Malicious PDF — malware analysis report

Static analysis result for SHA-256 d32fc62499028a48…

MALICIOUS

PDF

92.6 KB Created: 2021-03-30 13:03:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e37be66266cd4dd5af01cf583fbdd395 SHA-1: 7c33153d9326f3f13f4b49b04e12ad99adc18ad7 SHA-256: d32fc62499028a48cf3d12ee8463a3796473f41a9c39304de1a95994edb5ff23
156 Risk Score

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 point to potentially malicious domains, indicating a link farm or phishing attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. Although no scripts were directly extracted, the PDF structure and numerous external links are indicative of an attempt to redirect users to malicious content.

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://resalured.ru/strik?utm_term=norse+mythology+ash+tree+crossword+clue
    • http://new-volosi.ru/girixajixidokoxokodomerixeo41.pdf
    • https://xufalawat.weebly.com/uploads/1/3/0/8/130814535/penusipotol.pdf
    • http://sfhgfje5df.xyz/984964552787x6en.pdf
    • https://burevojaziji.weebly.com/uploads/1/3/4/7/134729690/fivepotututajo.pdf
    • http://youralteragoods.com/19114039402onbl2.pdf
    • http://bizbize-yeteriz.org/bavetegalejo1ti5.pdf
    • http://gtomishebs.xyz/get_covered_illinois.govuo0ui.pdf
    • http://kyukty68.xyz/movistar_peru_tv_aztecahivhe.pdf
    • http://changepass.online/ukulele_strumming_patterns_4_4d4fg6.pdf
    • https://lubafotet.weebly.com/uploads/1/3/1/3/131380208/9238299.pdf
    • http://andyhong.blog/62156966329wu2tf.pdf
    • http://goodnatural.space/al_manhal_dictionaryiru7f.pdf
    • http://nosinoski.shop/sofewumezagadelipijugs08g.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://a44a9d9e-3ce9-422e-9b5d-83ef2d4925cb.filesusr.com/ugd/3234e9_084cd43d97dc47888804107edc3fdd7a.pdf?index=true
    • https://uploads.strikinglycdn.com/files/57705db7-b5da-4133-9528-c4e71df106bb/70213797659.pdf
    • https://uploads.strikinglycdn.com/files/b72d8b21-7328-44f5-b57d-c246e88a4252/95148853681.pdf
    • https://uploads.strikinglycdn.com/files/a4210a33-6cd9-49f2-8f1f-885371681416/linear_algebra_4th_edition_solutions_david_c_lay.pdf
    • https://315736c7-1030-4200-8d24-05c9f4951019.filesusr.com/ugd/d19ca0_de902f2410ac4c6d88956ae0309bb2e2.pdf?index=true
    • https://0ddd2631-58c7-464c-86d0-a5d1d8121c04.filesusr.com/ugd/301b85_2f9d400944f946c595c593f0d981acbe.pdf?index=true
    • https://uploads.strikinglycdn.com/files/92782f52-bddd-4d75-a2f5-a5c3b3d7bbd0/90748622041.pdf
    • https://uploads.strikinglycdn.com/files/a57d5282-ed5c-4420-8d79-46ce6487c53c/jojadezuvuvenenidob.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010898.bin
edc215bc989425195c2bb6bec6b5ccf10465d967ebcbb2bf80cb54b0af6d9e82		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10898 9492 bytes
font_01_sfnt_off0001285c.bin
7185027a936337adfff2f909ac1db2587e4454ade5ae532d9140ead4dbfc375a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1285C 5516 bytes
font_02_sfnt_off00013b06.bin
d626954621daec704c4d2dedd561337a52ae92abf46a25fe516a7cd1f05e2ed2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13B06 12460 bytes

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