Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b1751a5fedcec42…

MALICIOUS

PDF

70.1 KB Created: 2020-12-16 03:51:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 73c9dd187f8ffcb32c3eb62ba25213a0 SHA-1: bcd02013fbc7798af7c205f5378081aef4fa282e SHA-256: 0b1751a5fedcec42ad7f859a71112e1d45b9bc3b4bb5f58d43a79e9c8ef580ad
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, specifically identified as a phishing trojan. It contains an embedded URL that directs users to a suspicious domain, likely to host a malicious payload or phishing page. The document body, though heavily obfuscated, appears to be a lure related to chemical kinetics to trick users into visiting the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://traffine.ru/strik?utm_term=what+is+zero+order+reaction+in+chemical+kinetics PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4373770/normal_5f89820f1e184.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450519/normal_5fb5630a69ac7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408995/normal_5fc24ed778f4c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc0e0f3f7cf8c75402ad020/t/5fc15ef464571256546f433d/1606508277015/xulaxubikukipuge.pdfIn PDF document text
    • https://s3.amazonaws.com/bifadiwuwileji/sims_4_apk_hack.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a8a5d3a9-9eae-4435-8bc3-3106a1133ff6/8624771821.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf493cf3de5e49b55a4fd0/1606371645083/cardinal_choice_insurance_plan_2.pdfIn PDF document text
    • https://s3.amazonaws.com/xezujuxoz/epic_games_launcher_fortnite_battle_royale.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ed5694a3-dacd-41fe-aba7-b5bf4e5b0dbe/23329235911.pdfIn PDF document text
    • https://s3.amazonaws.com/pazifetanegapu/babylon_mystery_religion_1966.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe205de18c5c478ec48c87/1606295646136/50625294135.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbdf48018e72e5fdb9c2da3/1606284420781/zazegi.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_off0000d398.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD398 5308 bytes
SHA-256: 06da6cc2bdb005f747525a35ae1530bc88c46c910c1fa5463933c22355a41ad3
font_01_sfnt_off0000e589.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE589 11156 bytes
SHA-256: 6b06d3086bf72928c09e423a8009c2ff796c11feb30b0cf0da7afba8c9af0367