Malicious PDF — malware analysis report

Static analysis result for SHA-256 94075aca148595ad…

MALICIOUS

PDF

81.0 KB Created: 2021-04-01 01:48:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5bbcb9db0a3e626220eab8c20bf05dbc SHA-1: aa13be4467a17e09b96307e043abdcb81004e41e SHA-256: 94075aca148595adf79f89bd904aceef675617524b7ca44870afdaa1e399a07a
156 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high probability of malicious intent. The file contains a large number of external links, suggesting a link farm or phishing attempt. The document body, though heavily obfuscated, appears to be a lure for a 'free download' of a book, which is a common tactic for distributing malware or leading users to phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://kuzutuzo.ru/aws?utm_term=the+lost+art+of+good+conversation+pdf+free+download
    • https://cdn.sqhk.co/jogekiluse/Oghgjif/disney_premium_access.pdf
    • https://pofitefe.weebly.com/uploads/1/3/4/6/134617546/4d02f40.pdf
    • https://cdn.sqhk.co/kafufojugure/gwt7geE/gamolimugibonemit.pdf
    • http://gk-kuban.ru/linear_equation_word_problems_worksheet_algebra_2m1vjj.pdf
    • https://nivumumati.weebly.com/uploads/1/3/4/7/134703955/pudenujipijezi.pdf
    • http://uplrezina.site/why_is_my_traxxas_blinking_red_and_greenh2x1n.pdf
    • http://selectgetc.top/axial_scx10_3_gladiator_bodykzwfb.pdf
    • https://cdn.sqhk.co/betewulo/hgqgjjj/51338304282.pdf
    • http://fallofelin.online/la_tecnologa_educativa_como_disciplina_pedaggicamfhu0.pdf
    • https://lubuvaludufaf.weebly.com/uploads/1/3/5/9/135981644/7899031.pdf
    • https://cdn-cms.f-static.net/uploads/4481819/normal_601a824cf3a5f.pdf
    • https://guroposuz.weebly.com/uploads/1/3/4/4/134469393/jotelagejavenip_kewetovemulew_wiwipowonupova.pdf
    • http://kmplitka.shop/jivukagunixi2w0rj.pdf
    • https://cdn.sqhk.co/mojafefegamo/cl7PdBb/tooncam_cartoon_pencil_sketch_picker.pdf
    • http://liketime.online/installing_thermador_fridgettlti.pdf
    • https://static.s123-cdn-static.com/uploads/4459787/normal_5ff08e5925f35.pdf
    • https://nusoselif.weebly.com/uploads/1/3/4/4/134470887/7904376.pdf
    • https://cdn-cms.f-static.net/uploads/4425728/normal_605d6a7675794.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://7ef5d8b8-74ac-4e0a-b0a0-fa61ca6462a8.filesusr.com/ugd/23e9be_4206664fdfc2407bbaea79912be306c6.pdf?index=true
    • https://770603ce-cae8-48b7-b4e8-6e15b9dac1cd.filesusr.com/ugd/e975af_e65cc49c47b54c90aa6167a03c8d711a.pdf?index=true
    • https://0793e221-2e7e-4176-aae8-4ff4b75d8f7a.filesusr.com/ugd/64bd79_35eafc46540a4cf3886c5523e75f41a5.pdf?index=true
    • https://1c54689f-8f60-44d8-8d81-b144d6ea8ada.filesusr.com/ugd/787b0a_194f11a216aa4829bef270a594d34991.pdf?index=true
    • https://7f3dc8b3-869c-44c5-82eb-14ae88d57796.filesusr.com/ugd/dc4ca1_27d72d4e48064423b16600ae9e2bf32b.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_off0000fc26.bin
983085c9b5e3b1db985c74b9d9e7df463169afb6b386aeb805cb87da645ba4e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFC26 5520 bytes
font_01_sfnt_off00010efa.bin
5b121ecad52e3a9f1f9471b910c7a9d5cb854517c9eb4dab428e695559e27fb6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10EFA 11896 bytes

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