Malicious PDF — malware analysis report

Static analysis result for SHA-256 d29793c9e9284eeb…

MALICIOUS

PDF

74.6 KB Created: 2021-05-04 00:46:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 33686e8d9bb5bc5d9669231484e871e8 SHA-1: d512b200e368a465cebe304db9d3c7f1711fca70 SHA-256: d29793c9e9284eeb261a23eed744abfe53176549b001b32ebeafc09113eec07b
96 Risk Score

Malware Insights

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

The PDF file is detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains an embedded URL that leads to a website disguised as an engine manual, likely to trick users into downloading further malware. No scripts were extracted, but the PDF structure and embedded URI suggest a phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://vilenefex.ru/strik?utm_term=briggs+and+stratton+ohv+engine+manual
    • https://cdn-cms.f-static.net/uploads/4408586/normal_603c24d8e977f.pdf
    • https://cdn-cms.f-static.net/uploads/4406455/normal_5fe9ad35b58d7.pdf
    • http://rosipale.scienceontheweb.net/hindu_baby_girl_names_in_telugu.pdf
    • https://cdn-cms.f-static.net/uploads/4466368/normal_6041868fd74b3.pdf
    • http://gagefiwirimat.medianewsonline.com/21258719847.pdf
    • https://cdn-cms.f-static.net/uploads/4484807/normal_60450c22d391d.pdf
    • https://cdn-cms.f-static.net/uploads/4452373/normal_5fda90652e9de.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://juxudawalugevop.epizy.com/usgs_map_projections.pdf
    • http://petefedugekuk.rf.gd/what_is_classical_greek_art.pdf
    • http://sipanokule.onlinewebshop.net/wadifu.pdf
    • http://guxudapese.epizy.com/weapons_of_mass_instruction_free_download.pdf
    • http://gajefeni.rf.gd/koxikonemufuvagaje.pdf
    • http://motirovaribepok.rf.gd/539782617.pdf
    • https://s3.amazonaws.com/xisakazelelinim/posazepatemiwofufovog.pdf
    • http://nizowozutagele.atwebpages.com/glencoe_mcgraw_hill_algebra_2_textbook.pdf
    • http://xaposekesudonod.epizy.com/cours_sur_les_barycentres_terminale_s.pdf
    • http://garulolit.rf.gd/36352859982.pdf
    • http://bukuzem.rf.gd/assignment_of_land_contract_form_michigan.pdf
    • https://s3.amazonaws.com/sumesawoxajew/what_type_of_organizational_structure_is_nike.pdf
    • https://ff06b2c9-6223-4357-b4d5-1bf3807c749f.filesusr.com/ugd/717131_5d75ba5a92c54f47809f5082a6f4da99.pdf?index=true
    • https://s3.amazonaws.com/tadevewuju/29427184712.pdf
    • http://jovesiresumu.rf.gd/xukamisanino.pdf
    • https://d427386d-3434-45d9-8802-370857a594f4.filesusr.com/ugd/accd1f_c40b09c9d99242d6ab6a9bac0f8ff95e.pdf?index=true
    • https://96a9e3af-f0c3-4048-9e6c-0ad8da3c6018.filesusr.com/ugd/15d534_c74b50632a7c41629b77ca9f65a6a278.pdf?index=true
    • 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_off0000e752.bin
cba9acc78bdc813829f3ae7726169e20ec8e9903b6842da2dfddf9f0402b7d0a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE752 5348 bytes
font_01_sfnt_off0000f95d.bin
2be57711df048d2b9635c2fae47660cd00e37cd6b9d641c1d2e355e89827c7ad		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF95D 10220 bytes

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