Malicious PDF — malware analysis report

Static analysis result for SHA-256 30fe6c8f26044535…

MALICIOUS

PDF

80.1 KB Created: 2021-09-15 17:05:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 35bfb3eb44cb9110c7b2532048adc343 SHA-1: 0ee1d73c675df45521e1b9f10bdb2fd1adcdcffe SHA-256: 30fe6c8f260445357d126d3cac0d91d9fa74ecee6a205e5e468f5d2c2dfb136f
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised or disposable hosting. Heuristics indicate this is a link farm designed to direct users to external content, with ClamAV identifying it as a phishing trojan. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

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 https://mtestbd.com/assets/uploads/files/dogam.pdf In PDF document text
    • https://knoxvilleremembers.com/media/xorebedudaj.pdfIn PDF document text
    • http://xn--j1aii.su/userfiles/file/kovubenofemapukono.pdfIn PDF document text
    • http://cicm2015.mist.ac.bd/app/webroot/ckfinder/userfiles/files/zuzomosadimu.pdfIn PDF document text
    • https://ilonew.tasksplan.com/userfiles/files/fazewidogomivapegew.pdfIn PDF document text
    • http://rileyillustration.com/images/agency/files/71570709167.pdfIn PDF document text
    • http://cjatkinson.com/userimages/jipujavuxi.pdfIn PDF document text
    • https://aslplastic.com/ckfinder/userfiles/files/87858141747.pdfIn PDF document text
    • http://elitaliaweb.it/upload/file/54241361830.pdfIn PDF document text
    • http://punaide.com/userfiles/files/41265753952.pdfIn PDF document text
    • http://labuchedeberce.fr/userfiles/file/satowekodozifamowo.pdfIn PDF document text
    • http://thongthien.vn/upload/files/31123773671.pdfIn PDF document text
    • https://chicagoportablexray.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132462ab43fc---kaxolodexofipogeduguvok.pdfIn PDF document text
    • http://pogologistics.com/ckfinder/userfiles/files/falovaberi.pdfIn PDF document text
    • https://smwebtechnology.com/arishayurveda.com/userfiles/file/lideri.pdfIn PDF document text
    • http://king-pro.com/userfiles/files/negosanexevuke.pdfIn PDF document text
    • http://gingerwooddesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/161357c646c8d6---budogasovobomelexova.pdfIn PDF document text
    • http://centromedicoveterinarioadda.com/userfiles/files/58437055434.pdfIn PDF document text
    • https://rhuyscampingcar.fr/images/files/nudavolox.pdfIn PDF document text
    • https://www.davinci.dk/wp-content/plugins/formcraft/file-upload/server/content/files/16141a271e1fb4---42617418995.pdfIn PDF document text
    • https://maidintown.co.uk/wp-content/plugins/super-forms/uploads/php/files/e81818b0d1c284f786f921dd61451329/56502621932.pdfIn PDF document text
    • https://salondumariagededijon.com/userfiles/file/salijebimurabulaf.pdfIn PDF document text
    • https://myclubowners.com/userfiles/files/38482835383.pdfIn PDF document text
    • http://mini-garden.ru/userfiles/file/54010212157.pdfIn PDF document text
    • http://klick-tipp.info/ckfinder/userfiles/publics/files/bujutaveximewofaxiteju.pdfIn PDF document text
    • http://kibunajcc.com/ckfinder/userfiles/files/99522661819.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=how+do+i+do+a+3+way+facetime+callPDF 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_off0000d4ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4CA 17636 bytes
SHA-256: 9ac1cfa88a36c85915237a53ad4d608c2215536264b0638294df4f05cb79c340
font_01_sfnt_off00010265.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10265 10628 bytes
SHA-256: a9c8c1c497fce395b775c570d85c035134de232f1b63f85e5b0af411d0211f47
font_02_sfnt_off00011aca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11ACA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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