Malicious PDF — malware analysis report

Static analysis result for SHA-256 b51da98369676a79…

MALICIOUS

PDF

70.0 KB Created: 2021-01-07 21:59:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: ea48bd1608a8487b8f792999094b686f SHA-1: 25ee5c6f69394c2b2760924649702244c6752f74 SHA-256: b51da98369676a79247a0ad7f96d4c82904083969f2366ef6162fdc8a9e93841
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to 'traffine.ru', which is likely part of a phishing or malware distribution scheme. The document body, though heavily obfuscated, suggests a lure related to 'movies telugu app'. No scripts were extracted, but the presence of an external URI in a malicious PDF strongly indicates an attempt to redirect the user to a harmful site.

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://traffine.ru/aws?utm_term=movies++telugu+app PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4376599/normal_5f91eb97bf345.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4467927/normal_5fced2fe1a7a9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426550/normal_5fb8051cd0915.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420752/normal_5fba6b2c5cc3b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413986/normal_5fb5080ec65e9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4372955/normal_5fc5265940c25.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/henghuili-files/html_tags_list.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxutedi/lagu_bergetar_hatiku_saat_berkenalan_dengannya.pdfIn PDF document text
    • https://s3.amazonaws.com/gupuso/30444561136.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0f12dd3d-7f28-4f3c-a7d6-e1e29756e938/32327289469.pdfIn PDF document text
    • https://s3.amazonaws.com/nawosineromigi/49259690938.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/70175d5b-1715-45fc-9a4b-a0e254f6001b/dosefudu.pdfIn PDF document text
    • https://s3.amazonaws.com/tetazino/answered_prayers_the_unfinished_novel.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_off0000ca20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA20 4732 bytes
SHA-256: 9a34094e2dd2d1461d219eb6f542edea51b0cc89ab39ac9da08e852b56ca539a
font_01_sfnt_off0000da5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA5B 10236 bytes
SHA-256: 065895abb1a90dc6b6c72a5098376006a2eac70c076f6dab5734bc0a064f6d7c
font_02_sfnt_off0000fd7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD7D 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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