Malicious PDF — malware analysis report

Static analysis result for SHA-256 734e2174c6a2d230…

MALICIOUS

PDF

74.8 KB Created: 2020-12-25 05:49:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2f8425ea4b3c1000bc56b1edb132b793 SHA-1: d6fa5e81405485ab48b926610d76e9d4f21808ba SHA-256: 734e2174c6a2d230f6cdcce2e5786a1d343af3d8f085de76e9152787fda8f78d
96 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. An embedded URI points to a URL that suggests a lure for downloading software, likely to be malicious or unwanted. No scripts were extracted, but the presence of external URIs and the detection signatures suggest a phishing or trojan distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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=music+volume+equalizer+pro+apk+free+download
    • https://cdn-cms.f-static.net/uploads/4384640/normal_5f9e8f3056f16.pdf
    • https://cdn-cms.f-static.net/uploads/4422373/normal_5fa5efb748fb8.pdf
    • https://cdn-cms.f-static.net/uploads/4375909/normal_5fc2f260c4038.pdf
    • https://cdn-cms.f-static.net/uploads/4378157/normal_5fc0b24ef328a.pdf
    • https://static.s123-cdn-static.com/uploads/4462066/normal_5fe18c12c7744.pdf
    • https://mufisifarugevap.weebly.com/uploads/1/3/4/5/134595961/wetagenopamit_tejopewifu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/wujodibu/59094733916.pdf
    • https://s3.amazonaws.com/rejiner/11463036005.pdf
    • https://s3.amazonaws.com/bajapovogam/59125850834.pdf
    • https://s3.amazonaws.com/jufowokedunod/37645863350.pdf
    • https://s3.amazonaws.com/tonemakopinibem/rejukipaxuwig.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_off0000d995.bin
00c6ff54b9e3d34b01e6125fcd54b2c4013094adc386f40b16ddef99ebe62459		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD995 5500 bytes
font_01_sfnt_off0000ec4f.bin
b4a537553a2adf4a91741d317be475ca1630ae698ec68c4e62e72e29363b8cae		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEC4F 10432 bytes
font_02_sfnt_off00011015.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11015 4324 bytes

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