Malicious PDF — malware analysis report

Static analysis result for SHA-256 c4c5787de23cb677…

MALICIOUS

PDF

69.2 KB Created: 2020-12-20 17:43:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: b9523978c1fc60df71f77fa7e03b5be9 SHA-1: 35a45c5b4564a4337d84740999e279b2b2461b5c SHA-256: c4c5787de23cb677d29f72f1aff8750e5270b9137b239ff2d25f3b459534bea5
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to 'traffking.ru', which is likely a malicious domain used for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and the presence of external URIs suggest an attempt to redirect the user to a harmful site, aligning with spearphishing tactics.

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
  • 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/strik?utm_term=puerto+rican+currency+to+naira PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4450248/normal_5fc7d1e84fb05.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379043/normal_5f934e02e8c92.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378165/normal_5fbf0ed34703f.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/09290fbd-7fea-46b5-bdfc-0f09a2ebb00e/runib.pdfIn PDF document text
    • https://s3.amazonaws.com/vitelitubovuluj/60794758363.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b79aa358-5720-4756-8fce-5cc3a5077208/the_hollywood_parents_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/feae8906-6bb0-4bbf-b1de-e822ba72fd5e/pokemon_3ds_apk_download.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe12f62dd96f5918b62d74/1606292214737/85665464112.pdfIn PDF document text
    • https://s3.amazonaws.com/jixeremipet/motor_accidents_compensation_act_guidelines.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fde97c9d0ff57695e6cefc3/t/5fdf36385809ae34340b3ff6/1608463931464/patizubup.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/87c2f858-d697-4753-82a4-fe5c39aecabb/75286427746.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ec23dd7f-e6fd-43f6-86e7-9b4cc461545f/pajofitabinevonetanemogi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/79b2be7b-5029-41a7-b8ea-26fe4821d7f0/89082872559.pdfIn PDF document text
    • https://s3.amazonaws.com/daxemo/22802814574.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_off0000d389.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD389 4688 bytes
SHA-256: baa388e0144c12c94b5ce52bba9b25f23a9f5c217a3e85617a1f9b89ce1f4f92
font_01_sfnt_off0000e392.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE392 10940 bytes
SHA-256: c41493eeca4a37e165fffb3277d7748c81f34b97d6874886a4e7a028f55adc40

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