Malicious PDF — malware analysis report

Static analysis result for SHA-256 06d3b4b8a58d93d3…

MALICIOUS

PDF

81.2 KB Created: 2021-09-02 08:30:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 800475ea09d88ededbab9b495366bbcb SHA-1: 879f40fb7e800d9b34c5dd3efd0ccf60c23d0225 SHA-256: 06d3b4b8a58d93d31587b5d3d795cd2967fe1e0b8be7290eaccc0df351557279
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by multiple heuristics as malicious, including a high-confidence ML classifier and ClamAV detection. It contains a link farm pointing to compromised CMS upload storage, suggesting an attempt to lure users to malicious content. The presence of numerous unknown URLs hosted on various domains indicates a phishing or redirection scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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 http://omniatel.it/wp-content/plugins/formcraft/file-upload/server/content/files/160745ea470cff---45532292651.pdf In PDF document text
    • https://www.idromeccanicasrl.com/idromeccanicasrl.com/wp-content/plugins/super-forms/uploads/php/files/0795cae639efb74be81fcd4f3a6fec91/28720967180.pdfIn PDF document text
    • http://haphadoor.com/upload/files/wituzosuvesobotugozak.pdfIn PDF document text
    • http://alarmy-kamery24.pl/userfiles/file/4618809886.pdfIn PDF document text
    • http://localhomesales.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160c5a087b7d89---11343244078.pdfIn PDF document text
    • https://www.elitelawnsolutions.co.uk/wp-content/plugins/super-forms/uploads/php/files/jjld72l7s62e8eueujur4rsk77/14053699919.pdfIn PDF document text
    • https://sirikulsteel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609655bec0ab2---66550686527.pdfIn PDF document text
    • http://farmina.ru/uploads/files/87542109897.pdfIn PDF document text
    • http://eros-arena-reutlingen.de/eros/userfiles/file/dusesowilelolerefijisise.pdfIn PDF document text
    • http://associacaoguainumbi.org.br/wp/wp-content/plugins/formcraft/file-upload/server/content/files/160716344af189---rizaziloledapazabijaxe.pdfIn PDF document text
    • http://triumphtoday.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606f2ac5bdc15---lusolitowubutawog.pdfIn PDF document text
    • https://admonks.ru/wp-content/plugins/super-forms/uploads/php/files/583358bc3a6ea222feeaa2606089be96/6787445760.pdfIn PDF document text
    • http://fullcolorspandoeken.nl/userfiles/file/19089787432.pdfIn PDF document text
    • https://mamproducciones.es/wp-content/plugins/formcraft/file-upload/server/content/files/16083d9ff20451---66653197296.pdfIn PDF document text
    • http://www.fullertherapy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e86bf74da9---figilosolosobeposom.pdfIn PDF document text
    • http://aftckwt.com/uploads/file/95607276380.pdfIn PDF document text
    • http://gandolfiarchitetti.com/userfiles/files/jinosifoxupitozipefal.pdfIn PDF document text
    • https://ms2gacor.com/contents/files/48492824410.pdfIn PDF document text
    • http://hantechwelding.com/userfiles/file/2021082322072573499.pdfIn PDF document text
    • https://sportli.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160a4d06e15443---94816938331.pdfIn PDF document text
    • https://www.lightingdynamics.com/wp-content/plugins/super-forms/uploads/php/files/4edbc4d7bbec193a0d6994ac3bf41e8e/zapavitus.pdfIn PDF document text
    • http://cricalliance.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080b2cae45f1---tevuk.pdfIn PDF document text
    • http://gesundheit-im-blog.de/userfiles/file/kitonabazifesofumu.pdfIn PDF document text
    • https://lifecareproduct.in/ckfinder/userfiles/files/76389650099.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=pdf+photo+to+excel+converterPDF link annotation
    • 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dabb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDABB 17264 bytes
SHA-256: ccabe40fc7458d9d5b18a852b8998b6e4a373472f4078e230926113650a90e90
font_01_sfnt_off000107eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107EB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012002.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12002 10464 bytes
SHA-256: 877b2f730ab70801856c01b1ee76ed1dddd193027b6f2690ee1e2c03fc2a6ddb

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