Malicious PDF — malware analysis report

Static analysis result for SHA-256 59f20c3c3d71a3ba…

MALICIOUS

PDF

76.5 KB Created: 2021-01-13 06:05:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ea3a27871f7f22b7072842ae5a9c2b04 SHA-1: 507413f26aa8eece93653a8db0eb722b6744a973 SHA-256: 59f20c3c3d71a3baa2e15532c1711e069d1faa9eaafcc96e1aad72e79e613a1d
96 Risk Score

Malware Insights

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

This PDF document contains an embedded URI that redirects to a URL associated with a boiler cost search query, likely a lure for phishing. The ML classifier and ClamAV detection strongly indicate malicious intent, with ClamAV identifying it as a phishing trojan. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it is designed to redirect users to malicious sites, potentially for credential harvesting or further malware delivery.

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://trafffi.ru/wb?keyword=radiant%20heat%20boiler%20cost
    • https://fetepidema.weebly.com/uploads/1/3/4/6/134684810/8012309.pdf
    • https://cdn-cms.f-static.net/uploads/4403428/normal_5f9a1d4f39f5f.pdf
    • https://site-1179301.mozfiles.com/files/1179301/cnc_lathe_speed_and_feed_calculator.pdf
    • https://cdn-cms.f-static.net/uploads/4471085/normal_5fba444a50c49.pdf
    • https://site-1180311.mozfiles.com/files/1180311/support_synonyms_words.pdf
    • https://gufobetatogeset.weebly.com/uploads/1/3/1/0/131069923/gitiguxejifuwag.pdf
    • https://static.s123-cdn-static.com/uploads/4488317/normal_5ff57dc1cea97.pdf
    • https://zovarufegurer.weebly.com/uploads/1/3/4/6/134625168/4771790.pdf
    • https://vogizezadu.weebly.com/uploads/1/3/0/8/130814341/3901177.pdf
    • https://site-1208113.mozfiles.com/files/1208113/translate_english_to_spanish_document.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/zuponefi/defefeluvanatos.pdf
    • 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_off0000e402.bin
b9cba5f657598fc473fdb7def89160554e259192a0de410bd59445e01e7e19ab		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE402 4964 bytes
font_01_sfnt_off0000f4ca.bin
fe830fd3d5b6aa160af9f67557132ded6ac9e8574bc4043667ee17c32e78f838		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF4CA 10108 bytes
font_02_sfnt_off00011765.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11765 4324 bytes

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