Malicious PDF — malware analysis report

Static analysis result for SHA-256 b496ddcd5dcf6b26…

MALICIOUS

PDF

70.7 KB Created: 2021-02-19 21:28:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 1e930ff7f47f1047c0586cbc8b6bff33 SHA-1: 9804ddbf7f2872591603b2cb3bab931dd21940bb SHA-256: b496ddcd5dcf6b269f4dcd3d64bc8d1f24611a9690593590adf8b2df0b98d8ee
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URI pointing to a suspicious domain, which is likely intended to trick the user into downloading a malicious payload. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan. The document body, though heavily obfuscated, contains references to 'tank trouble swf' and 'wkhtmltopdf', suggesting a lure for a game or application, directing users to a potentially malicious URL.

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://jottigo.ru/wix?keyword=tank+trouble+swf PDF link annotation
    • http://cmb-societe.com/pupogigilode8pn4k.pdfIn PDF document text
    • http://probkin34.xyz/351349676473zlh4.pdfIn PDF document text
    • http://hookup750.website/semexufogozefafapadifatebkojya.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4466391/normal_600575a14116e.pdfIn PDF document text
    • https://cdn.sqhk.co/jafipago/bybkgiY/lopogoduteko.pdfIn PDF document text
    • https://cdn.sqhk.co/dakagugi/dmjhPG1/free_negotiation_skills_training_materials.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425483/normal_60098c32ef134.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368985/normal_5ff45465eb220.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450730/normal_5fcfaf6375d5d.pdfIn PDF document text
    • http://pestore.pro/please_find_the_following_information_below20bvt.pdfIn PDF document text
    • http://istra-backwater.ru/legipisadujh1la1.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/dowavelaxam/apache_ignite_vs_mongodb_performance.pdfIn PDF document text
    • https://s3.amazonaws.com/donarepemi/vajagure.pdfIn PDF document text
    • https://s3.amazonaws.com/daselex/formal_education_meaning_in_urdu.pdfIn PDF document text
    • https://s3.amazonaws.com/wixanarer/gregorian_chant_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/zobuwubedak/drayton_digistat_rf3_user_guide.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_off0000da58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA58 5008 bytes
SHA-256: a62c700325f692cde766f02b18e26c1814eb8ce132470efe4f7c72fe9037117c
font_01_sfnt_off0000eb85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB85 10024 bytes
SHA-256: 13a75a421c6ef455da8197059bf833fce039e4580d560231c59a7af08851be1c

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