Malicious PDF — malware analysis report

Static analysis result for SHA-256 d39a36cc65f5782e…

MALICIOUS

PDF

73.9 KB Created: 2021-03-08 22:54:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 9b262d9f8c3cc9dbe9c8375cc6f6870a SHA-1: 868a6dff8c9da7924b12833cf117cb114fec93fd SHA-256: d39a36cc65f5782e023cd5d7db6fbc37541542be5eca2c1cbd8fc1fe43a16a45
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to a phishing URL. The ML classifier also strongly flagged this PDF as malicious. While no scripts were extracted, the presence of a malicious redirector indicates an attempt to lure users to a phishing site, likely as part of a spearphishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://crophysi.ru/wix?keyword=lasermax+guide+rod+laser+glock+43 In PDF document text
    • http://butojaxutaj.22web.org/4869654174.pdfIn PDF document text
    • http://meetdouche.xyz/baby_pack_n_play_bassinet_sheetsrnmye.pdfIn PDF document text
    • http://anarchymedya.com/716474549777qtcj.pdfIn PDF document text
    • http://thailandlove.site/150389632225bwmz.pdfIn PDF document text
    • https://cdn.sqhk.co/tavedikovo/higfPgh/wolfychu_real_face_reveal.pdfIn PDF document text
    • http://gradstroy.su/kodunafuh02cd.pdfIn PDF document text
    • https://cdn.sqhk.co/fapiwejagiz/kggaqif/lightroom_filters_app.pdfIn PDF document text
    • http://shoppingyxplus.xyz/vunujaragelusezezurenaralgfdx.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://89f68ddc-9f98-4e60-8afa-3e0ca6603e9e.filesusr.com/ugd/4725f1_ed66c0bd18994c09ae9272cc705f5072.pdf?index=trueIn PDF document text
    • https://dbb1fad9-9c05-458f-9e32-bc0b7f65d7ec.filesusr.com/ugd/451461_1952fa10067e43ecb3b70ec102ce4f9e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dedinavesute/nutijar.pdfIn PDF document text
    • https://s3.amazonaws.com/senodiw/technical_drawing_with_engineering_graphics_free.pdfIn PDF document text
    • https://s3.amazonaws.com/jesidofefe/the_screwtape_letters_play_review.pdfIn PDF document text
    • http://nimuwixoxuwe.epizy.com/who_manufactures_kindle.pdfIn PDF document text
    • https://e5447efa-8854-4d04-834e-f0bbd7438c8b.filesusr.com/ugd/ac612b_f19eebc6acb747c2b769dabc46fb7d47.pdf?index=trueIn PDF document text
    • http://zopibekaboxopa.epizy.com/introduction_to_operations_research_9th_edition_solution_manual_download.pdfIn PDF document text
    • https://s3.amazonaws.com/jusuberu/mixovubukaw.pdfIn PDF document text
    • https://s3.amazonaws.com/bulolimepol/xovebitex.pdfIn PDF document text
    • https://s3.amazonaws.com/juduk/pneumococcal_vaccine_guidelines_cdc.pdfIn PDF document text
    • http://waraxiv.rf.gd/jatebovexemuvemo.pdfIn PDF document text
    • https://43a2ba88-5de9-465b-b95f-6a4d82f2d06e.filesusr.com/ugd/dcbeda_e1c1c8026ca042d895c8d2c9074ed96b.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e1ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1ED 5584 bytes
SHA-256: e94a04e9223b568052517585c2a8641b3cf873416fc5afe1e43ec34f1bd97496
font_01_sfnt_off0000f4ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4EA 10868 bytes
SHA-256: 8fa238519197bfb72db1e5eb11e6d8f302be8a7cad36179d9a0af0c7d11a532e

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