Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3ba9e415c890cba…

MALICIOUS

PDF

72.4 KB Created: 2021-06-07 23:03:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: afaac9fe5e36f13a2d266d5261d15673 SHA-1: 05ba7954e7be1363443329dff35975988e571780 SHA-256: f3ba9e415c890cbac2a396f5f55f6b77efb7a05e5923d89b8f000bc7c71c02c8
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that directs users to a domain associated with phishing or malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to trick users into visiting the URL for a deceptive purpose. No scripts were extracted, but the presence of the malicious URL is the primary indicator of compromise.

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://inwebjor.ru/pbw?utm_term=apps+to+improve+sound+quality+on+android
    • https://static.s123-cdn-static-d.com/uploads/4460043/normal_60b456bfb0870.pdf
    • https://static.s123-cdn-static-d.com/uploads/4496571/normal_60b645b517b8f.pdf
    • https://cdn-cms.f-static.net/uploads/4370303/normal_6038e55bcca78.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://sipibujewadu.pbworks.com/f/95197636344.pdf
    • http://padimagofo.pbworks.com/f/23995289442.pdf
    • http://zexowisam.pbworks.com/f/1900533932.pdf
    • http://vifogajo.pbworks.com/f/ict_scheme_of_work_for_primary_school.pdf
    • https://uploads.strikinglycdn.com/files/33da8fd6-26a9-4d6b-83f3-988a84df81c0/ham_radio_deluxe_manual_log_book.pdf
    • http://dejimebez.pbworks.com/f/cuantas_calorias_tiene_una_cucharada_sopera_de_miel.pdf
    • http://gupiguna.pbworks.com/w/file/fetch/144550809/mashed_potatoes_recipe_with_heavy_cream_and_milk.pdf
    • http://jajisaparev.pbworks.com/w/file/fetch/144419166/accounting_ratios_class_12_questions_and_answers.pdf
    • https://uploads.strikinglycdn.com/files/c5ad19a6-b980-48fb-a693-fbeecbed23d4/the_secret_life_of_pets_3_10.pdf
    • http://jabevexizoj.pbworks.com/w/file/fetch/144722112/biwajozifinigobiminojet.pdf
    • https://uploads.strikinglycdn.com/files/a218f464-9733-4c59-a2d1-ef0e7efd25c0/typography_design_definition.pdf
    • http://wojipag.pbworks.com/w/file/fetch/144659820/is_canidae_grain_free.pdf
    • https://uploads.strikinglycdn.com/files/169945f5-9d83-4550-b87e-556e20510d12/doctrina_monroe_y_destino_manifiesto.pdf
    • http://wenitudodub.pbworks.com/f/how_to_get_no_eyes_in_royale_high.pdf
    • http://jajisaparev.pbworks.com/f/69423186595.pdf
    • https://uploads.strikinglycdn.com/files/a00e5ff1-9d2e-49aa-b10a-2aa9d5bf4c1d/lototo.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_off0000de7b.bin
66dafbad1302282fd54d9d0c4c3d62cd5b1b3d7511e7888b6d493a4ff1e518d9
pdf-font-stream PDF embedded font (sfnt) at offset 0xDE7B 5384 bytes
font_01_sfnt_off0000f0b9.bin
d43c47ecc5ebcf202f716550f9aa0df9aa75254fdbbccd3d8a6b7844468d4e94
pdf-font-stream PDF embedded font (sfnt) at offset 0xF0B9 10476 bytes