it's designed to host numerous external links, potentially for SEO manipulation or distributing further payloads. No scripts were extracted, but the presence of embedded URLs and the heuristic firings point towards a phishing or content-luring attack.

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://trafffi.ru/aws?keyword=pathfinder+kingmaker+map+revealed PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4383912/normal_5fa31d1e5b27a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379859/normal_5f9110eca5ae7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413231/normal_5f9491d02cb0e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367656/normal_5f94d7a321d17.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/2261e796-f6bd-4db7-a4e0-d9dfd5502333/8293908858.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/873bc900-ada2-450d-89ae-ee8c11aa325d/65122966322.pdfIn PDF document text
    • https://pevepunak.files.wordpress.com/2020/11/10985132760.pdfIn PDF document text
    • https://xanafegeze.files.wordpress.com/2020/11/rinizapowos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0bc73975-e687-4137-bfef-5ad0631f7690/17631720325.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/62fd36af-3737-4b48-be85-d3ca2b3a5b90/mukozabuxoxaxurute.pdfIn PDF document text
    • https://selogum.files.wordpress.com/2020/11/vitabibuvokane.pdfIn PDF document text
    • https://sirilab.files.wordpress.com/2020/11/70870375218.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2971ecf0-81d7-4612-b46c-6b16c820ba6a/pagepena.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_off00006bf6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6BF6 5080 bytes
SHA-256: ca8b9875bb10ace56db371fb85bb2749d4dec566ca33dd9a1a0f78cca48d48d7
font_01_sfnt_off00007d0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D0A 10696 bytes
SHA-256: 2f7d738a0487a6f3382b50bdd52d8347a13264761709268252afc600c5438025
font_02_sfnt_off0000a1b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA1B1 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

Open this report in the interactive analyzer, or submit your own file for analysis.