Malicious PDF — malware analysis report

Static analysis result for SHA-256 555e36343aed8b40…

MALICIOUS

PDF

105.2 KB Created: 2020-12-20 19:43:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: a04a54d965f7f59d4186390f450970f1 SHA-1: efda44e52d157551ee2ed50d0f2e518ce9a5ff0d SHA-256: 555e36343aed8b4054c6f7129fc79d6d5d9ed7cbcfed60d5c1f14ff019cc7c36
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://trafficel.ru/strik?utm_term=homework+now+rwb PDF link annotation
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://static1.squarespace.com/static/5fbffbf92e34347c703edab4/t/5fc261813c02f22b9d5a0ec0/1606574466405/68181128357.pdfIn PDF document text
    • https://s3.amazonaws.com/texifaxepag/weider_x_factor_bands.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fdf1455eb2b3030ab3bc75e/t/5fdf4834d85ca26442121e51/1608468543804/fsrh_iud_guidelines_2015.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fcecde6ad06677b0d276051/t/5fd0d3ec5efba8153b2d5f91/1607521260688/custard_ice_cream_recipe_without_heavy_cream.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc6438fbdb33045eee6a409/t/5fd00a663679834d723fec3a/1607469672181/4698655167.pdfIn PDF document text
    • https://s3.amazonaws.com/rujimidujek/80961635626.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c88f19ba-e99e-4fc7-abf2-f06ab0dce213/7114441984.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc7acc6a4492a057e24fcdc/t/5fce2db383d2ac65cc3d6025/1607347636076/glitter_phone_wallpaper_background.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/00e70016-582f-445a-958e-50e6368b982f/shaw_engineered_hardwood.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fab78504-ce6c-420d-8760-1d841a212202/35768630990.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5b2678139af037665e521/t/5fd07f633bcf75077a83e784/1607499619411/wechat_web_for_mac.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a027bfa1-1070-46c9-b517-4800cfce7c93/83640212396.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000155d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x155D2 4328 bytes
SHA-256: 1efd4384afde9b03f2eda9f5408e06f49fbb77373a68b6c5fb32af3b0cd4b4d0
font_01_sfnt_off0001645f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1645F 10752 bytes
SHA-256: 505f3dd4e3623cc2a86efa2b47c19c19e17f0315d919624ac1c452830c848bdd
font_02_sfnt_off0001881a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1881A 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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