Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c44d8e1c508d539…

MALICIOUS

PDF

299.1 KB Created: 2021-03-24 17:18:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 676ec2da1785b23fe21f34e066e9c8c0 SHA-1: 87ac07f41c32014dbd2f17f1449dc6f38b1c9db8 SHA-256: 0c44d8e1c508d539b3f9f7330d4f31ae6f5be0a2ebee209d850095ae35e6c4cd
104 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier, with heuristics indicating the presence of external URIs and urgency lures. The document body, though heavily obfuscated, contains strings related to a game release date and application names, suggesting a lure. The embedded URLs point to potentially malicious domains, likely serving as part of a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9950

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://zajinet.ru/wix?keyword=unturned+4.0+release+date PDF link annotation
    • https://lisiruzefixa.weebly.com/uploads/1/3/4/4/134495270/c03abe.pdfIn PDF document text
    • http://dududuw.mypressonline.com/riwupajuguro.pdfIn PDF document text
    • http://pidagenavuziw.mywebcommunity.org/fejesonedumikuwifit.pdfIn PDF document text
    • http://zzzmmmmejjj.space/detailed_design_documentn999r.pdfIn PDF document text
    • http://farvestnn.ru/gevipobebotuxirewumoxyk5a.pdfIn PDF document text
    • http://bionatur.space/harry_potter_and_the_sorcerers_stone_book_chapter_17dvjef.pdfIn PDF document text
    • https://rimofemosi.weebly.com/uploads/1/3/4/3/134351632/f9a3ea1.pdfIn PDF document text
    • https://fiwugepupuladav.weebly.com/uploads/1/3/4/7/134740110/7984403.pdfIn PDF document text
    • http://dwatches.site/69169184987nlyhb.pdfIn PDF document text
    • http://frontglass.xyz/relorixefdd0n.pdfIn PDF document text
    • http://sunakijabe.sportsontheweb.net/13734550530.pdfIn PDF document text
    • http://dewisazovuvoxi.mywebcommunity.org/dukevoruzazufizu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://944456f3-75eb-4cd6-bbfd-656b3713ada1.filesusr.com/ugd/2c8d66_2eb360b72bea4e0dae8d409e1c612530.pdf?index=trueIn PDF document text
    • https://168d2a81-f750-40c6-a653-3787650f980d.filesusr.com/ugd/3bcfef_05165319ab3e4054a14bb64973da679d.pdf?index=trueIn PDF document text
    • https://6d4a8fb0-9a8a-4850-8aa1-2b5706121c9a.filesusr.com/ugd/ff2e72_326b290f3dc644e1beed27d1df2eda99.pdf?index=trueIn PDF document text
    • https://8fc1c2d6-49ba-4d63-8b95-0327ef2b1627.filesusr.com/ugd/1849a1_dd6a975cbbfb41e7af75c1681806d043.pdf?index=trueIn PDF document text
    • https://e6b56e3c-1b88-4cfb-972d-ab1702b0a06e.filesusr.com/ugd/8c0e65_8cdb28f3b40047d7a353d043d257aaac.pdf?index=trueIn PDF document text
    • https://e824aeac-d22a-4b45-bb3c-17051d6ee04f.filesusr.com/ugd/de60da_e78087c156234e6cac09154dc6491785.pdf?index=trueIn PDF document text
    • http://lebusepuwiri.atwebpages.com/sibimefute.pdfIn PDF document text
    • https://ed21222e-fee3-4fab-8b52-e2ddb7bb35ab.filesusr.com/ugd/e73fea_c892f65e661a4b0a8b3cac0907d5e6c3.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000452ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x452CA 3872 bytes
SHA-256: 7acd2a6a5b2114ceba737707c2e1c89aa66ae555bf49183b19b3263b65a05b41
font_01_sfnt_off00046080.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x46080 5072 bytes
SHA-256: 8a3fe3ea78041f88ef7e76db3010067f8176c1387fe6d1e61cefeb0ce6cca716
font_02_sfnt_off000471d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x471D9 12988 bytes
SHA-256: 5ee5d7289fb70abc7dfc94e7a348b85ad06d94dfeba359b770de27dee5797403

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