Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3290638e9849400…

MALICIOUS

PDF

60.9 KB Created: 2021-01-16 00:12:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 212e8daffe4602117bad6d3bd0419cf1 SHA-1: 04db367def402a20c22281050c9e16b87d60de0d SHA-256: e3290638e9849400e26bc110c4c5e87bf11818c4ce280334adf08874dc1619ba
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URL that directs users to 'traffset.ru', suggesting a phishing or malware distribution attempt. The document body, though heavily obfuscated, contains metadata related to wkhtmltopdf and a creation date, which could be part of a lure to appear legitimate.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://traffset.ru/123?utm_term=abaqus+6.13+documentation+pdf PDF link annotation
    • https://site-1167961.mozfiles.com/files/1167961/all_goals_apkpure.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414176/normal_5fad9e514e720.pdfIn PDF document text
    • https://site-1083884.mozfiles.com/files/1083884/xiaomi_mi_9_android_10.pdfIn PDF document text
    • https://site-1178351.mozfiles.com/files/1178351/13296822217.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454668/normal_5fce0bf9c38d5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408713/normal_5f9be33a2fa32.pdfIn PDF document text
    • https://site-1194448.mozfiles.com/files/1194448/pikep.pdfIn PDF document text
    • https://site-1176840.mozfiles.com/files/1176840/mac_powerpoint_timeline_template_free.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/vigevot/67717052575.pdfIn PDF document text
    • https://s3.amazonaws.com/sakaburepagase/online_translator_english_to_malayalam.pdfIn PDF document text
    • https://s3.amazonaws.com/lomuper/86190049967.pdfIn PDF document text
    • https://s3.amazonaws.com/dusubonifu/bugizasuboxijenur.pdfIn PDF document text
    • https://s3.amazonaws.com/tevigotu/dupuvo.pdfIn PDF document text
    • https://s3.amazonaws.com/napoledunadigo/puzufadunefegesuv.pdfIn PDF document text
    • https://s3.amazonaws.com/bovenotojitowe/iso_13485_medical_devices_a_practical_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_off0000b2a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB2A6 5828 bytes
SHA-256: 1fb534360af7e2b5a5dacbe2a334971477e7c6b5979a3b49d090f0d9dad87226
font_01_sfnt_off0000c675.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC675 9432 bytes
SHA-256: a70fc7b3f5a7f55eb19601dbd5afb46bba6beec711008daf604931cebf2bfa36

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