Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae251258fbf95778…

MALICIOUS

PDF

89.0 KB Created: 2021-05-29 21:24:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0a83d58e58cf7d111c68142ea8097e7b SHA-1: 2bb583dbf5e34cfce1343813255cfd3d886cfa66 SHA-256: ae251258fbf95778c83d50be4dfc64036ebc7c987e4c7283dc8e2bc5fc091d69
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to potentially malicious domains, as indicated by the PDF_SEO_LINK_FARM heuristic. The ML classifier and ClamAV detection strongly suggest malicious intent. The embedded URL and the document body, though heavily obfuscated, suggest a lure related to movie downloads, which is a common tactic for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://botokaw.ru/strik?utm_term=spider+man+homecoming+in+hindi+filmyhit
    • https://wisixujedos.weebly.com/uploads/1/3/4/7/134732494/weditudiduxetaru.pdf
    • https://sivamodinuna.weebly.com/uploads/1/3/4/7/134762665/pobevoruwebejif-kuropori-kozoji-gokonekowu.pdf
    • https://kevugekakizuxo.weebly.com/uploads/1/3/4/4/134481001/vepexo.pdf
    • https://rikedinodewo.weebly.com/uploads/1/3/5/3/135323941/7567087.pdf
    • https://sanupeden.weebly.com/uploads/1/3/5/9/135961416/1216444.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.fontrix.comhttp://www.nhncorp.com
    • http://www.daltonmaag.com/
    • http://fedorahosted.org/lohit
    • https://uploads.strikinglycdn.com/files/c74c64ef-f491-47fa-83da-5a3f04bbdd65/murachs_java_programming_5th_edition_solutions.pdf
    • https://uploads.strikinglycdn.com/files/486c3837-cf71-42e3-b35b-18301ad3a64e/pasewojitinipakikuvewid.pdf
    • https://uploads.strikinglycdn.com/files/22ab12ab-4958-4076-a95d-eb7a5418072d/71667376016.pdf
    • https://uploads.strikinglycdn.com/files/ebf11256-9f52-4b65-a100-94248e81d6e5/divine_mercy_funeral_home_fort_wayne_in_46805.pdf
    • https://uploads.strikinglycdn.com/files/c073b774-db99-424d-abde-a8129bfd8ede/lozivitaxiterubi.pdf
    • https://uploads.strikinglycdn.com/files/47d86a63-aaed-40a3-a9a9-f9c057a370ed/pewojotoz.pdf
    • https://uploads.strikinglycdn.com/files/27e57eeb-808c-4968-b28d-66dda5b40c94/laxilaxidikupipi.pdf
    • https://uploads.strikinglycdn.com/files/ecd017c9-96be-4e2c-8326-6e8d5435baa7/class_8_math_book_download_2020.pdf
    • https://uploads.strikinglycdn.com/files/785038ae-2901-4821-8d7f-f8a174b0e5ad/maytag_centennial_gas_dryer_repair.pdf
    • https://uploads.strikinglycdn.com/files/9299f129-2d41-4873-aeaf-43c89c6a676f/juxegi.pdf
    • https://uploads.strikinglycdn.com/files/109e49c2-96a9-4e6e-b870-29dee0706e24/how_many_grams_of_sugar_in_a_sonic_milkshake.pdf
    • https://uploads.strikinglycdn.com/files/6278ef98-ab61-40c4-b8af-9758a809a8c7/tascam_dp-03_manual_en_espaol.pdf
    • https://uploads.strikinglycdn.com/files/b9980a34-cbf3-4f24-9000-c0d131eb83e0/the_legend_of_zelda_majoras_mask_3d_walkthrough_no_commentary.pdf
    • 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://www.geocities.com/mitra_anirban/hobbies.htmGNU
    • http://www.gnu.org/copyleft/gpl.htmRegular

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e5e0.bin
8ca44d257e24e5f0c082bf017dde9e13ba1ab87379ac60d50d27cf2fadb9c984		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE5E0 5384 bytes
font_01_sfnt_off0000f7f8.bin
b91f3c26f37c28538ed09035cbea6f9221827f1e30b50c452f08cc820bcc167b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF7F8 3720 bytes
font_02_sfnt_off0001035b.bin
2491969b6cff6971f244d8969f2321449b8ccf73bc500fd2998b7d99a10cce02		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1035B 11412 bytes
font_03_sfnt_off00012a07.bin
e5f30af547b55dfbbae63869c45e93d04e829a64999393572a2275da8290585e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12A07 2056 bytes
font_04_sfnt_off000132be.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x132BE 4324 bytes
font_05_sfnt_off000140bf.bin
e471f57a01ceb126ea08a6ec10bdec68b29aca9a6c7f3e818fb6b503ac69cb44		 pdf-font-stream PDF embedded font (sfnt) at offset 0x140BF 5800 bytes

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