Malicious PDF — malware analysis report

Static analysis result for SHA-256 55dd096f0c7e463f…

MALICIOUS

PDF

67.8 KB Created: 2021-01-06 12:45:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: e80c2edd0ebfe123427fd3780276a5e0 SHA-1: 21ea708b04e2220eb0c50d6d7b90eab6571d2c77 SHA-256: 55dd096f0c7e463f9d5954b6d9d7b9465895515e8eea399ad63583f867ee973c
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file is identified as malicious by a ClamAV signature and an ML classifier. It contains an embedded URL pointing to 'traffking.ru', which is likely used for phishing or malware distribution. The document body, though heavily obfuscated, contains text suggesting a lure related to a 'wrong answer icon gif', indicating a social engineering attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://traffking.ru/aws?utm_term=wrong+answer+icon+gif PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4368493/normal_5fb935b5e4a33.pdfIn PDF document text
    • https://xemivigezeb.weebly.com/uploads/1/3/4/4/134481563/raxofibow_raxoviwumelanid_nonesegi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413705/normal_5fbf6bbdbded7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377717/normal_5f9e950ab9f10.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383573/normal_5f8ea0c8db0fc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405413/normal_5f9840a9d8e7c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409244/normal_5fc34d958d8c8.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/ragejufa/malayala_manorama_calendar_2019_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2f693779-51c4-48f8-850d-c0dde02a8211/23904184048.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d96c509d-761b-42c6-b077-e5f2550d2b96/periodo_prepatogenico_de_la_tuberculosis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/74293994-bd51-4944-88df-65db2800ef40/38275173609.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ab959a45-b46f-4e2d-9a2b-d039e54a31ad/25788150439.pdfIn PDF document text
    • https://s3.amazonaws.com/rupatojuko/trane_xl_824_thermostat_manual.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ca54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA54 5120 bytes
SHA-256: f2b73aa3fcff9639b96d112c8b4c996ad66435d9eddd9a371be0ae278eb659b6
font_01_sfnt_off0000dbee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBEE 11516 bytes
SHA-256: 08bb81cbba8fd72bfd10f6a76a685396450336615707d865454f854d635df1e7

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