Malicious PDF — malware analysis report

Static analysis result for SHA-256 5bc01e8da6ba3f2b…

MALICIOUS

PDF

83.0 KB Created: 2021-09-05 09:32:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 49c94fece85642d90a15551af1fb67dc SHA-1: fde72733268450e98133810f0165dd17dbd8007f SHA-256: 5bc01e8da6ba3f2beb6cb28374d2284237f627967981e646772a4d8aa30e431c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links to external websites, many of which are hosted on compromised CMS uploads or disposable domains, suggesting a link farm for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or trojan delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://archism.ru/uplcv?utm_term=chevrolet+owners+manual+pdf+free PDF link annotation
    • https://lusagroup.mobi/images/website/user/files/gamarana.pdfIn PDF document text
    • http://najlepsietorty.sk/uploads/fck/file/74616062817.pdfIn PDF document text
    • https://burkina-businessschool.com/business_school/uploads/file/72935612583.pdfIn PDF document text
    • https://anpheatingandac.com/nbloom/fckuploads/file/420115527.pdfIn PDF document text
    • http://bazatalty.pl/wp-content/plugins/super-forms/uploads/php/files/eac507bbf3029d30cf0a61a875c60982/5897255522.pdfIn PDF document text
    • http://ominocoibaffi.it/userfiles/files/67193037263.pdfIn PDF document text
    • http://www.onlinenieuwsbriefversturen.nl/gebruikers/afbeeldingen/xekizituganulanomedigekul.pdfIn PDF document text
    • https://vdbergelectro.nl/wp-content/plugins/super-forms/uploads/php/files/1da1f61f5f5cfcbcc2d068baa72a4f8a/mikerapirupunusakibuliri.pdfIn PDF document text
    • http://www.hcibatiment.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16086b1bae490f---gareruzinobafeluke.pdfIn PDF document text
    • https://mithermomix.com.mx/wp-content/plugins/super-forms/uploads/php/files/ca2a31cc3fa2fff219a4eda06fe3452e/28392236896.pdfIn PDF document text
    • http://botosani.ro/img/uploads/file/fotavoz.pdfIn PDF document text
    • https://armandofalconi.net/userfiles/file/kebazijapumivipibutaxida.pdfIn PDF document text
    • http://www.alquilerbares.com.ar/wp-content/plugins/formcraft/file-upload/server/content/files/160701032082fb---benobadika.pdfIn PDF document text
    • https://www.die-umzugsfabrik.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2b2644e08d---nexugowuke.pdfIn PDF document text
    • https://www.andrecampbell.ca/wp-content/plugins/super-forms/uploads/php/files/4d3ab0a6b89874c051e675d6d876e00a/jatinaginilupigakiratito.pdfIn PDF document text
    • http://eia-edu.com/userfiles/file/jubolobiteris.pdfIn PDF document text
    • https://steammining.com/userfiles/file/tanixig.pdfIn PDF document text
    • https://faresaldabbous.com/uploads/file/metonogiz.pdfIn PDF document text
    • http://www.uc-kushiro.net/images/library//File/lesunuxexugiwodoz.pdfIn PDF document text
    • http://resumesfromabove.com/userfiles/file/53776453831.pdfIn PDF document text
    • https://mimpishio2.net/contents//files/kemukuvukopitibepaxixipe.pdfIn PDF document text
    • http://ahkjt.com/upfile/file/6708295367.pdfIn PDF document text
    • http://plncse.hu/php_data/file/texaxomoriwoxetomejodux.pdfIn PDF document text
    • http://ck-kutnahora.cz/gais/image/file/42904003365.pdfIn PDF document text
    • https://doitsolutions.co/wp-content/plugins/super-forms/uploads/php/files/96520965f80dd186c7488dea5eec771a/zifenu.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dec5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEC5 17712 bytes
SHA-256: 87f916b6d8efb5ab70ac469097dbb4fc9a69772dfe223cd5b78a67db644eed1e
font_01_sfnt_off00010d0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D0B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012522.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12522 10952 bytes
SHA-256: 0d88453b85556c8396d948ada896575ca1c110381b506e4238cd8bfa32143dfd

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