Malicious PDF — malware analysis report

Static analysis result for SHA-256 009d8647a7517011…

MALICIOUS

PDF

74.7 KB Created: 2021-09-09 21:09:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 436c31bc4609436059e5d2314e7a9227 SHA-1: 4e110c6f19a2ace70ea9cf8a760cb6525bb478f2 SHA-256: 009d8647a7517011b964aeb6ee3e4d6cb14f0ed4bd8df8ddd3bd718643e3ca13
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 critical ClamAV detection for 'Pdf.Phishing.Trojan'. The file contains numerous links, many pointing to compromised CMS upload storage or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The ML classifier also strongly indicated maliciousness.

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://iamluno.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133fd067208a---komubilakodit.pdf In PDF document text
    • https://interstudy.net/userfiles/file/81127761606.pdfIn PDF document text
    • https://koparieshorvathbusz.hu/files/file/64748853157.pdfIn PDF document text
    • http://ekonopuntos.com/campannas/file/43463298723.pdfIn PDF document text
    • https://www.temsilcisitesi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137e855e4bbe---26408354029.pdfIn PDF document text
    • http://suvagcentr.ru/userfiles/files/85792988743.pdfIn PDF document text
    • http://fuku-zou.com/userfiles/file/30001539553.pdfIn PDF document text
    • https://perkunasstudio.com/uploads/files/202109070720364165.pdfIn PDF document text
    • http://dalnoboy.org/data/filestorage/upload/files/kixusariledosupamulekejab.pdfIn PDF document text
    • http://www.belladermeestetica.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/161371fadc42c3---jumidaxesijarirogerizejim.pdfIn PDF document text
    • https://beaszemin.com/files/15843486462.pdfIn PDF document text
    • http://smm-mm.com/uploads/news_file/55246052911.pdfIn PDF document text
    • https://fundreamz.com/ckfinder/userfiles/files/vaborapinowiwi.pdfIn PDF document text
    • http://caerulumpharma.com/upload/files/naregitu.pdfIn PDF document text
    • http://www.elstar.ru/uploads/files/469741189.pdfIn PDF document text
    • https://tidaksusah.com/contents/files/pewodupufojetejatilo.pdfIn PDF document text
    • https://sk-developers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f418e041fd---97409421607.pdfIn PDF document text
    • http://mingzhicc.com/userfiles/files/vimokinamigupomevuxupat.pdfIn PDF document text
    • https://privatecambodiatour.com/userfiles/file/kejipelafemupemep.pdfIn PDF document text
    • http://transporteslaplata.com/imagenes_web/file/wibifuka.pdfIn PDF document text
    • https://arendic.cl/files/luwawoxipabufagin.pdfIn PDF document text
    • https://atolab.it/wp-content/plugins/super-forms/uploads/php/files/4f7a9d4688234c1e16697b8d0fadeb69/mamalupopulivepupavavafej.pdfIn PDF document text
    • http://alptw.com/images/files/88773464996.pdfIn PDF document text
    • https://psystat.net/candyticket/uploads/page_images/files/14532314550.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=world+tv+app+apkPDF 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_off0000c491.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC491 16588 bytes
SHA-256: ea79db80702bd884227b90466650d88f8dc275a5f05d1a5bbd23e5d16384104c
font_01_sfnt_off0000ef51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF51 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010768.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10768 10040 bytes
SHA-256: 0aefc742eb6c577d29d2fe5120bef7c02c6856d908115dbab217384f03037393