Malicious PDF — malware analysis report

Static analysis result for SHA-256 90ab2abc92e39bbb…

MALICIOUS

PDF

74.4 KB Created: 2020-12-24 01:18:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 31576694491429bd2410fe4e5f39580f SHA-1: 1853cfa8e58adf8e0df101bb9d8a794b8bde4f36 SHA-256: 90ab2abc92e39bbb625fd2be64ad35dccb2bdc8a3f2c3f222a981dc7fdae7dde
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URL pointing to 'trafftec.ru', which is likely part of the phishing lure. Although no scripts were explicitly extracted, the PDF structure and embedded URI heuristic suggest an attempt to redirect the user to a malicious site, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://trafftec.ru/strik?utm_term=game+booster+launcher+screen+recorder PDF link annotation
    • https://cdn.sqhk.co/zimevegi/RQS8R9z/62914858797.pdfIn PDF document text
    • https://cdn.sqhk.co/ratijojitud/5jdYqZy/34730634490.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4474176/normal_5fdf14dbb46e8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416671/normal_5f9b41f99ce7e.pdfIn PDF document text
    • https://cdn.sqhk.co/ratugetaj/jfjfiaw/31310845828.pdfIn PDF document text
    • https://cdn.sqhk.co/guletema/9jeibhi/download_hotel_story_resort_simulation_apk.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/a0bdc87e-168c-4415-bd8b-a2045645d98d/dowusekavogu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3839ab00-5bf9-462e-98ec-6e21f3b0ec73/22225974569.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7de325ca-5271-4a2e-b9c8-c8c78a5a92f2/mokupiditu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2627b60e-0a5c-45cc-9332-489fb17b4117/we_believe_web_sadlier.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/722438fc-c61a-4e29-8729-5b5f0342ca41/puzeriwe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cf702a2f-aaef-4ca7-bfdb-7a95a89deb81/tinder_gold_free_trial.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f7da661f-e353-4696-81dd-8e302020cd59/sesanimasorurasesotiguwi.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d8bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8BC 5184 bytes
SHA-256: a9e3c2021432f584f315c5a6d675f0dce8f86772f72eb8ceed20817b53b9cd6e
font_01_sfnt_off0000ea28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA28 10504 bytes
SHA-256: e7777c6391c814b6bf47d5101d82a85876d3da6f002debd811de7ef29e90fc3d
font_02_sfnt_off00010e33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E33 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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