Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce3ad855f0c38ba6…

MALICIOUS

PDF

80.0 KB Created: 2021-05-21 00:17:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 3eaf5d2e57d2779b9df1cb60beb4a6b1 SHA-1: 9152d484e926aed71fff8c87614761e773e18d45 SHA-256: ce3ad855f0c38ba60ec84d03f1216721bf4e2fcddf2af60bea920851d22041a2
156 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a link farm and an embedded URL pointing to 'soxebez.ru', which is flagged as malicious. The ML classifier and ClamAV also strongly indicate maliciousness. While no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to redirect the user to a malicious site, likely for phishing or to download a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://soxebez.ru/strik?utm_term=the+secret+life+of+bees+ebook+download+free PDF link annotation
    • https://gupapuna.weebly.com/uploads/1/3/4/7/134726568/kuzopetugoki.pdfIn PDF document text
    • https://rikomurisixub.weebly.com/uploads/1/3/1/4/131454733/2a5fab5.pdfIn PDF document text
    • https://kifikutomile.weebly.com/uploads/1/3/0/7/130776046/9c2d93afe25a756.pdfIn PDF document text
    • https://pememeva.weebly.com/uploads/1/3/0/8/130874233/c91249cb144.pdfIn PDF document text
    • https://tewavifoma.weebly.com/uploads/1/3/4/4/134482239/rafifivolibusarezub.pdfIn PDF document text
    • https://petodudugagakot.weebly.com/uploads/1/3/4/6/134640630/volexalapenebiset.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/7097d490-cd2d-496a-bf4a-4ba3d26e60a5/51109929198.pdfIn PDF document text
    • https://s3.amazonaws.com/kakekojezutok/68882800779.pdfIn PDF document text
    • https://s3.amazonaws.com/gelawiweza/normas_de_auditoria_interna.pdfIn PDF document text
    • https://s3.amazonaws.com/sinadi/madame_butterfly_story_tagalog.pdfIn PDF document text
    • https://s3.amazonaws.com/zuwosil/cambium_ptp_550.pdfIn PDF document text
    • https://s3.amazonaws.com/sugowubuf/76466139006.pdfIn PDF document text
    • https://s3.amazonaws.com/winumigutam/11th_old_political_science_book_in_tamil.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0d16825f-6486-48ca-b0d5-16b2e4685e0e/what_is_the_lowest_age_of_consent_in_america.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0efabcc9-5f01-4824-a80c-82aef1c9c9e5/how_to_play_boss_monster_the_next_level.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4f19fabe-03b3-4861-b2e4-fe789dd23ef9/21837162128.pdfIn PDF document text
    • https://s3.amazonaws.com/pukiza/naxaxavizuxigogeje.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f3423f3d-be67-4e7f-80d1-2aec990fa494/how_to_create_an_android_app_for_beginners.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_off0000f9ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9AC 5352 bytes
SHA-256: 4eed6fb00a12435c5994bee1bc87e69a67ca35b115132a74793f382044b706cf
font_01_sfnt_off00010beb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BEB 10896 bytes
SHA-256: bfc0fb3480ce60315ff34b31ee92bee7a886c803406dc29c26e12d140ecccafc

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