Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c5491845da91ad1…

MALICIOUS

PDF

95.2 KB Created: 2020-10-11 05:08:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: a9a42b29d8eb270c6e8d819f748ec659 SHA-1: 9489297d35802e35eedda03ca571aa72319eebf6 SHA-256: 0c5491845da91ad1b7ce5ca622b07ce3e5caf7ebedfbe18939c93ab442d04db9
154 Risk Score

Malware Insights

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

This PDF file contains a link to a known malicious redirector, which is designed to lead users to malicious websites. The document body, though heavily obfuscated, contains text related to 'Skyrim se installation directory' and a URL that appears to be part of a link farm, suggesting a phishing or scam attempt. The ML classifier also strongly indicated maliciousness.

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=skyrim+se+installation+directory In PDF document text
    • http://files.pointpleasanttradingcompany.com/uploads/1/3/1/3/131398336/rizarojirupava_befelef.pdfIn PDF document text
    • https://site-1037865.mozfiles.com/files/1037865/21898926732.pdfIn PDF document text
    • https://site-1041779.mozfiles.com/files/1041779/tibupudanizodogemoludo.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/b2d5771b-3c12-4b93-9bb9-b9fbad651d88/19289740639.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4ac48757-9653-42cc-8270-e5bc7d1a3143/rogutigenomuxoru.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c769f3ee-f517-472a-b2ab-c0d8f564bb49/badibakatokajutixesuvamew.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a679b415-1f06-44dc-a767-dc5236d4ada1/kanalazuwenijopuxixesi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/73aabc04-9c1f-48c4-b66b-ac88b1b2501b/mejafawofogo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dcddc16d-84ec-4653-8a64-ba2415ad36ab/45474983196.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1d921f29-164b-4259-bc5e-0fddee778866/mapilajolif.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e70d8dd5-5576-4461-92f8-a30304ff2985/lizunajigebobopi.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_off00012b65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B65 5140 bytes
SHA-256: e750d2e2069ac13c6f178b491ec49292d8dc938178a1c5a98a555cd7407588b8
font_01_sfnt_off00013cbc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13CBC 10876 bytes
SHA-256: 412e624bf3d375b2e06ec87f23f5564bce846e566e274dbfb19209b44841e0ac
font_02_sfnt_off000161df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x161DF 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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