Malicious PDF — malware analysis report

Static analysis result for SHA-256 30a143ac0a25d210…

MALICIOUS

PDF

66.4 KB Created: 2020-11-26 02:59:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: f8bc1084ee2c1221a97b8b55935dafbb SHA-1: 5febef219fc79e539fcfbbfa43196c9482b01bf5 SHA-256: 30a143ac0a25d210b1e31c16eacad9bd711ca8927882b491ed201d2ad8b6a2aa
154 Risk Score

Malware Insights

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

The PDF file contains numerous links to external websites, many of which are hosted on link farms and redirect to malicious infrastructure. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' indicates that one of the primary URLs leads to known malicious redirector infrastructure. The presence of a link farm suggests an attempt to distribute malware or phishing content through a large number of seemingly legitimate but ultimately harmful links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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?utm_term=ccna+portable+command+guide+3rd+edition+pdf In PDF document text
    • https://zoforute.weebly.com/uploads/1/3/4/3/134352948/35ffd010c5185.pdfIn PDF document text
    • https://xavoxoxuda.weebly.com/uploads/1/3/1/3/131379246/gituvewokokiniwi.pdfIn PDF document text
    • https://venifamu.weebly.com/uploads/1/3/4/5/134501621/kixufiputaru-zovef.pdfIn PDF document text
    • https://rixajijinuroje.weebly.com/uploads/1/3/4/4/134473879/8824203.pdfIn PDF document text
    • https://sosufafa.weebly.com/uploads/1/3/4/8/134862430/doridotitorono.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379973/normal_5f93b566dc375.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446395/normal_5fba664391367.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373519/normal_5f8bc61b441c2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368962/normal_5f8ac2ba25494.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386334/normal_5f8c82f2b5613.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367277/normal_5fa31b9161218.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387807/normal_5fb511d5d5a86.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/fb06d3e5-80fb-4d94-81fb-561dafec3193/old_testament_study_guide_lds.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_off0000b688.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB688 5508 bytes
SHA-256: 293a153aecec596360fc5552c9da0ec69dbe40ba913f4b7a8f171ab950889a50
font_01_sfnt_off0000c91f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC91F 11000 bytes
SHA-256: 07724c1c7229762f7f11a8ddca2e8b955695fd03149fee094c7dfa00e4672a7a
font_02_sfnt_off0000ee9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE9E 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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