Malicious PDF — malware analysis report

Static analysis result for SHA-256 c678d112ffc67b7f…

MALICIOUS

PDF

91.1 KB Created: 2021-06-28 15:08:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 463a6671560f2c04ce85f79a6bb55320 SHA-1: ece76762d1b9ec674af4e9a5e7ef635d30623bc5 SHA-256: c678d112ffc67b7fec3f4becf1a8d04e8c29d9f729e77c6c60a1d2a8565227c8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links pointing to external websites, many of which appear to be hosted on compromised CMS platforms or disposable domains, indicating a phishing or malware distribution attempt. ClamAV detected this file as Pdf.Phishing.Trojan, and ML classifiers also flagged it as malicious. The presence of a link farm suggests an effort to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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 https://garglob.ru/uplcv?utm_term=five+good+manners+for+class+2
    • https://www.advids.io/wp-content/plugins/formcraft/file-upload/server/content/files/160881e49f3e23---ganamepovesamemogodi.pdf
    • https://xaydungdonggia.com/app/webroot/files/images/pages/files/82548943236.pdf
    • http://af.ssla.ru/images/fornews/files/13074474203.pdf
    • https://www.grecosalesinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a9aad21e7c---97190782893.pdf
    • https://forex-robo.org/wp-content/plugins/super-forms/uploads/php/files/453ecf9b74de8208254af0ffc95d6719/56404391795.pdf
    • https://avantkart.com/wp-content/plugins/super-forms/uploads/php/files/s17rmalijnogp82ia3h50ns4uo/59777492305.pdf
    • https://fermuar.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082f360ba194---29759529330.pdf
    • http://optimus.org.au/wp-content/plugins/formcraft/file-upload/server/content/files/160780e3b4c403---94054163115.pdf
    • http://albatrossmrn.com/konadnew/userfiles/file/18691350994.pdf
    • https://wholisticvibrations.com/wp-content/plugins/super-forms/uploads/php/files/7703438ccb8f4a811dbff6bc1a94ea16/90191749577.pdf
    • https://burgas-remonti.com/userfiles/file/59836762357.pdf
    • https://yastudio.net/wp-content/plugins/super-forms/uploads/php/files/b450e6edaca77327381bb5093f475fee/lotubesosigigiru.pdf
    • http://dirabrealtors.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075a451aadb6---kuliwusotudek.pdf
    • https://qamarapps.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c4f9621fac8---fitodajomasorogudaxegori.pdf
    • https://abeess.com/userfiles/file/kadupobalokutu.pdf
    • https://sumangold.net.vn/wp-content/plugins/super-forms/uploads/php/files/jbe6kd8te6r3t7003fjmnqsd48/giwaboroseloxati.pdf
    • http://www.haztartasigepszakuzlet.hu/pics/file/zuluxujiguvusafu.pdf
    • http://www.insurancedirectcanada.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16099ec0a7960c---zanuwanaroribisujuvi.pdf
    • https://orkhaconstruction.com/wp-content/plugins/super-forms/uploads/php/files/c0otee3pmv8tasj1jjnlh2fhfr/wimupejododisalupexuvit.pdf
    • http://www.dean-cpa.com/files/adminpic/file/12296508498.pdf
    • http://manufim.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160a33a4080ab1---60969324632.pdf
    • https://www.rockandroll.blog.br/wp-content/plugins/super-forms/uploads/php/files/gfeda4nsd19pqgpe0g70t9s1a2/4811677966.pdf
    • http://clearlakesd.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608b21c59f1de---laxilej.pdf
    • http://7166867.ru/ckfinder/userfiles/files/83482596277.pdf
    • http://shipagents.nl/uploadfiles/file/kopofezigix.pdf
    • https://www.americanapi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad77ae69e82---52541003454.pdf
    • 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_off000100b4.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x100B4 16792 bytes
font_01_sfnt_off000118cb.bin
9ffbbbc0d699c918e183844b3e7e6e87ad7226c7190b14b5d1758c06355a18fa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x118CB 10884 bytes
font_02_sfnt_off000131c6.bin
9b2aeaf322a6c926d215141e3c1994e28524b57d9602996f19371e6e157df4f9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x131C6 16916 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.