Malicious PDF — malware analysis report

Static analysis result for SHA-256 25bc7ff1ba3b4790…

MALICIOUS

PDF

96.6 KB Created: 2021-04-09 17:11:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 7eef56d77fb8c379b8105a109b190251 SHA-1: 26753b9c877842b2050f78f869b7ba5117332b33 SHA-256: 25bc7ff1ba3b4790e682eaa56d0c58c9b21863462aba282d0e70de5aeec826f1
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many pointing to disposable hosting, suggesting it is part of a link farm designed to drive traffic or host phishing content. The embedded URLs and the PDF structure itself are indicative of a phishing or scam campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 6

  • 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 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.
  • 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://dugedepap.ru/strik?utm_term=metamorphic+meaning+in+urdu PDF link annotation
    • https://tofikopu.weebly.com/uploads/1/3/1/3/131381225/vuwovogas_zotekada_vegodul_nesikamixom.pdfIn PDF document text
    • https://gopilabuvimira.weebly.com/uploads/1/3/1/4/131453416/nakop.pdfIn PDF document text
    • http://blancer.xyz/hp_photosmart_5520_ink_replacementr37xv.pdfIn PDF document text
    • http://maliwalilaz.22web.org/how_much_money_do_reiki_masters_make.pdfIn PDF document text
    • https://norusukesalija.weebly.com/uploads/1/3/4/3/134356509/6366055.pdfIn PDF document text
    • https://gunanase.weebly.com/uploads/1/3/4/4/134488627/kiduziduv-vonoke-warufagada.pdfIn PDF document text
    • https://rezomiwutamanap.weebly.com/uploads/1/3/4/3/134362688/larekitoduxanetu.pdfIn PDF document text
    • https://vovasodakujex.weebly.com/uploads/1/3/0/8/130874601/9183920.pdfIn PDF document text
    • http://kawlites.online/16391399243n1arm.pdfIn PDF document text
    • https://mifepomaxa.weebly.com/uploads/1/3/4/8/134897651/gowirodiviso.pdfIn PDF document text
    • https://podogavefa.weebly.com/uploads/1/3/1/4/131438056/41bb6694535.pdfIn PDF document text
    • https://dapavivilo.weebly.com/uploads/1/3/4/8/134895477/918188.pdfIn PDF document text
    • https://fufiwixafuwisu.weebly.com/uploads/1/3/4/7/134770326/3896040.pdfIn PDF document text
    • http://opit.space/68496846377e7jqy.pdfIn PDF document text
    • http://fb-copyright-help-from.com/kenneth_hagin_ministries_bookstoredulex.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://510b81f6-be4e-4e40-9acf-3f60af495837.filesusr.com/ugd/5f226b_67b1f20b3ccf48d694d192ba79d6cc32.pdf?index=trueIn PDF document text
    • http://zimunumiwu.epizy.com/isotopes_worksheet_and_answers.pdfIn PDF document text
    • https://42f4b946-f871-4f2a-a73e-6571c6569919.filesusr.com/ugd/e20521_40fd3fd449e74178bbd56ada26128323.pdf?index=trueIn PDF document text
    • https://02664c88-84e5-42fa-aae3-682d3a0d4328.filesusr.com/ugd/39d081_2faf7b93c64d45b2896b482babee7857.pdf?index=trueIn PDF document text
    • https://9387bd13-3746-4408-b474-2867f26e464d.filesusr.com/ugd/ace02d_8e67a7ee5de245c985e7ed432bd8da78.pdf?index=trueIn PDF document text
    • https://0e75ab8e-f6a1-4360-bef2-1d94e06fde4e.filesusr.com/ugd/c0518c_fc8f719188014b79922262df9df2063e.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00013efb.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x13EFB 21120 bytes
SHA-256: 995e19df19e1f8abbfc20fbce5d83eb40623b03b19aa52408ae17ef7618ecd9e
font_00_sfnt_off00010712.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10712 5284 bytes
SHA-256: 18704e44740898bac6c7cc6c008a1ab722d88b0e8a2f6e4e54b4d6acaf47db37
font_01_sfnt_off000118eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118EB 11340 bytes
SHA-256: c2d6b9d713714a7699da7a159d7482cda0acd28530b39b3b2e39fadf338cf07a
font_03_sfnt_off00016359.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16359 4588 bytes
SHA-256: 70184042fab09c0ada6b67b65f5ae5726ef4333d622165910c5eae45a5487a1d

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