Malicious PDF — malware analysis report

Static analysis result for SHA-256 f226fb54fab06564…

MALICIOUS

PDF

84.3 KB Created: 2021-03-14 02:07:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0d8a800f6a0fac11773326cc60bd3d61 SHA-1: 76483bde8c0129193edd8a2afb8006aa54a13d0b SHA-256: f226fb54fab06564fb8ec78ffcd42c9f71e672c3384645b3158aa9b0a04c7528
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many of which are associated with SEO link farms, suggesting a phishing or malware distribution attempt. The embedded URLs point to suspicious domains, and the ClamAV detection as 'Pdf.Phishing.Trojan' strongly indicates malicious intent. While no scripts were explicitly extracted, the PDF structure and heuristic firings suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://jacksth.ru/wix?keyword=brooklyn+college+academy+logo
    • https://jafobepajimo.weebly.com/uploads/1/3/4/8/134881918/aadf9.pdf
    • http://lobubomevan.22web.org/adobe_illustrator_cs6_free_zip_file.pdf
    • http://maykistore.ru/44624710471n5xq3.pdf
    • http://galabogenezoso.getenjoyment.net/metodos_de_busqueda_de_informacion.pdf
    • http://trelon.fun/abit_ip35_pro_error_code_c165o73.pdf
    • https://guduzuzej.weebly.com/uploads/1/3/1/6/131606672/kakitar.pdf
    • http://fiwisud.getenjoyment.net/ford_555d_backhoe_service_manual.pdf
    • http://vivekawiga.sportsontheweb.net/blackdecker_4_slice_toaster_oven_stainless_steel_to1700sg.pdf
    • http://jekenufakewe.mypressonline.com/netowewedaroxifiw.pdf
    • https://jesasifewom.weebly.com/uploads/1/3/1/4/131453969/c09c868e.pdf
    • http://patajafurep.mywebcommunity.org/85992659591.pdf
    • https://zeruposizagaki.weebly.com/uploads/1/3/4/8/134854722/644320a5.pdf
    • http://douchehq.xyz/gijukawa2viqi.pdf
    • http://salonlabs.xyz/86537765165bjwom.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://db6d201d-bdff-4648-9982-d9cfaac7639e.filesusr.com/ugd/98857b_cd95bb46fe1a4f70841ef676237b623d.pdf?index=true
    • https://c46c713f-5e69-4c64-aad4-d86f29440f76.filesusr.com/ugd/957c7b_bcf25615042a4c7593cdc8824888b96a.pdf?index=true
    • https://7ef7ebf0-bcb0-4ca2-8538-5a19c3e9f01c.filesusr.com/ugd/aff7ca_3f4d09c4b5a74da9aecaf4efd2625aa1.pdf?index=true
    • http://mizujem.epizy.com/10475684351.pdf
    • https://af1bea64-f5cd-41c2-a7c1-97f21c1aa057.filesusr.com/ugd/592671_7b039fd560a640b7a4a5e6b924092f06.pdf?index=true
    • https://a43ab9c2-5efb-4cee-ac06-b782a0f5e207.filesusr.com/ugd/4826f5_d1c574d9e7914ecc9e5ba84418903dd4.pdf?index=true
    • http://sagalesokalu.epizy.com/wakujugolavuli.pdf
    • http://fotopokidag.epizy.com/83343135461.pdf
    • http://deriwabip.epizy.com/journal_of_magnetic_resonance_imaging_author_guidelines.pdf
    • https://36622f5a-5a1b-41a5-aa98-965156e47ac2.filesusr.com/ugd/804ff6_7c8e0eae39b94acf87689f6153531270.pdf?index=true
    • https://73f4d879-981c-49fe-abc7-520f36a14a84.filesusr.com/ugd/b77b08_7c3599925615495bafe9dfda6f0c7a01.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fc4d.bin
3c399b94ffe0e264ce6b648c7f424613b3aac5be473680b67f72e6e148db37d5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFC4D 4956 bytes
font_01_sfnt_off00010d0a.bin
4db9ec61a210d784b7fdd53dc415d61c31d65688dd3800bf0fd0cbe2e41f49be		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10D0A 11892 bytes
font_02_sfnt_off00013551.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13551 4324 bytes

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