Malicious PDF — malware analysis report

Static analysis result for SHA-256 2aeb8c22d3fc894e…

MALICIOUS

PDF

79.1 KB Created: 2021-03-28 22:55:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7617fc696e73e51318010787af41cd14 SHA-1: 7e76ea61f3f7a641e2f74e7deb07ec82ec07d246 SHA-256: 2aeb8c22d3fc894e489e9b2d27ee632616b0ff86838d20f24a374fe297079f1b
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one prominent URL pointing to a suspicious domain that appears to be part of a link farm. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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.
  • 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://crophysi.ru/wix?keyword=heredity+simulation+worksheet+answers
    • https://buzixigadojaw.weebly.com/uploads/1/3/5/3/135316262/nizuguluno-dekizadogituz.pdf
    • https://kaginugopaz.weebly.com/uploads/1/3/4/3/134310825/4179123.pdf
    • https://safipeta.weebly.com/uploads/1/3/1/4/131408280/gowuzus.pdf
    • https://dunofedipusafo.weebly.com/uploads/1/3/4/4/134477286/f25af.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/jokotaziweluge/rrb_group_d_2018_exam_date_sheet.pdf
    • https://uploads.strikinglycdn.com/files/9a2d676e-bf64-4787-b281-e10f5fc00d85/john_deere_650_750_tractor_service_repair_manual.pdf
    • https://ba10d46a-d7c1-43af-8542-f1a50f31aa8a.filesusr.com/ugd/4dded2_25c8dfbf202d4b19990bc8cc24cd85e2.pdf?index=true
    • https://s3.amazonaws.com/kewuxejikiwe/ap_bio_cladogram_worksheet_answers.pdf
    • https://uploads.strikinglycdn.com/files/d4457984-0f41-4175-8f3f-27c4c6ba3c21/city_of_bones_cassandra_clare_characters.pdf
    • https://uploads.strikinglycdn.com/files/f2f037cf-131b-4f8b-bc9a-54392a16ee38/76211426038.pdf
    • https://s3.amazonaws.com/bejokazemur/vavobaponudakokorerinem.pdf
    • https://uploads.strikinglycdn.com/files/ea37e12c-7ddd-4c6c-85a6-3b5efbbee0af/manual_de_iglesia_adventista_2015_descargar.pdf
    • https://67dec473-0a9c-497c-80b1-62a4c84c5046.filesusr.com/ugd/0aab01_147d832e1ecc4d1cb72601fe262059b6.pdf?index=true
    • https://uploads.strikinglycdn.com/files/9ec583f4-2190-41f1-8bbc-caf2ae65febd/how_do_i_connect_my_kenwood_bluetooth_to_my_iphone.pdf
    • https://uploads.strikinglycdn.com/files/20833933-0691-4373-a0c9-80331f83e60b/their_eyes_were_watching_god_summary_chapter_10.pdf
    • https://uploads.strikinglycdn.com/files/11148f6d-6c1f-49cb-a81f-ac46f3c2c79f/99181770268.pdf
    • https://uploads.strikinglycdn.com/files/11b28b36-57f9-40ff-ad9a-4b2b50df86d4/suferamugerazumi.pdf
    • https://61249681-e2d1-4375-841a-b3723294d79c.filesusr.com/ugd/3d514e_0f606361608f4e11b940b3d97693968b.pdf?index=true
    • https://uploads.strikinglycdn.com/files/b9b8767c-240f-4fc8-9c06-8b3f402ec826/2718705368.pdf
    • https://uploads.strikinglycdn.com/files/954cebd2-dd8c-4071-9d23-2a832edc039e/solutions_manual_to_accompany_linear_programming_and_network_flows.pdf
    • https://c0a42e0f-4cce-4e1b-84a6-2a5440198d67.filesusr.com/ugd/440b6d_4a87b58f08b044e1b32df1c4d0243035.pdf?index=true
    • 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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e323.bin
80be49057032dd0ef216cd234a0a96a23fd45b71fbc49f7a60df50bde315e944		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE323 5284 bytes
font_01_sfnt_off0000f4fe.bin
28c1a6ea7be031661a9283522e16f67bbd581dae89f62adfb33f8e766b4aa1e7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF4FE 10772 bytes
font_02_sfnt_off000119d7.bin
60f53b17f7925ac1818ac9336ea58fd206fea48872b5377b70e6fb8114080afd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x119D7 16132 bytes

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