Malicious PDF — malware analysis report

Static analysis result for SHA-256 250b5262351ff2c1…

MALICIOUS

PDF

68.8 KB Created: 2020-11-17 11:43:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 639ce7ad118442fe95bcfb23a418920e SHA-1: 6d2662160c04cd667af76d6cb9b9d99bd1543538 SHA-256: 250b5262351ff2c12c3f21dd3b7f8ca6bede9d38492ecfc31db8361c493e8ee1
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 detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to 'traffking.ru', which is likely a phishing or malware distribution site. The document body, though heavily obfuscated, suggests a lure related to 'Cal osha construction safety orders', aligning with phishing 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=cal+osha+construction+safety+orders PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4374517/normal_5faac2c2bf54a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366377/normal_5faa359ce4ef3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409243/normal_5fb283d90ba7d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410674/normal_5fa9026025bd8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473432/normal_5fa4f03a885f4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369766/normal_5f8a13c270386.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461232/normal_5fa5c780e98d9.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/91da533d-754d-4fac-918e-d9a5b71e7bb5/87490604499.pdfIn PDF document text
    • https://s3.amazonaws.com/xebareto/gurevud.pdfIn PDF document text
    • https://s3.amazonaws.com/xonobijikivo/edugains_kindergarten_report_card_comments.pdfIn PDF document text
    • https://s3.amazonaws.com/bidurudilidujug/counter_strike_cheats_download.pdfIn PDF document text
    • https://s3.amazonaws.com/viromibukoleliw/shadow_health_health_history_answer_key.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4a808b90-2f68-4a67-862e-f8e90d779dce/jagikasaleroseke.pdfIn PDF document text
    • https://s3.amazonaws.com/memul/wataxu.pdfIn PDF document text
    • https://s3.amazonaws.com/vuzufexarevima/zawibesewubepakif.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8c0ba9c4-adf5-4160-a50d-296e14edc8f5/13307749271.pdfIn PDF document text
    • https://s3.amazonaws.com/soxukowotomaj/37242938497.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_off0000d317.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD317 5116 bytes
SHA-256: 83e9980e05cd1e49c3c4b0daf42cefa8f176e8cc6239d4c6d7008a56b098cee9
font_01_sfnt_off0000e47a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE47A 9756 bytes
SHA-256: 2a3e8bff7b2291bcf2da0c55f108ebac1ce224829ce38591c65a3703c0624d01

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