Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6bf8e34a838381f…

MALICIOUS

PDF

66.9 KB Created: 2020-11-09 17:44:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 1bc447ce2a7ded53bedb338b107d3581 SHA-1: a3f3718fa2b83645430cf03d7d8550adeb5b54a6 SHA-256: c6bf8e34a838381f1b071fa8893dfe7a540db6a39b5ccd6c63a22c421b33fd57
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://traffking.ru/123?keyword=animation+vs+animator+2+player+game'. This URL is likely used to redirect the user to a phishing or malware distribution site. The ML classifier also strongly flagged this PDF as malicious. While no scripts were extracted, the presence of a malicious URL within the document body strongly suggests a phishing or social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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.
  • 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://traffking.ru/123?keyword=animation+vs+animator+2+player+game In PDF document text
    • https://cdn-cms.f-static.net/uploads/4425217/normal_5f99d7f910fac.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/a7b08eee-58fc-455c-a093-0ca1329cb05b/renanusugole.pdfIn PDF document text
    • https://s3.amazonaws.com/poresi/ffxiv_crafting_rotation.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8728a6ab-2327-4c2a-aa83-e720477fe2b7/overworld_labs_games.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/200d0576-79dd-4a44-8e0b-cabff153611e/72495023144.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b9ad520c-833d-49b3-a3ac-b0af4465edf6/sitelipixawopazodofutufiw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a38a8cd0-878b-485e-b9b9-c829c50b7a29/dudirolunifapunate.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/270fafef-cc65-4f7a-96c6-ca9cd2b8ce5d/67855230523.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/171754e7-f129-4967-85fb-ccb5545159fd/dukosefe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/012e5047-6a2f-4e19-9127-5df127b3bccf/8575622079.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/07970031-db5c-45dc-83c7-85aa87d2f267/82483161849.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/00fee2b6-6564-4bf7-ab45-a4a65b965e4f/81364807647.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/23142a9e-c1e8-46da-bffe-7aa79514c9ce/3768019088.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/31402f28-a964-4fec-ac7e-8789768d6c0a/sadagexowikapogere.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/30f71296-3c63-43ff-a21c-78fe584eb38c/ruvevowixarevikalodatid.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/32bfdb3c-1afe-478c-8c34-38abc514f6bf/nrg_racing_seats_miata.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_off0000c92a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC92A 5424 bytes
SHA-256: b216da5d5f0aad80955f7e4213b37c4b94103d1e10474821c6692e03edd5e8ae
font_01_sfnt_off0000db92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB92 10324 bytes
SHA-256: 893e985a7f910d7b90218eb791ca5adbd98cbc0252984d746dcf766e0fcf137a

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