Malicious PDF — malware analysis report

Static analysis result for SHA-256 e08c014ee93561b8…

MALICIOUS

PDF

69.9 KB Created: 2020-12-24 10:25:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 63a8d99a46446908144d0d99fd574860 SHA-1: 74c492455b2d7429721ddfd2e896ce6f1a21aee9 SHA-256: e08c014ee93561b833f24f1968063af19c07282c5c628f5526e167b1f43c9ff5
96 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URI pointing to a suspicious domain, traffset.ru. ClamAV and an ML classifier flagged this PDF as malicious, specifically as a phishing trojan. The document body, though heavily obfuscated, appears to be related to 'List of non ly adverbs', suggesting a lure to disguise the malicious intent.

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://traffset.ru/123?utm_term=list+of+non+ly+adverbs PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4375075/normal_5f938adf921ca.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471992/normal_5fbaaa164cdf3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366381/normal_5f874239cbfeb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482638/normal_5fcba3b952bcd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4458621/normal_5fc41503300b6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393364/normal_5fdeae8e71075.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384817/normal_5f9200cb9efcc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368745/normal_5f8edae818282.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402724/normal_5fe205994d2d8.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/xutomoxu/58473190106.pdfIn PDF document text
    • https://s3.amazonaws.com/zafaronivaj/tolipujufudumegu.pdfIn PDF document text
    • https://s3.amazonaws.com/duzexefemosaxe/gordon_east_school_uniform.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/33b7f1dc-451f-405b-a5b5-8b6b84a0d12a/the_care_and_keeping_of_you_2_free.pdfIn PDF document text
    • https://s3.amazonaws.com/mutirexa/kovalonu.pdfIn PDF document text
    • https://s3.amazonaws.com/xabalaru/avaya_announcement_wav_format.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cef39d61-be3d-4cf5-b161-165d9e46b4eb/49198578944.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_off0000c630.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC630 3344 bytes
SHA-256: 35b8c412a29eb62591d254fdab0c37bb40569f5450b49e56c988efeff30f4c1d
font_01_sfnt_off0000d239.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD239 5144 bytes
SHA-256: 1d001c885cfdbc8ef9c14210f964a6cbb8c9ecb8804897d180d5643154496277
font_02_sfnt_off0000e3d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3D9 11436 bytes
SHA-256: 5d56acf7144365cd242cd1f8f936cad5f187cbebfdfdf228ffb29f4ccf1051f4

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