Malicious PDF — malware analysis report

Static analysis result for SHA-256 1320b23f5be55da5…

MALICIOUS

PDF

67.0 KB Created: 2020-12-24 07:39:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: b6d0c584272ad7de32e17c6f44139466 SHA-1: 361a1f3e8daea24e87889e9e70ecf6bb84cfc33d SHA-256: 1320b23f5be55da51ae28ff02e8dacfa2d16fa607afb7ec13ac095900b4869bd
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 specific detection name indicating it's a phishing trojan. An external URI pointing to 'trafffi.ru' was extracted, suggesting a redirection to a malicious site. The document body contains garbled text, but the presence of an embedded URL and the overall heuristics strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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=piano+music+tiles+2+free+music+games PDF link annotation
    • https://cdn.sqhk.co/duxajoje/MPoic6f/cute_acrylic_nails_for_10_year_olds.pdfIn PDF document text
    • https://cdn.sqhk.co/suwezuzifu/RDnrIKZ/bronze_age_comics_key_issues.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414169/normal_5fa58b3c27257.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372074/normal_5fc21210c9fac.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382965/normal_5f96b888a23a2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/9248cd24-6e84-4f78-85c6-52b4a8f3f27d/33014398189.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/39a98411-7f51-45f2-996f-b65e12d8e59f/image_editor_for_windows_7_64_bit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/40c96324-f080-4b83-949a-2c0cec6119bc/domilusuvokusurowajoxut.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2f837681-0c7a-4372-a83c-2f33a973bd7f/naruto_naiteki_kensei_r2_download_pc.pdfIn PDF document text
    • https://s3.amazonaws.com/jevopemosod/vedalam_hd_full_movie_in_tamil.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_off0000c951.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC951 5332 bytes
SHA-256: fb63be07cb2c1528d24b824e0a7286db36e36e2fd85f0cbd55958cb837a7386a
font_01_sfnt_off0000db66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB66 10476 bytes
SHA-256: 54dfd1c8fb1851b8e0fe2e74013ab9bbb8ce6ee8c3fee2ec7d20664560378999