Malicious PDF — malware analysis report

Static analysis result for SHA-256 140a13b5a96a0138…

MALICIOUS

PDF

68.4 KB Created: 2021-01-03 03:52:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 77b7c40f2a7dc045b3997f8b055a1337 SHA-1: 863e9aaf9141ae303f15f31e5fa1932d8efe242b SHA-256: 140a13b5a96a0138776439afe1ac0dcc9e0d303a44115c5f2ffffbad998d6def
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://gettraff.ru/aws?utm_term=msci+emerging+markets+fact+sheet'. This URL is identified as a known malicious redirector. The ML classifier also flagged the PDF with a high probability of being malicious. While no scripts were extracted, the presence of a malicious URL strongly suggests a phishing or malware delivery attempt.

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
  • 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://gettraff.ru/aws?utm_term=msci+emerging+markets+fact+sheet In PDF document text
    • https://kojemugolipoxo.weebly.com/uploads/1/3/4/7/134729864/ee4404c1a968.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368756/normal_5fb8dab1b1a3d.pdfIn PDF document text
    • https://bugekawimilu.weebly.com/uploads/1/3/4/5/134589579/radaxuzeko_zidewa_tufidon.pdfIn PDF document text
    • https://komibaxes.weebly.com/uploads/1/3/1/6/131606619/e026ac5a6e9b0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407070/normal_5fad98ad793ac.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372376/normal_5f88ded553196.pdfIn PDF document text
    • https://nifirasevaxo.weebly.com/uploads/1/3/4/7/134756957/1962331.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/4b066399-2f34-4114-8009-4915d7b0a321/lesson_9_3_composite_figures_answer_key.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/679fbced-91df-40f7-b4d5-30a794cdfcda/project_critical_path_analysis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7734cd58-6d30-43c1-bc5a-0b3048b98fac/tubakujin.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d8109377-b2d2-4e81-bf43-db89f1bf4374/where_to_watch_degrassi_for_free.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_off0000c1d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC1D2 5012 bytes
SHA-256: d50efdf753ef84da712e647b4a8720591c9f04f98d24a69a5b6776f2cfd9abaa
font_01_sfnt_off0000d2ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2AC 10692 bytes
SHA-256: 0a9e704fe3ff76796fa1674d45614c9ae1d50147eeb7706eecf5be451a579b7d
font_02_sfnt_off0000f739.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF739 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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