Malicious PDF — malware analysis report

Static analysis result for SHA-256 65709ed1714dea6a…

MALICIOUS

PDF

163.7 KB Created: 2020-11-25 08:42:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: f8fd3f6fdedced81a4a0fb61e50201ae SHA-1: dd81e89db6d9f5a6cf055463fcf03600c9569a75 SHA-256: 65709ed1714dea6a0a7d7bae5f73e21833cb38bb71b4c7e1286154522e272c85
96 Risk Score

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 'trafftec.ru', which is likely a malicious domain used to host a phishing page or distribute further malware. The document body is heavily obfuscated and unreadable, suggesting an attempt to hide its malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://trafftec.ru/123?utm_term=fruits+basket+zodiac+rooster PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4499021/normal_5fb559b7014ae.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/3173d023-347c-43b2-9371-ef522b4672e8/luvokopojabusikupowuzo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7e1e1135-6622-41e1-8be0-1592a0ffa2f5/methanesulfonyl_chloride_density.pdfIn PDF document text
    • https://s3.amazonaws.com/retobifulipo/the_amazing_spider_man_1_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/begijufadi/molag_bal_skyrim_voice_actor.pdfIn PDF document text
    • https://s3.amazonaws.com/juzowilipi/fokoguxotobe.pdfIn PDF document text
    • https://s3.amazonaws.com/tesodagiwor/kupij.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/297b82db-22b9-4683-8b1d-7420205f40da/cobas_e411_lfc.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5dd9c46f-b6f8-44b9-a5e0-1b5988065a5a/42799778090.pdfIn PDF document text
    • https://s3.amazonaws.com/bejokazemur/retrevo_samples_supersonic_manuals.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/060ac3a9-03e2-4e46-af84-5b6302a07433/who_you_say_i_am_hillsong_lyrics.pdfIn PDF document text
    • https://s3.amazonaws.com/zubuwujoxom/sopujuv.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001fb12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1FB12 12752 bytes
SHA-256: c791c050226864fbcaf8ea1d8996925d3ba88884c11cf820e96039392d1b849b
font_01_sfnt_off000223e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x223E6 5112 bytes
SHA-256: 28976664516135d83d76773518d4e07ff867ecc8bf7f0431f5cfb268a577eea6
font_02_sfnt_off00023558.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x23558 4352 bytes
SHA-256: 80affed6bf7e00cd451a2d3cdc9995b5fa37e5ff615de59f267fa36ec903cede
font_03_sfnt_off0002437e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2437E 12144 bytes
SHA-256: 2e03fdcbd78d6b5de5f3ed85ca0ef9195731c6ab80b7ef4cb1df2c0bc6f973b4
font_04_sfnt_off00026bcc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x26BCC 16132 bytes
SHA-256: 60f53b17f7925ac1818ac9336ea58fd206fea48872b5377b70e6fb8114080afd

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