Malicious PDF — malware analysis report

Static analysis result for SHA-256 93928b1ad9ff597e…

MALICIOUS

PDF

62.3 KB Created: 2020-12-18 03:26:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 5baf0e9682df437c08cc55ef003512da SHA-1: e9b0f926a11cf9c3700bf9a42f00705c3402dc77 SHA-256: 93928b1ad9ff597e0e7e4bf8e8bbee91418f5a8373f1f163a490d8a2de26f3d8
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file is a PDF document identified as malicious by ML classifiers and ClamAV. It contains an embedded URI pointing to 'traffking.ru', which is likely a phishing or malware distribution lure. The document body, though heavily obfuscated, appears to contain text related to a 'royal sovereign rsc qs1 manual coin sorter', suggesting a pretext for the malicious link. No scripts were extracted, but the PDF structure itself facilitated the embedding of the malicious URI.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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?utm_term=royal+sovereign+rsc+qs1+manual+coin+sorter+1+each PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4369179/normal_5f95658a45cb1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391315/normal_5f90ae01aeb8d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444104/normal_5faa21d264043.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413975/normal_5fd233663a0fd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372373/normal_5f8fe682954a5.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/0bd95933-d8eb-4cf1-9c2d-f8a178101c1a/nidodinovomujunuxodujowa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3a536708-8e4f-4328-b9bb-e8b7d07a1293/soup_and_salad_near_me.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/66629893-b8b2-4e08-94e2-1686c13db210/bogatopitobufof.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f6d4f920-0611-4437-ad1b-b322dfe97266/antm_1_wikipedia.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cf553379-3a23-4962-ace7-6ec090f87a34/63926104753.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7ed8a4e4-c230-41d9-abe1-efa5808087d7/26206894764.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/71a5dbf7-6de6-4a90-bddf-9361c65e0311/nabokojel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aef68a43-af0c-4851-9b01-7efc7d5fc9d2/74872576740.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_off0000b396.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB396 5560 bytes
SHA-256: 1d5e90ffbb5e0715d44f7ac4d06c1eb401499852efb9a4f9dcb1c1c15f55e27e
font_01_sfnt_off0000c66c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC66C 11332 bytes
SHA-256: 047d9ad80633c606881a68c9c6cc5c328b57cf98488d6f09f26665f04d999907

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