Malicious PDF — malware analysis report

Static analysis result for SHA-256 6dd6f3709c4b8045…

MALICIOUS

PDF

78.4 KB Created: 2021-03-15 09:11:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5122be95c9c3fa4768be1d93d7f50c5f SHA-1: 232d88707b3b30bd7f4086bae30b329b068583db SHA-256: 6dd6f3709c4b8045079af561a55431b3bf6490fee221cb05201d996e71b6aec0
96 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, specifically identified as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, likely intended to redirect the user to a phishing site. The document body, though heavily obfuscated, contains metadata suggesting it was generated by wkhtmltopdf, a tool sometimes used to create malicious PDFs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://resalured.ru/123?utm_term=archero+hero+mode+guide
    • https://cdn-cms.f-static.net/uploads/4381544/normal_602539a9768e9.pdf
    • https://cdn-cms.f-static.net/uploads/4408704/normal_6023f3690a8c1.pdf
    • http://bullbananavannaone.xyz/guided_reading_level_definition6xdj9.pdf
    • http://gesetaxoxu.sportsontheweb.net/65315618017.pdf
    • https://cdn-cms.f-static.net/uploads/4385198/normal_60176b1ef0e97.pdf
    • https://static.s123-cdn-static.com/uploads/4443608/normal_5ff81d9d9d676.pdf
    • http://sale-siberian-force.online/703769502091p071.pdf
    • https://static.s123-cdn-static.com/uploads/4383798/normal_5fe4bb596665a.pdf
    • http://dehydratedoriginalgoodness.com/wozup7x1qd.pdf
    • http://nebofonuve.mywebcommunity.org/45388114784.pdf
    • http://dexuposi.sportsontheweb.net/animorphs_book_1.pdf
    • http://tiriruno.sportsontheweb.net/71199401975.pdf
    • https://cdn-cms.f-static.net/uploads/4450889/normal_601afe30274e6.pdf
    • http://begiguvok.iblogger.org/xubonedidiramotapigo.pdf
    • http://pro-konditer.com/articles_esl_game264mv.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://1dfef493-bba3-4db0-89f7-7cef958ceea2.filesusr.com/ugd/3dbeb3_013f1c88030b48b2888d0bf95b152a96.pdf?index=true
    • https://d8d078ea-10ec-4787-8e21-ef6e32b87a24.filesusr.com/ugd/8f6098_c59786d4900048308d81289568442969.pdf?index=true
    • http://zumijuxuv.epizy.com/95031009907.pdf
    • http://xelidev.rf.gd/why_does_my_makita_battery_flashing_red_and_green.pdf
    • https://5e0c4d4d-41f9-428c-9564-b93e7cff6769.filesusr.com/ugd/510691_2e0fb3c978104bb3afad1ecb911c7fab.pdf?index=true
    • http://fidikaxano.myartsonline.com/16936516621.pdf
    • https://e1cd7dcf-8988-4be8-9b1a-722367337987.filesusr.com/ugd/6203b9_2de5b33a86b3410b8fabc35ce1cb0c44.pdf?index=true
    • https://28a90398-13b1-4b58-b54c-ed045a6bddf2.filesusr.com/ugd/7e9e1f_4af78d8243dd4c8b94ec6cdbf8cb14e7.pdf?index=true
    • http://vevosewis.rf.gd/pugenilurot.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f3ba.bin
6a40e7574ee5e6a68c425c1b860fc66f3b12544084cb13a06bdc35218449ade9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF3BA 4924 bytes
font_01_sfnt_off0001044f.bin
85e1b16f206b2736e868424efb764ea8ed394125d74c97f13270d3517a660f20		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1044F 11136 bytes

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