Malicious PDF — malware analysis report

Static analysis result for SHA-256 e304818fb4588095…

MALICIOUS

PDF

67.1 KB Created: 2020-11-11 12:11:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 53e81e0fb9dac5bcd2669bfa0c4374d3 SHA-1: 59df0719d7fef2258206d4d524916714c46a545d SHA-256: e304818fb4588095dfad0d5380a2f8ea4e5925fc451a0701ac983bc0e7901ee5
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 leads to a suspicious domain, likely intended to trick the user into downloading a payload or providing sensitive information. No scripts were extracted, but the presence of the malicious URL and the high confidence detection indicate a phishing or malware distribution attempt.

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://trafftec.ru/strik?keyword=unblock+super+mario+2 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4369506/normal_5f99affbe0394.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386347/normal_5f955a0da72e1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471081/normal_5fa571702a585.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/wovitiku/5_informal_ways_to_amend_the_constitution.pdfIn PDF document text
    • https://s3.amazonaws.com/rubidokezive/major_assumptions_of_self_care_deficit_theory.pdfIn PDF document text
    • https://s3.amazonaws.com/lurutopobi/68614275689.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/359a06a6-dba9-4b9e-a6b4-0c04b3ff1ee7/3255740310.pdfIn PDF document text
    • https://s3.amazonaws.com/xapota/viking_team_stats_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/gewuwasi/gatisivife.pdfIn PDF document text
    • https://s3.amazonaws.com/degisapemifa/7323670563.pdfIn PDF document text
    • https://s3.amazonaws.com/zomuzigo/queens_of_the_stone_age_drummer.pdfIn PDF document text
    • https://s3.amazonaws.com/dukexajuj/32435062582.pdfIn PDF document text
    • https://s3.amazonaws.com/lorifumofelu/wilamazi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5c4b2f4d-3fa8-419f-8dd3-132db91a40e2/46939139417.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_off0000cb39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB39 5408 bytes
SHA-256: d38480b247d5193962047efe6b84a731f863f739b1b3bd6f635bb01589092ca7
font_01_sfnt_off0000dd87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD87 10160 bytes
SHA-256: a67c1bc6288edbe7e1aacee8901b0b2d7b147920197f10c1bb7fbe6468c02c75