Malicious PDF — malware analysis report

Static analysis result for SHA-256 0227d2b916b4af2e…

MALICIOUS

PDF

121.7 KB Created: 2021-03-16 18:09:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 1cc00a6e8ea68f84bae01b706995c992 SHA-1: 5499ddf7a72e39d3dc9f6ea312599acb7b01dd96 SHA-256: 0227d2b916b4af2e0af365fe9031b28b9bbaeca383cbfd38d5e651647604bcb5
96 Risk Score

Malware Insights

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

The file was flagged by ML classifiers and ClamAV as malicious, with a high risk score. It contains an embedded URL pointing to 'zajinet.ru', which is likely part of a phishing attempt. Although no scripts were explicitly extracted, the PDF structure and embedded URI heuristic suggest an attempt to lure the user to a malicious site, consistent with spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://zajinet.ru/wix?keyword=xt808+tactical+flashlight+battery PDF link annotation
    • https://cdn.sqhk.co/gujuvizaja/WjijhfC/itopya_asus_monitor.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378157/normal_6021434d18a48.pdfIn PDF document text
    • https://cdn.sqhk.co/gulanuwe/Dijhdgj/50494912065.pdfIn PDF document text
    • http://womans30planet.com/1940762450yz6mw.pdfIn PDF document text
    • https://cdn.sqhk.co/tazifawixax/aUgcF6F/free_download_metronome_beats_for_pc.pdfIn PDF document text
    • http://gratoraama.website/wujarumevofevrngh.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379851/normal_6029914f0ae43.pdfIn PDF document text
    • https://cdn.sqhk.co/tezimafi/3lkjehj/android_emulator_for_windows_7_highly_compressed.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/81ca14a6-a295-4fba-8250-2c7ba92be0f5/bejelimegaxa.pdfIn PDF document text
    • https://s3.amazonaws.com/patilawasu/36800679765.pdfIn PDF document text
    • https://s3.amazonaws.com/gafedupeba/pusevitojuguwerovon.pdfIn PDF document text
    • https://s3.amazonaws.com/guxosa/sufenigabogofexasak.pdfIn PDF document text
    • https://s3.amazonaws.com/nonabafat/46766345649.pdfIn PDF document text
    • https://s3.amazonaws.com/wibadinavosunom/61728343270.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ae3d5bec-e967-4ad8-9cd9-bc4375e1fb02/38702191092.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e2b8ab10-4388-4fcc-8cbe-f9ab46b03343/90175146029.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6a457073-c8e9-477c-a1e3-f9ae8fbaad36/best_criminal_law_texts.pdfIn PDF document text
    • https://s3.amazonaws.com/wifiduxezo/emergency_contact_list_template_for_employees.pdfIn PDF document text
    • https://s3.amazonaws.com/nezanurugega/panokixosowekozelaga.pdfIn PDF document text
    • https://s3.amazonaws.com/jajoxulabojaso/pesunin.pdfIn PDF document text
    • https://s3.amazonaws.com/sefipa/how_to_interpret_laws_and_regulations.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00019d08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19D08 5700 bytes
SHA-256: 4d8686cb67ce0aeae49459de231307e3530c76b36c7057b295125c1f396db9ac
font_01_sfnt_off0001b070.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B070 12176 bytes
SHA-256: b24b994203895773ec7ecbf656c1ac40c701a6953137061a5e929238599b2562

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