Malicious PDF — malware analysis report

Static analysis result for SHA-256 bbc46909d63c565f…

MALICIOUS

PDF

74.9 KB Created: 2021-09-06 07:43:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 9c562f8fda184c199fc6cf185c9092b9 SHA-1: 9e58c8f851b3066440e6c0fd0056b1a3a385a645 SHA-256: bbc46909d63c565fd77cb4d91498779400c50c82851a370e806bd12945a7e606
156 Risk Score

Malware Insights

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

The PDF contains a large number of links, many of which point to unknown PDF files hosted on compromised websites. This behavior is characteristic of a link farm used to distribute malicious content or conduct phishing attacks. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://makaifruits.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609cb2156b547---fusudome.pdf In PDF document text
    • http://growlink.biz/userfiles/file/gijejipanorolatisa.pdfIn PDF document text
    • https://paloaltospeakerseries.com/wp-content/plugins/super-forms/uploads/php/files/ee09023d6e88738d0f7166d53e971325/zijuzuf.pdfIn PDF document text
    • https://alphacleanwashing.com/wp-content/plugins/super-forms/uploads/php/files/b80a5751e538e662ac9fb96b2d95f344/mijiwufuxenorolasizizeg.pdfIn PDF document text
    • https://vickers-electronics.co.uk/wp-content/plugins/super-forms/uploads/php/files/2f86d4e7a5d3f6651297cb45c23c8819/11523139144.pdfIn PDF document text
    • http://www.next-conseil.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1610a6b282e015---4289113938.pdfIn PDF document text
    • http://lakesideterracecondo.com/clients/41361/File/64281673882.pdfIn PDF document text
    • http://artospace.com/pics/file/kidirapeku.pdfIn PDF document text
    • http://christopherspubandgrille.com/userfiles/files/28003153021.pdfIn PDF document text
    • https://mudateconmigo.cl/wp-content/plugins/super-forms/uploads/php/files/ae45bcac24ec00221144a4f66b06ee04/97496075711.pdfIn PDF document text
    • http://smartcookieacademy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160946bf1c049c---gagizulikemagal.pdfIn PDF document text
    • http://xlpe.net/Images_upload/files/jifubovagetewezapun.pdfIn PDF document text
    • https://drticket.ir/basefile/drtiketcom/files/84509888585.pdfIn PDF document text
    • https://thewentworthco.com/wp-content/plugins/super-forms/uploads/php/files/0fnqh003r4otlc03nf4a5k25n3/xugumasisaxusavomusi.pdfIn PDF document text
    • https://dakhoathienhoa.net/images/files/57121497158.pdfIn PDF document text
    • http://brandiassociati.it/userfiles/file/63719427259.pdfIn PDF document text
    • https://aplusadvance.com/naver_editor/data/file/fozuxiwunoxigotudetoleg.pdfIn PDF document text
    • https://stpetejazz.com/wp-content/plugins/super-forms/uploads/php/files/un7a4f4fr3dedsu9ati61p6pr1/57699955117.pdfIn PDF document text
    • https://matrainagycsalados.hu/userfiles/file/82219061755.pdfIn PDF document text
    • http://www.mywil.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160876ff640f80---3338047447.pdfIn PDF document text
    • http://www.recetasyconsejos.com/wp-content/plugins/formcraft/file-upload/server/content/files/160945f5cbada3---56068976459.pdfIn PDF document text
    • https://fallsplat.se/file/68059244951.pdfIn PDF document text
    • https://bawaniint.com/ckfinder/userfiles/files/tuxezujeborelofigi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=capitec+bursary+application+form+2020+pdfPDF 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_off0000bf77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF77 11408 bytes
SHA-256: 5316155cd764c4d0ed3a75345fee566dc26f6da8bf751d7d9a900ddab6ff07c9
font_01_sfnt_off0000da36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA36 16924 bytes
SHA-256: 7aa04a3f600d938950941bd41a9f71e74fc9190861d663d1e25f16f1483b6715
font_02_sfnt_off000105ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105EC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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