Malicious PDF — malware analysis report

Static analysis result for SHA-256 d62ca0a63cb8f44b…

MALICIOUS

PDF

84.4 KB Created: 2021-09-19 08:07:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 82921fc1ffda127527933a3d3245b458 SHA-1: 5a8e8a28aa4be4ce3a4e10cdfbd3bf110c581472 SHA-256: d62ca0a63cb8f44bbba7da9f0a98d464b76f80c8daec5dea0f3de543ab791459
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics indicate the PDF acts as a link farm, redirecting users to various compromised or disposable hosting sites, likely for phishing or scam purposes. The presence of external URIs and link farms suggests an attempt to lure users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://coretry.ru/uplcv?utm_term=free+map+hack+in+mobile+legends PDF link annotation
    • https://hobbypet.cz/files/file/47877114339.pdfIn PDF document text
    • https://adium.ru/userfiles/file/67114370035.pdfIn PDF document text
    • http://tornyanggrace.com/upload/file/57472099563.pdfIn PDF document text
    • http://jagatjyotischool.org/jagatjyotischool/userfiles/file/batawerebowivuwudu.pdfIn PDF document text
    • https://sportyou.fr/ckfinder/userfiles/files/jimakafi.pdfIn PDF document text
    • http://aallergy.friend-match.com/upload/files/dafelavazuwevuz.pdfIn PDF document text
    • https://intelean.com/wp-content/plugins/formcraft/file-upload/server/content/files/16143014c2ab75---vopikupiwabegutet.pdfIn PDF document text
    • https://kaimano.it/file/tejademijerobu.pdfIn PDF document text
    • http://icltindia.in/userfiles/file/bixese.pdfIn PDF document text
    • https://zooiguana.pl/app/webroot/media/files/lezutidusuravinamonan.pdfIn PDF document text
    • https://www.ibyservice.com/wp-content/plugins/super-forms/uploads/php/files/e3bc4f226ed41c00a11902e61dd86a37/lazugomoradigoxowogox.pdfIn PDF document text
    • http://artmetinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/16143cca65cfa0---fanikinebukutarosajiwir.pdfIn PDF document text
    • http://raegcafe.com/uploads/files/bukonodobapil.pdfIn PDF document text
    • http://av72-reklama.ru/userfiles/file/16319861398717f9c10ea8d1d3b0.pdfIn PDF document text
    • http://silverk.ru/img/lib/file/xofunoxowexetiwulaxikem.pdfIn PDF document text
    • http://lotusburbank.com/uploads/files/24469380724.pdfIn PDF document text
    • http://cpghollywood.com/userfiles/files/45695087034.pdfIn PDF document text
    • http://festivaldeliteraturadepereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a2b3ecf184---3531554474.pdfIn PDF document text
    • http://www.telsercom.com/wp-content/plugins/formcraft/file-upload/server/content/files/161301072dcccb---88079060170.pdfIn PDF document text
    • http://chanhungcorp.com/images/uploads/files/6927453945.pdfIn PDF document text
    • http://agataklimowska.pl/userfiles/file/90431538515.pdfIn PDF document text
    • https://www.pal-kont.hu/wp-content/plugins/super-forms/uploads/php/files/7f007cc9800c7a4d2af0bea00d82f2d4/84629943439.pdfIn PDF document text
    • https://escaletravel.com/userfiles/files/vudosizogivumazotoje.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e1e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1E4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f9fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9FB 11072 bytes
SHA-256: dabc0085a01bb13c301cf3073e64b2879260d49a597859f8b85aa387bd9cde42
font_02_sfnt_off00011310.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11310 18628 bytes
SHA-256: 0affde323c87361fdf52882043b29cc88a730069841caf95f11455061c6a861a

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