Malicious PDF — malware analysis report

Static analysis result for SHA-256 880db122ad1dac6f…

MALICIOUS

PDF

91.2 KB Created: 2020-11-11 20:32:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 829cd7c6797666c1b8f3bbeb812f9fbd SHA-1: e37cd4cf24b97c20fbe630526caa42e188c4b19e SHA-256: 880db122ad1dac6fcf7942e9b64e75befd201fae5494ada676bef7a9482c02db
96 Risk Score

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 URL pointing to 'trafffi.ru', which is likely used to host a phishing page or download a second-stage payload. The PDF structure and embedded content suggest it's designed to trick users into visiting the malicious link.

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://trafffi.ru/strik?utm_term=puntos+cefalometricos+de+ricketts
    • https://cdn-cms.f-static.net/uploads/4470222/normal_5fa4c3cca16c2.pdf
    • https://cdn-cms.f-static.net/uploads/4365653/normal_5f91aa774b087.pdf
    • https://cdn-cms.f-static.net/uploads/4366365/normal_5f96709e39331.pdf
    • https://cdn-cms.f-static.net/uploads/4385847/normal_5f912b5a4dfab.pdf
    • https://cdn-cms.f-static.net/uploads/4417213/normal_5fa7142fb4d97.pdf
    • https://cdn-cms.f-static.net/uploads/4427509/normal_5f9f1bc99af7c.pdf
    • https://cdn-cms.f-static.net/uploads/4372987/normal_5f964c1cec0b8.pdf
    • https://cdn-cms.f-static.net/uploads/4446511/normal_5fa8f24a5ae7d.pdf
    • https://cdn-cms.f-static.net/uploads/4365600/normal_5f9d126160bf6.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/tujeviwakirawu/tojeturupi.pdf
    • https://s3.amazonaws.com/bitajemisajoz/developmental_biology_11th_edition.pdf
    • https://s3.amazonaws.com/fuwenoxuzasila/abstract_reasoning_test_4.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011a38.bin
53c99de320e738c3b15aeadbe170d6e9ed5470e40eb69ca238817d9b2211a4ed		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11A38 5116 bytes
font_01_sfnt_off00012b7e.bin
c72ddf26c121a45c56fd8eb0f3dc12f1d57525a86529f92859843447fc4716f2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12B7E 10776 bytes
font_02_sfnt_off00014fbd.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14FBD 4324 bytes

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