Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b8c60b6726bf566…

MALICIOUS

PDF

78.2 KB Created: 2021-03-13 13:42:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6075c268a6b7ec9e1b8ef84a4d5b4730 SHA-1: ef07169503c2695b7c2034127c91dca19bb983df SHA-256: 8b8c60b6726bf5664460258f31941d33dd1f77cad433a688e68d72869722d584
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with one heuristic specifically identifying a 'PDF_SEO_LINK_FARM'. The primary malicious URL, https://xezojetit.ru/aws?utm_term=can+you+trade+binary+options+on+weekends, suggests a phishing or scam attempt related to financial trading. While no scripts were explicitly extracted, the PDF structure and the presence of external links strongly indicate a malicious intent to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://xezojetit.ru/aws?utm_term=can+you+trade+binary+options+on+weekends
    • http://mekuwomusaxonod.22web.org/rose_gold_leaf_sheets_edible.pdf
    • https://static.s123-cdn-static.com/uploads/4414515/normal_5ff9bc0c150b6.pdf
    • http://meetplafond.xyz/4118049058u5q5k.pdf
    • http://bogplaktnc.fun/fluid_power_with_applications_7th_edition9nz7u.pdf
    • https://sexevegafuxa.weebly.com/uploads/1/3/6/0/136083832/kapidabosimixebim.pdf
    • https://sukanogijero.weebly.com/uploads/1/3/4/3/134333185/lodugejogawe.pdf
    • https://cdn-cms.f-static.net/uploads/4499319/normal_6023645f4c761.pdf
    • http://healthit.space/denododowovnds.pdf
    • https://luketekovagitor.weebly.com/uploads/1/3/4/2/134236109/b959f80cef826.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://3f9320ff-391d-49df-b192-c557e211a93c.filesusr.com/ugd/469aea_67b74d91319443b59fc09a1ee7732a78.pdf?index=true
    • https://uploads.strikinglycdn.com/files/453e8f66-08f8-4740-8a0f-087f8c2747b5/toyota_corolla_2016_led_lights.pdf
    • https://uploads.strikinglycdn.com/files/324e14b5-eff4-4985-ab3b-de3f4885c552/how_to_install_a_netgear_n300_wifi_range_extender.pdf
    • https://436c154b-1c2d-4c60-9768-ed3a268ef5e1.filesusr.com/ugd/e8e253_299c80401fe34f2b970895e298c47704.pdf?index=true
    • https://c931c956-7f53-4e4e-96dc-27d7f003ba63.filesusr.com/ugd/b80c10_8dac324fbc7b4a5da96856b90b96f74c.pdf?index=true
    • https://dacf5b84-f80e-4bd8-bb7f-22aad20a1cd8.filesusr.com/ugd/285be4_47ba1458de4347c490b1a7e8fe03d197.pdf?index=true
    • http://juwijez.rf.gd/clark_forklift_cgc25_manual.pdf
    • http://fopekexu.epizy.com/galigilarafadezemad.pdf
    • https://uploads.strikinglycdn.com/files/3c49c39f-52b5-4b5a-9c59-9bc692c04154/mudawawapate.pdf
    • https://b56e00ce-d729-42e9-814b-b9a4b194f5ba.filesusr.com/ugd/f6f93f_0960b9050e6049c3b6c98005428d98e5.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f5a1.bin
aee1b2d1b3a5d646f6cc94c8f5a1b8c68de9c9720adf3c35470aaf196259039b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF5A1 5224 bytes
font_01_sfnt_off00010788.bin
27bd3df17b0a86c83efd1863842e42b329ff547109ec31714ceff5203d5fd9f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10788 10636 bytes

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