Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f30490e2cdfcbef…

MALICIOUS

PDF

83.5 KB Created: 2021-03-18 18:46:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: bcd3bd5684fcfbf7d95f3a8ae01657b5 SHA-1: eb6eb750aab88f8d109dccfafdad1bdeae24440c SHA-256: 6f30490e2cdfcbeffe9b3dd0ee4a1e4599cc890d9456266fae05bfc339e6fd18
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://leonvi.ru/123?utm_term=lessee+information+sheet+bir+deadline PDF link annotation
    • http://feelslike35.com/muzeretinitowojepe7t0py.pdfIn PDF document text
    • http://com-signto2.xyz/filme_antes_de_partir_dublado_gratis416x6.pdfIn PDF document text
    • http://stassikorskyi.com/xelujifajovupb3boq.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/lomuper/wh_digraph_worksheets.pdfIn PDF document text
    • https://ac402fee-74f4-49a6-b5a4-6a03c6a057de.filesusr.com/ugd/b0cd75_8680712bd28a42f1ac4d3ccd63234e0b.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/99fabcc9-d21c-4b8a-aa84-043af1900711/ipad_mini_case_with_screen_protector.pdfIn PDF document text
    • https://54957a25-093b-4cbd-a4f0-8eb5fea931f0.filesusr.com/ugd/8ba634_af119947da844c0a918e465c7f41d9aa.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/7a6a4e81-cd38-4bac-b287-550471fa0878/how_many_calories_in_a_large_dunkin_donuts_iced_coffee_with_cream_and_sugar.pdfIn PDF document text
    • https://98350ace-7ac4-4f38-a9d9-579fdad8050b.filesusr.com/ugd/9b2d9b_c1142e7735fe4ed2b70f406fe5c244b2.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/dc91c17c-d637-486a-b94b-44ad26f0f1b9/mobadudatigurexidotebafe.pdfIn PDF document text
    • https://33c7e2ec-32fc-4676-a642-9d95a4379e01.filesusr.com/ugd/622218_674f5c493b2144f9b56a27b46c92cb1f.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/f09ebd10-eb16-4ad5-a563-be1519e33e1e/ebay_fedex_tracking_number_not_found.pdfIn PDF document text
    • https://45e41439-46a4-4c97-84f0-155cfeda4cef.filesusr.com/ugd/9d7ad9_670b2bb675dc42e791f719f8c4fe549e.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/3d49f11d-52e1-48a8-8758-9ff8b00a568b/american_gods_season_3_episode_1_synopsis.pdfIn PDF document text
    • https://c69a8150-bb1e-4c46-878b-fc1622391bd7.filesusr.com/ugd/cf91d6_4cc940a0ecef4dd0b0723c31ae44c624.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jakujakula/60399155081.pdfIn PDF document text
    • https://170d08c7-2527-4f8e-8bc4-cf7f6ffab704.filesusr.com/ugd/afe24e_904b67793c474cfc95c4034bf9111289.pdf?index=trueIn PDF document text
    • https://45f91bdd-2b68-4e60-ae2c-b14373ae5332.filesusr.com/ugd/0d089b_50982d8dafea42348a710fbd34da0185.pdf?index=trueIn 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fcec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCEC 5016 bytes
SHA-256: e634fd0e9b32c8b8a2067ef129320d476ab78e507c5f0b7a1d690c88f1de82ed
font_01_sfnt_off00010dbe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DBE 10672 bytes
SHA-256: 9cc99b95617741ed70d73303b2483ac99c1b30019718224008a89bae73b079d1
font_02_sfnt_off00013222.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13222 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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