Malicious PDF — malware analysis report

Static analysis result for SHA-256 2921dca1e56b6682…

MALICIOUS

PDF

80.5 KB Created: 2021-01-04 01:02:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 69a6c0e0dd7bf91bfa7c6bdaad521cfa SHA-1: e2694b908da065b65cf694a0d42b4146a2adc649 SHA-256: 2921dca1e56b6682c47a8f33a647ce7e0be479c72c23e3243b4da36a300ef1fb
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 URI pointing to 'trafffe.ru', which is likely used to redirect the user to a malicious site. The document body, though heavily obfuscated, contains metadata suggesting it was generated by wkhtmltopdf, a tool often used to create malicious PDFs.

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://trafffe.ru/123?utm_term=diario+la+capital+de+rosario
    • https://cdn.sqhk.co/bojojiweg/IBjfQgd/gomogurudifusivaxiwopi.pdf
    • https://cdn-cms.f-static.net/uploads/4456671/normal_5fd28c0e09814.pdf
    • https://static.s123-cdn-static.com/uploads/4369330/normal_5ff17165304e8.pdf
    • https://cdn.sqhk.co/nalujujoso/hghciiJ/wifi_analyzer_channel_ratings_iphone.pdf
    • https://static.s123-cdn-static.com/uploads/4467601/normal_5ff031c6a5c4e.pdf
    • https://cdn.sqhk.co/vozofugova/iiXHigF/real_car_parking_parking_master_mod_apk_an1.pdf
    • https://cdn-cms.f-static.net/uploads/4379854/normal_5f968c4f1dbef.pdf
    • https://cdn.sqhk.co/peluxisomex/heW6jcZ/veito_blade_heater_review.pdf
    • https://cdn.sqhk.co/vopufepivipe/hggjugj/61611274683.pdf
    • https://cdn.sqhk.co/xulawajikigi/S7K3uon/fozabuluwageb.pdf
    • https://cdn.sqhk.co/fejavegiwo/igeVRjb/rocket_launch_florida_november_2020.pdf
    • https://static.s123-cdn-static.com/uploads/4385412/normal_5fc666a021a0b.pdf
    • https://static.s123-cdn-static.com/uploads/4490515/normal_5ff0150632e91.pdf
    • https://static.s123-cdn-static.com/uploads/4489979/normal_5fc895460fd0f.pdf
    • https://cdn.sqhk.co/salenasova/agcigI3/kinenezodidaf.pdf
    • https://cdn-cms.f-static.net/uploads/4475716/normal_5fc066c7a136a.pdf
    • https://cdn-cms.f-static.net/uploads/4426424/normal_5fe9ea51274ab.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee98.bin
6a02a0f6e757e981fbb03c62a0deeef74c4d5a9169624a16f0e3df4dc9a3f89e
pdf-font-stream PDF embedded font (sfnt) at offset 0xEE98 4748 bytes
font_01_sfnt_off0000fec9.bin
66d3c4288bc94ffa12e1eb9a41cb7e399493d24799d95b7fae1a7f4e62dbbb39
pdf-font-stream PDF embedded font (sfnt) at offset 0xFEC9 11876 bytes
font_02_sfnt_off0001259a.bin
7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71
pdf-font-stream PDF embedded font (sfnt) at offset 0x1259A 4324 bytes