Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5af1019c165f513…

MALICIOUS

PDF

73.1 KB Created: 2020-11-30 08:51:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: f045b757a870b84a06d6220eec023249 SHA-1: 1b6246aacd850fe99d4197e0e9ed27b6bc7dff57 SHA-256: c5af1019c165f513374c544af615bd6e5711bd729156f1a03d5e3df17f8ee32b
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URI pointing to a suspicious domain, 'trafffi.ru', which is likely part of a phishing or malware distribution scheme. The ClamAV detection and ML classifier strongly indicate malicious intent, classifying it as a phishing trojan. The document body, though heavily obfuscated, suggests a lure related to software downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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/aws?utm_term=sql+server+2014+evaluation+version PDF link annotation
    • https://xaluwidadi.weebly.com/uploads/1/3/4/8/134860769/rifewax_zivazatijisow_vileledibadatat_bodum.pdfIn PDF document text
    • https://disaxugotusineg.weebly.com/uploads/1/3/1/8/131871710/7367357.pdfIn PDF document text
    • https://kalulexo.weebly.com/uploads/1/3/4/6/134661683/jakufojojup.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386606/normal_5f8c8e26abbeb.pdfIn PDF document text
    • https://natizupasa.weebly.com/uploads/1/3/1/4/131437725/6229122.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/novifamigot/impulse_ellen_hopkins_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2c092d4e-aaca-4830-be3a-90230b0a635c/implement_or_gate_using_nand_gates_only.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/92b6b66c-e4b0-4217-90ac-a645fb4723e1/96052717752.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/90b9f786-56eb-4e56-811b-753d1b64cb69/12149529078.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c5a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC5A1 5384 bytes
SHA-256: 718d51c3c8342c156473cec5ce444699a178db4e76d4f1fb5bc1dc14be762a72
font_01_sfnt_off0000d811.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD811 11204 bytes
SHA-256: bf396329470235254d01fbe57ca87d6c9283e1e33ffaefa25151fe4c21564427
font_02_sfnt_off0000fe70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE70 17368 bytes
SHA-256: 5e4976231aa584574b6ab12a53754fc28d219b610a2d1fa4e986fc51165a9e17