Malicious PDF — malware analysis report

Static analysis result for SHA-256 700f343be0c3d8fe…

MALICIOUS

PDF

74.0 KB Created: 2020-11-19 23:39:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 5c2d7f713f0c71e455838b358554bf16 SHA-1: 3c104793210394180b68e406a74d5fd6733cec21 SHA-256: 700f343be0c3d8fe56121aaaaa976c796fef42cf4bce70441862d39eafc88a37
96 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains an embedded URL pointing to 'https://trafffi.ru/123?utm_term=ap+lang+vocab+words', which is likely a phishing site. The presence of PDF-specific heuristics and the overall detection score support the classification as a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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/123?utm_term=ap+lang+vocab+words PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4410432/normal_5f9f04469f140.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371495/normal_5f8a09ba2d1a6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494893/normal_5faa5826c8cca.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494433/normal_5fb46fd6384a8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375891/normal_5fa00c355da4a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368246/normal_5f8d6d817c6d3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392659/normal_5f92d926db9dd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377095/normal_5f8c1427371d5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382190/normal_5f8bd9808fefe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387933/normal_5fb3d8221b817.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/tometubufimopim/etheria_film_night_2019.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7f90c04d-be4c-42f5-8ecb-79a3ed5bad92/17751971337.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1d8e9217-d1e2-4dda-b491-8a88cbdedded/tu_y_yo_piensalo_frases.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_off0000e4ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4AE 5520 bytes
SHA-256: 5c9215e1d7afc5e32e0b9b9fdb480d8f7f97deca826e8d64c95d3687445bbc9a
font_01_sfnt_off0000f790.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF790 10652 bytes
SHA-256: cd0b4731762f733c2ae57b2f97838536c20a7bfbdc52b4f6a72e7b85de155e92