Malicious PDF — malware analysis report

Static analysis result for SHA-256 10db250aa661864a…

MALICIOUS

PDF

83.3 KB Created: 2021-04-22 18:03:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0489ee66e305f5e45626894682007c34 SHA-1: 90173883594c042501e8c93c356a092feeb7865c SHA-256: 10db250aa661864a8ef57c8a2269f00bf5be74cda34c7c1ae0d8c5753aa66520
156 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 phishing or trojan payload. It contains a large number of external links, suggesting a link farm or redirection mechanism to host malicious content. The document body, though heavily obfuscated, appears to be a lure related to 'dark souls 2 mods'. No scripts were extracted, but the PDF structure and numerous external URLs are indicative of a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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=best+dark+souls+2+mods
    • https://cdn.sqhk.co/ligumorik/GTAiagc/rigabep.pdf
    • http://zupurowuzuxule.iblogger.org/cursed_treasure_2_mod_apk.pdf
    • https://wotigutaz.weebly.com/uploads/1/3/4/3/134361511/fitimabifut.pdf
    • https://kogofidovobe.weebly.com/uploads/1/3/1/8/131871531/gijaverini-midogezuloz-jamipapu.pdf
    • http://sinoniwim.22web.org/covering_letter_format_word_document.pdf
    • https://zuretajobujab.weebly.com/uploads/1/3/1/4/131483148/rajanenon.pdf
    • https://rikolalevagamer.weebly.com/uploads/1/3/1/1/131164452/9820258.pdf
    • https://cdn.sqhk.co/mezutowede/egjrahd/42434419334.pdf
    • http://fasebumexu.iblogger.org/madinah_arabic_reader_book_4.pdf
    • https://vofirojaj.weebly.com/uploads/1/3/1/6/131637635/6265082.pdf
    • http://pimegaxonubaz.22web.org/pole_barn_plans_free.pdf
    • https://fuvukajewub.weebly.com/uploads/1/3/3/9/133999399/benozekofari.pdf
    • https://cdn.sqhk.co/xinosemu/igs2gfz/62747213832.pdf
    • https://cdn.sqhk.co/savunowudob/hbRvCia/xodefelajawuwefuwokuveko.pdf
    • https://dujapiloxi.weebly.com/uploads/1/3/1/8/131857305/mavevu-pomeja.pdf
    • https://dafavazama.weebly.com/uploads/1/3/4/8/134893815/zojejawu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://9e6c4f0b-3406-4274-bf8a-5be7f948d240.filesusr.com/ugd/45c6ff_e5e76643b160417888185df5a9158bd5.pdf?index=true
    • https://6363ce23-9394-4102-a476-7be320345719.filesusr.com/ugd/7c41c1_d65598e76b5148bd9970ebe42add0645.pdf?index=true
    • https://141ebdc9-a3c9-4c6d-b8f9-366dbf139dec.filesusr.com/ugd/46bfb0_e01646032a664f19be58a0a2deb08d7d.pdf?index=true
    • https://154530d8-637b-49d0-b90a-43bf07a176fb.filesusr.com/ugd/59359a_cf059d17eb664fb1abdcb2d86e4c2985.pdf?index=true
    • http://nizarajizigutut.epizy.com/xosafebujorivewuferuwokuf.pdf
    • https://23751d96-d7b3-42ca-b8ca-e459b671ea95.filesusr.com/ugd/7de994_c3d3f80280174c8bb6be9c23b97e0f51.pdf?index=true
    • http://pudevagaradala.epizy.com/contexto_social_de_la_profesion_libro_uanl.pdf
    • http://babijegogaluz.epizy.com/alan_gratz_allies.pdf
    • http://nogevewibavulur.epizy.com/32577635128.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_off0000f9ab.bin
e5661a486b6740c7b75938c1c3e32a41d09cc09b6656bd02be93317525ce3328		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF9AB 4944 bytes
font_01_sfnt_off00010a82.bin
2132aa01cd7eb022dd33a1622af06b1c044c2ba089a58754bda9124afda9f1f7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10A82 11380 bytes
font_02_sfnt_off00013137.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13137 4324 bytes

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