Malicious PDF — malware analysis report

Static analysis result for SHA-256 592c092f456c9343…

MALICIOUS

PDF

80.4 KB Created: 2021-03-20 08:57:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 096ef3d20693b3761005962b82ad3e30 SHA-1: 3348ab7b50c9f838fce918a6aca0373ba534400c SHA-256: 592c092f456c93435a29bba94a2b115e4e79c509c2d38a204a7b5029f2395093
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, a technique often used to distribute phishing content or redirect users to malicious sites. The ClamAV detection and ML classifier strongly indicate malicious intent. While no scripts were directly extracted, the PDF structure and embedded URLs suggest it's designed to lead users to potentially harmful content, possibly as part of a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://botokaw.ru/strik?utm_term=we+the+animals+book+characters PDF link annotation
    • http://galufixagomedo.getenjoyment.net/fexurefanoke.pdfIn PDF document text
    • http://aycotoro6.xyz/71446562570jj1cy.pdfIn PDF document text
    • http://datovufes.scienceontheweb.net/surepedogota.pdfIn PDF document text
    • http://rubyshup.space/9309514596318jds.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xiwozoget.atwebpages.com/87047915162.pdfIn PDF document text
    • https://850a36a1-966c-46c3-86ed-e15bcb5778a7.filesusr.com/ugd/ede58b_0cb20b76d1b04407892d02311d3afcb7.pdf?index=trueIn PDF document text
    • https://72b50e20-f79f-40ca-96b4-24bef83e308f.filesusr.com/ugd/1a1092_168342d4c35a4ee2987d78e8d6f73a87.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/belapawerezuju/alexander_cunningham_books.pdfIn PDF document text
    • https://s3.amazonaws.com/sazixipame/cahills_vs_vespers.pdfIn PDF document text
    • https://s3.amazonaws.com/pujirageg/43491951648.pdfIn PDF document text
    • https://s3.amazonaws.com/vavebufevodutob/2019_kenya_census_job_application_form.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a2663ca7-dbf0-4326-8acd-af876000355e/87511335504.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ea3eb5d9-d75e-455a-9e1a-a7829d198b96/atlanta_nights_quotes.pdfIn PDF document text
    • https://cd70d4e5-4a1a-4071-96d1-f2415ea5ece1.filesusr.com/ugd/7f46b5_be5496068dd94fce971ef4f055180337.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sonutopexaramuf/free_educational_games.pdfIn PDF document text
    • https://d52369c8-37f2-40d9-9d5f-d682b3b4a2e4.filesusr.com/ugd/6d5a7b_90405c1ab4e24ae899f2b9733d460f4b.pdf?index=trueIn PDF document text
    • https://24218389-b518-4ca3-8548-65eaf758daa4.filesusr.com/ugd/c836c3_1c6349862b9945da87d5fdfb248bb94a.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/37d2ea9c-c033-4762-a4c0-a67100cca2ea/57502770822.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b9e418e9-fa5a-4547-962e-4858be2c288e/kijibezafenomofifugosow.pdfIn 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_off0000fdee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDEE 5256 bytes
SHA-256: a31075dd880701ad88b0ef5ff8e484a41f67d8361b1350606c431b5c0db8c0b8
font_01_sfnt_off00010fae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FAE 10992 bytes
SHA-256: 9537fa549f11acb09ab7a397860dec0296e588b6a4908a7c6cc9b63221310390

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