Malicious PDF — malware analysis report

Static analysis result for SHA-256 65f7b11cfec2ba5a…

MALICIOUS

PDF

73.9 KB Created: 2021-06-08 03:00:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 954b646a5a1915ed7b16cbbc088bed13 SHA-1: 51f4dfa2d691af500c0867065fed57f0e128e5d1 SHA-256: 65f7b11cfec2ba5a66db4474b566090952281878728510b7cd55a37fdb5bf487
164 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains a large number of external links, many of which are to PDF files, suggesting a link farm or phishing attempt. The heuristic 'SE_URGENCY_LURE' indicates the document uses language to create a sense of urgency. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution via the embedded URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 6

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://seumenha.ru/123?utm_term=can+you+report+someone+to+cps+anonymously PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4490141/normal_604f9c3955e88.pdfIn PDF document text
    • https://bizugejukuvav.weebly.com/uploads/1/3/4/3/134322279/zorij.pdfIn PDF document text
    • https://kuxodebareku.weebly.com/uploads/1/3/4/0/134042390/pimuxiniv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475985/normal_6016deaa8dea6.pdfIn PDF document text
    • https://ganupedudajoz.weebly.com/uploads/1/3/4/5/134586443/nigesexetoxuvo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485176/normal_5fe708e6d3d76.pdfIn PDF document text
    • https://xirabefutabo.weebly.com/uploads/1/3/5/3/135323672/siturewelob.pdfIn PDF document text
    • https://sevezumu.weebly.com/uploads/1/3/2/7/132710575/5601996.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/775c9aa9-a749-46c4-b96c-13ff677b669d/sudiwujiwadoboze.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2944cfe9-ae6e-4c1e-b070-c799953913bc/99415857392.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2c4953e1-58f0-468b-b471-aa137cddda79/groundwork_for_the_metaphysics_of_morals_preface_summary.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d1c4a0f-e8db-4184-8c73-99c67cbac091/android_5_google_account_manager.apk_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b76f7026-bef4-4ef7-9fd1-166fadd7f132/conflict_management_styles_army.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/be39a666-c02e-47c5-a207-d3391e758d68/kgf_2_tamil_full_movie.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f709152c-e220-4dc1-aad4-456d7eeaf117/how_to_write_a_eulogy_example.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/67fa348c-8400-473f-b2bc-e8612da5cc77/pokemon_ash_betrayed_champion_fanfiction_harem.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4edd7e51-1c4f-4302-b0c4-5d1e58129ae5/seth_rogen_net_worth_2020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/61da5249-6889-48dd-adec-02a08d5c40af/16817160372.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_off0000e5f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5F1 5084 bytes
SHA-256: 7a65b65c1943db0409d6afaec386d0960b582e6244868e0f8dc43591d640d644
font_01_sfnt_off0000f72e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF72E 10380 bytes
SHA-256: 0a12b319424c300e46ef3ecc7b9dc3dfed816c4667070ae728f2d3ef4ce97d18

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