Malicious PDF — malware analysis report

Static analysis result for SHA-256 41c779e289afcd03…

MALICIOUS

PDF

75.3 KB Created: 2021-03-31 08:09:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4827ff01a94916ca7c75f7ec7a02cb94 SHA-1: dcd4dd7e16132b01f7ff168db700a680edec25bb SHA-256: 41c779e289afcd03058a0f6666dcb083f683c7efb5149fe11442b2a14a7bdf76
96 Risk Score

Malware Insights

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

The file is a PDF containing an embedded URI pointing to a suspicious domain, identified as malicious by ClamAV and an ML classifier. The document body, though heavily obfuscated, suggests a lure related to an 'Audi a4 2020 brochure pdf'. The presence of multiple unknown and potentially malicious URLs indicates a phishing or malware distribution attempt, likely delivered via spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 4

  • 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://vilenefex.ru/award?keyword=audi+a4+2020+brochure+pdf
    • https://static.s123-cdn-static.com/uploads/4421354/normal_5fe5c5bbb0b9b.pdf
    • http://idealslimitalia-oficial.site/linksys_wrt54g_setup_wizard_downloadvx4p9.pdf
    • http://jedugefipevama.iblogger.org/anthony_de_mello_the_way_to_love_quotes.pdf
    • http://cabinetsly.xyz/beleminuzevafl2ez.pdf
    • http://bebenomilu.22web.org/27640835118.pdf
    • http://beststudent.fun/fikazawukugodulesu5v4bm.pdf
    • https://static.s123-cdn-static.com/uploads/4381340/normal_5ffe9127340c5.pdf
    • http://ighelpcenter.xyz/grammar_practice_worksheets_for_class_8hdnjx.pdf
    • https://static.s123-cdn-static.com/uploads/4421205/normal_5fdd62be7d4ec.pdf
    • http://rejuxipo.iblogger.org/bmw_e46_330i_auto_vs_manual.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/cfeaee57-1ff9-429e-905f-9d2fa5727d32/what_is_the_hating_game_about.pdf
    • https://bf130ee1-1463-4c69-9604-1b23772ced92.filesusr.com/ugd/b4609a_6c9beb4a08744e7f8641f4457b65b352.pdf?index=true
    • https://36fc1fe3-b646-4cc1-b6e9-de51469aea27.filesusr.com/ugd/3eb4bd_0caa383ed072448e90300580cc998373.pdf?index=true
    • https://b1e6e3cd-24a2-426a-8b7d-e8f4bd81915b.filesusr.com/ugd/83e584_0d3dcec3c851485f9979812e4b3b707e.pdf?index=true
    • http://milodip.epizy.com/18940294014.pdf
    • https://uploads.strikinglycdn.com/files/4c76aece-9301-4beb-a68a-f71e2200bac8/reloj_casio_2747_aw-81.pdf
    • https://uploads.strikinglycdn.com/files/a7432c61-454c-407e-bc2e-f64f0dc4945d/19889870097.pdf
    • http://vawekud.epizy.com/5305476810.pdf
    • http://ralorepozariti.rf.gd/oxford_discover_2_student_s_book_download.pdf
    • http://fomipituvopib.epizy.com/estrus_in_cattle.pdf
    • http://mukoluduxoge.rf.gd/sheetz_near_me_address.pdf
    • https://uploads.strikinglycdn.com/files/e5c275dc-d685-4dd1-a8b8-e91156ea9773/tissot_touch_2_expert.pdf
    • http://nuzinigezabab.rf.gd/producer_equilibrium_in_economics.pdf
    • https://d09251a9-b09e-4077-8ccb-24037f005f7b.filesusr.com/ugd/a6ce17_7d705dc437ce4346927662f1c95101d6.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_off0000d0c2.bin
c977114574cb705ffecffb30ad82d5af15db6d4bd95adbebd61dc357097309c3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD0C2 5524 bytes
font_01_sfnt_off0000e388.bin
6212081bf7005ef331728333d049d83a11ac92354696525cefbbe98c9b69e081		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE388 10676 bytes
font_02_sfnt_off0001081e.bin
fb36930b6158726aadc5cec8e2937717261789c1ed468292f33a1ffb1951f124		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1081E 16172 bytes

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