Malicious PDF — malware analysis report

Static analysis result for SHA-256 d39611e305c5e5aa…

MALICIOUS

PDF

86.5 KB Created: 2021-03-19 23:19:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 42e1813ddb683238a2ff0fa1731be02f SHA-1: 59fa2b4ae5771e5c028887ecb8fc4db6c3df30a6 SHA-256: d39611e305c5e5aac32b085d530ab288f518f1c2cf88064423e84438cdcebc38
104 Risk Score

Malware Insights

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

The file is a PDF document that uses a fake invoice lure to trick users into clicking a malicious URL. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded URL is the primary indicator of compromise, likely leading to a phishing or malware download site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://jumiwimov.ru/123?utm_term=verizon+payment+card+industry+compliance+report
    • http://dotuzodozo.22web.org/am_i_joke_to_you_meme_template.pdf
    • http://yewes.fun/link_health_app_to_discovery55vqc.pdf
    • http://sluzhba1.net/how_much_money_do_i_need_to_start_trading_stocks_in_india6nts1.pdf
    • http://devgame.design/24941036558afqhk.pdf
    • https://static.s123-cdn-static.com/uploads/4465685/normal_5fe3ecf7cb230.pdf
    • http://profyhouse.ru/fubepakoneli6xex.pdf
    • http://coolstudent.space/formica_laminate_flooring_installation_guidemyr33.pdf
    • https://cdn-cms.f-static.net/uploads/4447265/normal_602162dce4ec5.pdf
    • https://cdn-cms.f-static.net/uploads/4382631/normal_604ac994913f1.pdf
    • http://crawlmqyu.space/what_is_a_sextant_used_to_measurelj5gg.pdf
    • http://maewallace.com/pro_forma_income_statementdwlvy.pdf
    • http://wogizejelalod.iblogger.org/31701084754.pdf
    • http://bobr.space/learn_python_programming_by_making_a_gamewevsw.pdf
    • https://static.s123-cdn-static.com/uploads/4401546/normal_5ff6528e7e156.pdf
    • http://bilet-pdd.site/106605016547i0p5.pdf
    • https://static.s123-cdn-static.com/uploads/4459320/normal_5fca4bff3086b.pdf
    • http://startask.ru/what_do_you_call_someone_without_a_conscienceth5qw.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://51f47fa2-20f7-4ec4-bb91-8ae4aee689b4.filesusr.com/ugd/917232_e7df117ff1f34ea5a0b78be1a9b7ca29.pdf?index=true
    • https://c78ffd2e-fc3d-4272-86ca-968d835fb7ad.filesusr.com/ugd/0f9ef0_8cf016ae285446488d1ba33b493b2e00.pdf?index=true
    • https://e055bcc9-c4f1-4c6c-8dcb-0912bf54750f.filesusr.com/ugd/b4a829_5069eb7fe5cb43488a220ee7c658f802.pdf?index=true
    • https://2e03c77f-99cc-4591-9807-54d8d49c9ce6.filesusr.com/ugd/759733_2c6cde9c803f409da96aaa8895acf73a.pdf?index=true
    • https://288dffde-0386-48bd-adba-b069b5f3b70f.filesusr.com/ugd/7e1b39_7078dcaf406a4dbc8120ce3cd68589f7.pdf?index=true
    • http://xikimafelote.epizy.com/srs_airbag_system.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_off000104bd.bin
a703038a430ddc4fbb9b1758137e343216aff1112278fe847f9778b24e858b9a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x104BD 5216 bytes
font_01_sfnt_off00011666.bin
7aff7a73e659d8d5b39d9ba7e4ba7f61e6279c651a51e7b14dcf970dccefd357		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11666 11580 bytes
font_02_sfnt_off00013df4.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13DF4 4324 bytes

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