Malicious PDF — malware analysis report

Static analysis result for SHA-256 bff46fe80065eb99…

MALICIOUS

PDF

71.2 KB Created: 2021-01-02 07:15:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 44e327263b26c93a5e213aa14514fcc9 SHA-1: 509cc6896c7bc54b9b8230ea390ec26b61a9c254 SHA-256: bff46fe80065eb9968ae0d2b86f2a38dadbd889e6e0d64b8aaef29448a7cc3d7
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with a high risk score. It contains an embedded URL pointing to 'traffnew.ru', which is a strong indicator of a phishing or malware distribution attempt. The PDF structure and metadata suggest it was generated by wkhtmltopdf, a tool sometimes used to create malicious documents.

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://traffnew.ru/123?utm_term=not+throw+away+your+shot PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4476437/normal_5fb56c4c9660c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385207/normal_5fc6c18d99d54.pdfIn PDF document text
    • https://cdn.sqhk.co/zafupusapun/hniaqi4/89554316660.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421970/normal_5fa2b37281c35.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387816/normal_5fe4c8583dce9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426971/normal_5fbe67745abb7.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/falufusu/nibugowozipawubemilaka.pdfIn PDF document text
    • https://s3.amazonaws.com/bufexa/wwe_shield_theme_music.pdfIn PDF document text
    • https://s3.amazonaws.com/bejeseja/handwriting_worksheets_printable_for_free.pdfIn PDF document text
    • https://s3.amazonaws.com/mokuwanibof/29578482317.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/92592f08-babb-4dac-8991-78af35a0ab9e/44868494604.pdfIn PDF document text
    • https://s3.amazonaws.com/guxosa/past_simple_and_past_continuous_tense_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/visagogijulep/wefivero.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8c344ff9-65ee-429b-897f-b5bc942db7b7/sirez.pdfIn PDF document text
    • https://s3.amazonaws.com/muxegeza/54736620365.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dbef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBEF 4904 bytes
SHA-256: e559611d6141ecc245b1a7b9020da001cdfe8c472f848e90c3c6947e5d4b48b4
font_01_sfnt_off0000ecb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECB3 10316 bytes
SHA-256: 7ba0d901a9ca2f4907d6288113143b9e5ce32cb3f1007b2a23f2580b89e456da