Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b7465a44409c514…

MALICIOUS

PDF

100.9 KB Created: 2021-06-25 21:08:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 9b27869ed53798fdb38df4e45022c18e SHA-1: 9b1f4fc7dfe3a346b2e2ac292a183ffc9aa8c8c9 SHA-256: 7b7465a44409c514323981076d6c10a4ddd3d1d798821f6f1ec57195438d3226
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on compromised WordPress installations, suggesting a link farm designed to redirect users to malicious content. The 'SE_INVOICE_LURE' heuristic indicates the document's content is likely a deceptive lure, such as a fake invoice, to encourage clicks. ClamAV detection as 'Pdf.Phishing.Trojan' further supports the malicious nature of this file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9803

Heuristics 7

  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://e-lightingcontrols.com/wp-content/plugins/super-forms/uploads/php/files/44e6df8663a543927ca9671cbf399769/84466454335.pdf
    • https://hps-gruppe.com/wp-content/plugins/super-forms/uploads/php/files/tr47a0ls1safne1tclb9see5cb/tazugaserudozexir.pdf
    • http://www.asejnrtigers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160d5ca2116f21---xinunegujukunaloli.pdf
    • https://amirep.com/wp-content/plugins/super-forms/uploads/php/files/e678645df0ba160942d52d6b3d7d2a50/98263749858.pdf
    • http://lyonsmcafeereunion.com/clients/a/ab/ab8eb7fa8d7cf94b91f67e7e346c80ed/File/darefosolekov.pdf
    • http://ahxxzx.com/userfiles/202105/file/gimewi.pdf
    • https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/3ca493c95e5033434249f92202c65b36/molizilawavilenaj.pdf
    • https://www.audifonosdoshoydos.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608415e33e03d---81314769273.pdf
    • http://kovacsoltvaskerites.hu/images/file/gepomelapapovifimetonogip.pdf
    • http://xn--e1aaafipco3bk8gra3b.xn--p1ai/upload_picture/file/kobug.pdf
    • https://mavismanagement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cade4dad334---xetitazel.pdf
    • http://thefutureofgolf.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1606d4f32e6267---pifex.pdf
    • https://www.beewellrx.com/wp-content/plugins/super-forms/uploads/php/files/tmp/maliromabolidowi.pdf
    • http://logo4you.dk/userfiles/file/21622267766.pdf
    • https://celovechurch.org/wp-content/plugins/super-forms/uploads/php/files/050d94d5d4cf46c40cdf2e3546881ee0/gexubega.pdf
    • http://www.orarestauratorisaf.it/wp-content/plugins/formcraft/file-upload/server/content/files/16073f43606867---zolazepuvedegusobokun.pdf
    • https://www.tai.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1607c1f8f7d628---5000152604.pdf
    • http://actionelectric.pt/www/wp-content/plugins/formcraft/file-upload/server/content/files/16085102ed4d30---xudoda.pdf
    • https://www.mercedesbenzofaustinservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e5e1a0ac57---gilamixone.pdf
    • http://tafgambiatours.com/userfiles/file/65314153531.pdf
    • https://wholisticvibrations.com/wp-content/plugins/super-forms/uploads/php/files/047d5341d9f0d2ec8ad9691b78fc36d0/momim.pdf
    • http://averon.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16075f671ad8f0---78952910642.pdf
    • https://www.blackandwhite-salon.com/wp-content/plugins/super-forms/uploads/php/files/f5fa10f79de97e5fe3fd136749180a5e/rirofelilik.pdf
    • https://ateneoarbonaida.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a1a88d78cf---tojadezuvofimofafujasotav.pdf
    • http://www.nandomoraes.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16088f3bc430d3---66265016970.pdf
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7e412b540b---dovixiven.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=conditional+probability+independent
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012524.bin
e5f28760c90cebb17d5e4ae32d062d0c3b160db220a0b99f87c0a1e54e2e22fe		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12524 18860 bytes
font_01_sfnt_off0001576c.bin
f0185d0e8ea42815d5cdf5cdbf2ff8af901190ae7c1aff66395fd5a0f4ada46c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1576C 10500 bytes
font_02_sfnt_off00016f30.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16F30 16792 bytes

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