Malicious PDF — malware analysis report

Static analysis result for SHA-256 303dd6aa20b43780…

MALICIOUS

PDF

79.0 KB Created: 2021-03-23 22:36:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1305c059405f1f326fa992cc72e9ca59 SHA-1: 17defaef91d5e88a4f826f836b89d70669d8c9a5 SHA-256: 303dd6aa20b4378047454c0ca57a31fd73e91ba2d7d370d21836a15927ad450c
96 Risk Score

Malware Insights

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

The PDF contains an embedded URL that directs users to a suspicious domain, likely for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URI heuristic suggest it's designed to exploit users by directing them to malicious content.

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/123?utm_term=celeste+and+jesse+forever+script+pdf
    • http://kowuterada.mygamesonline.org/booklet_printing_upside_down.pdf
    • http://sazulido.medianewsonline.com/rotasuwefawubakom.pdf
    • http://xibawolafubiz.getenjoyment.net/nugosezaxi.pdf
    • http://supernefritroller.xyz/sokofozagadoxaejwmy.pdf
    • https://cdn-cms.f-static.net/uploads/4490534/normal_6055038e584e9.pdf
    • https://cdn-cms.f-static.net/uploads/4479710/normal_6036cdb067dfc.pdf
    • https://cdn-cms.f-static.net/uploads/4448744/normal_603bc91d0f696.pdf
    • http://arfeshome.com/novos_poemas_carlos_drummond_de_andrade78mu9.pdf
    • http://phillipen.online/dietary_guidelines_for_trans_fatq15mv.pdf
    • https://cdn-cms.f-static.net/uploads/4402517/normal_600fab79b7dfa.pdf
    • http://kanshoper.site/john_deere_lawn_mower_dealership_near_mem1i1v.pdf
    • https://cdn-cms.f-static.net/uploads/4417025/normal_60468adf9aad9.pdf
    • http://bet-info.ru/the_bogleheads_guide_to_retirement_planning1515o.pdf
    • http://memaberenux.scienceontheweb.net/obligate_intracellular_parasite.pdf
    • https://static.s123-cdn-static.com/uploads/4460447/normal_5fe00623dd23a.pdf
    • https://cdn-cms.f-static.net/uploads/4479462/normal_602af4825580e.pdf
    • https://cdn-cms.f-static.net/uploads/4453734/normal_602a9f70134dc.pdf
    • http://xokijaxano.medianewsonline.com/fabrication_calculation_formula.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/c96f609b-65d8-4fe8-87d5-094dd5714441/396251491.pdf
    • https://uploads.strikinglycdn.com/files/832c3729-04ab-4f97-8437-d79cbb50bff5/83293417118.pdf
    • http://bokawevetejap.atwebpages.com/similes_metaphors_and_personification_worksheet.pdf
    • https://uploads.strikinglycdn.com/files/05417384-7820-46a8-a173-00f99fd43cf5/how_to_get_a_digital_copy_of_marriage_certificate.pdf
    • https://uploads.strikinglycdn.com/files/72f839b4-620f-45fc-915b-bf6d695ee97f/kapoxifu.pdf
    • http://tarepos.onlinewebshop.net/kugafiworunagimizuw.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_off0000f6f6.bin
3ca1f936b6284a3e777d7c494354a6438191b557283c7290bd74d911fcfb1f28		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF6F6 5188 bytes
font_01_sfnt_off000108ba.bin
d81c019bcd23dabfb66438a39ee096d9bec7f0d88cff9906bd9d28034fe15a38		 pdf-font-stream PDF embedded font (sfnt) at offset 0x108BA 10932 bytes

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