Malicious PDF — malware analysis report

Static analysis result for SHA-256 12fb524f0c5f18e8…

MALICIOUS

PDF

33.6 KB Created: 2020-10-11 10:52:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: c8debf4687b39c339f234589d35e5c17 SHA-1: 7ed109de3fd67f1952e39354dccbdaa82f2a3b6d SHA-256: 12fb524f0c5f18e84424faf89b0a2d8aa939b4fa5a18805e2a0c9c3c445c8d58
154 Risk Score

Malware Insights

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

The PDF document contains numerous embedded links, with a primary link pointing to a known malicious redirector. The document body, though heavily obfuscated, includes keywords related to game cheats, suggesting a lure to entice users to click on the malicious URLs. The ML classifier strongly indicated maliciousness, and the PDF structure itself was flagged for containing a link farm.

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/strik?keyword=call+of+duty+black+ops+2+mod+menu+xbox+360+zombies In PDF document text
    • http://files.artistrybypeggy.com/uploads/1/3/0/7/130739697/a40eb5fe13ab1.pdfIn PDF document text
    • http://pudulezuj.graphiclibrary.org/uploads/1/3/1/4/131437318/mevujodufilew_sefevuno_bosubunulun.pdfIn PDF document text
    • http://zugefefed.charlesanthonystudio.com/uploads/1/3/1/3/131384169/9c62f3fd8.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/b3822790-5bca-4dcd-ba28-c3231010c3ab/xumozejevilaz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/755a8048-52f0-4d23-95d6-86d9f9cbe8d9/vojejurirowisizisapef.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2cd45237-b9d2-4417-9cf2-47dcc45d9294/25720467466.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ad227868-0624-4b82-b44c-c9a3c419b1f5/xopopotelikesotidewaxog.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9f001ae7-13e8-41dc-99f9-2551802c7b50/42873157250.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/65195733-0452-4441-b671-237f3b46d4ff/sanuvajejujik.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7cfeb8e6-8894-4d71-baec-56777508f125/37453937360.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/687ab6da-b2bf-4164-8b78-620509c01d27/39090431209.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/03c4185c-349c-44ec-ac1d-05024dd51779/vegevarubakasinivonubebaw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bbc6e723-4f8f-4931-80e0-3adcdd0b9f80/rukelikuroti.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_off0000429a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x429A 6128 bytes
SHA-256: 2ae3f36d657f93d79d2e35b7efef3cd88830d626bfd26e1c1da9c25eb48f3ff6
font_01_sfnt_off00005771.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5771 10036 bytes
SHA-256: 4d2795002f7fda493c9a0576479f2f5afbf3496480e950f2f78c1728f4697876

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