Malicious PDF — malware analysis report

Static analysis result for SHA-256 2bac216d62eb30fb…

MALICIOUS

PDF

86.2 KB Created: 2021-07-04 02:32:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 716941344eb10484f976f246f8ecc105 SHA-1: 321b040c3d9923545682edaf0479966f9e237470 SHA-256: 2bac216d62eb30fbc427c496e4ba172187027412b0a635ebcf3fc0880e6e113c
156 Risk Score

Malware Insights

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

The file is a PDF identified by ClamAV as 'Pdf.Phishing.Trojan'. Static analysis reveals it functions as a link farm, with numerous embedded URLs pointing to compromised WordPress sites and disposable domains. These links likely serve as lures for phishing attacks or to distribute further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

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://nensi.si/upload/file/dodamegusorariwulatogare.pdf In PDF document text
    • https://takeorders.online/wp-content/plugins/super-forms/uploads/php/files/9atncrvq6jkd5qiqtstq8q7h33/99745867237.pdfIn PDF document text
    • http://mko-yug.ru/wp-content/plugins/super-forms/uploads/php/files/6e3b111d3edf550d2e57a746ee635b0f/keralasori.pdfIn PDF document text
    • https://www.temsilcifirsatlari.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082f81db76ba---jukilatitalukaw.pdfIn PDF document text
    • https://belgradenightlife.info/wp-content/plugins/super-forms/uploads/php/files/5acdek5gbdu256ujel754qvst9/sasosuzumuzone.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160719ada786bc---jerixixikirokuvogake.pdfIn PDF document text
    • http://www.aadhar-interior.com/userfiles/file/31536667800.pdfIn PDF document text
    • http://luberoff.com/userfiles/file/94960323379.pdfIn PDF document text
    • https://primeodontorj.com/wp-content/plugins/super-forms/uploads/php/files/b8d39844054690cb7f5698f6c5e7f9b9/77374021830.pdfIn PDF document text
    • http://projectbudapest.hu/wp-content/plugins/formcraft/file-upload/server/content/files/1607de514d0062---77655961173.pdfIn PDF document text
    • https://chicagoportablexray.com/wp-content/plugins/formcraft/file-upload/server/content/files/160db4597546c3---51121673237.pdfIn PDF document text
    • http://df-2.de/images/daten/file/dobopajerep.pdfIn PDF document text
    • http://vtracauto.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608015c98e8b5---dumewilidiwowifokuwike.pdfIn PDF document text
    • http://eprdel.cz/userfiles/file/56264433687.pdfIn PDF document text
    • https://balance-global.com/wp-content/plugins/super-forms/uploads/php/files/v4n1rtbivd34t2qbkdbjq6mar2/32933065020.pdfIn PDF document text
    • http://shelton1961.com/clients/35589/File/ledawir.pdfIn PDF document text
    • https://www.glasswindowequipment.com/wp-content/plugins/super-forms/uploads/php/files/f0be5a040510dabed8e3a8f5d56b8683/29369115500.pdfIn PDF document text
    • https://www.allterra.group/wp-content/plugins/super-forms/uploads/php/files/3d95eddb52bdd96c23a4f7a52f625dc7/77312981320.pdfIn PDF document text
    • http://paymentsbusiness.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160c26a144ade1---fogavamulonimuzuvotuw.pdfIn PDF document text
    • http://czechdidgeridoo.com/admin/upload/file/dodawedixivuzi.pdfIn PDF document text
    • https://mercedesmazo.es/wp-content/plugins/formcraft/file-upload/server/content/files/160ba1c8aeea69---munudijozilisepoxuk.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=jewlcrafting+guide+wowPDF 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_off0000efc7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFC7 10660 bytes
SHA-256: 13cddbb2916c6accd20eb0c610e39a6da64de34940f44a99633f74880bbc23c8
font_01_sfnt_off00010830.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10830 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012042.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12042 16856 bytes
SHA-256: 11f9ae8d834c9193e29764d674e17b4a6cf597a77eb95cdcd3f2cacc3f16df8f

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