Malicious PDF — malware analysis report

Static analysis result for SHA-256 68b7bb56f4515ef9…

MALICIOUS

PDF

66.9 KB Created: 2020-11-21 05:09:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 6c2d27d494b6845a86a6ef5fd3b58e1d SHA-1: d4596ff7392c8bfb79fd33a8b4f1704ca61cba9f SHA-256: 68b7bb56f4515ef94f561c10b724d2b2f14b6d743d8535f21794cafa0e3ea44e
214 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, with one identified as a malicious redirector. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, appears to be a lure related to vehicle sales, likely intended to drive traffic to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://gettraff.ru/123?utm_term=manual+transmission+vehicles+for+sale+edmonton In PDF document text
    • https://cdn-cms.f-static.net/uploads/4478378/normal_5fb54f148167b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402533/normal_5f9209344dbdf.pdfIn PDF document text
    • https://gawokuvaz.weebly.com/uploads/1/3/4/6/134656265/7047370.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369909/normal_5f8917a1458e1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372673/normal_5fb5f99bd4d7f.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/37583009-5c99-4436-a684-792363a4e736/ace_combat_7_mission_5.pdfIn PDF document text
    • https://s3.amazonaws.com/pewebopufupe/62772892131.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/63fc2e86-5a7d-4a09-b9c7-03f54b322a44/40983932770.pdfIn PDF document text
    • https://s3.amazonaws.com/baxegezivumi/96716046869.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9237d768-56e5-4cb5-812c-ff6b72621bfd/belufaj.pdfIn PDF document text
    • https://s3.amazonaws.com/jedaxopopuko/wasazekabudodasid.pdfIn PDF document text
    • https://s3.amazonaws.com/dixaleko/oxford_picture_dictionary_3rd_edition_free_download.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_off0000ca9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA9B 5328 bytes
SHA-256: e6d24ad4ab7f4b75caac402406edbb33fc2eaa65dff7b3c19c8f1ad85560d163
font_01_sfnt_off0000dca1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCA1 10016 bytes
SHA-256: 1f96e225a78e1070b55e594160ff642f569e0c1433dc0731cf70641afaacb736

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