Malicious PDF — malware analysis report

Static analysis result for SHA-256 080ae10599f4f18d…

MALICIOUS

PDF

87.0 KB Created: 2021-08-08 09:20:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 8bad4e8eb99950dde6198f6ebba2a741 SHA-1: 7fdb9d7650021f625da961978e5f5515bdfcbe2c SHA-256: 080ae10599f4f18d20c5e016caa2b217c1b213f592d98e6d5266ccc5cc1b25c7
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating it's likely a phishing or malware distribution lure. The document functions as a link farm, with numerous URLs pointing to compromised WordPress sites, suggesting an attempt to redirect users to malicious content. The presence of multiple PDF link farm heuristics further supports this attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://archism.ru/uplcv?utm_term=what+is+the+range+of+a+tesla+model+x
    • http://clearlakesd.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a60f49b0afd---vilopufudofipabisuronavum.pdf
    • http://botosani.ro/img/uploads/file/lelazemet.pdf
    • http://grandinhr.eu/images/user/file/ronuzi.pdf
    • http://www.majoriscambio.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b1441e8a744---pexofajusovumomelelonine.pdf
    • https://kohphanganhotelandtour.com/userfiles/file/76460959888.pdf
    • https://www.advids.io/wp-content/plugins/formcraft/file-upload/server/content/files/160882098888a6---42991102903.pdf
    • http://nnk.gr/wp-content/plugins/formcraft/file-upload/server/content/files/16072496717d13---89289620864.pdf
    • https://ballestermultiservicios.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078d53361d91---bukixawukilus.pdf
    • https://europartner2.pl/uploads/jakakuxopofolalowivud.pdf
    • https://organicfertilizerproduction.com/d/files/54691730126.pdf
    • http://cageart.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607b1bf296cac---dafupatuvowej.pdf
    • https://efnnma.org/files/file/togijivurolivekifotovade.pdf
    • http://circolonauticofavignana.it/userfiles/files/rejufulotizedoviwowano.pdf
    • http://legalinet.eu/userfiles/files/telawezokoxopup.pdf
    • https://elitestrategyglobal.com/wp-content/plugins/super-forms/uploads/php/files/8885b332ee7c02793d293420b668b650/kotirosuv.pdf
    • https://miamiuniquelimo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae7dd467bc9---vopuwemafajotubusupakaw.pdf
    • http://www.webtony.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a6a21fa55da---99827401507.pdf
    • http://stylist.in.ua/wp-content/plugins/formcraft/file-upload/server/content/files/16081766284dc0---90302006961.pdf
    • https://cedria.es/DOCUMENTS/FotosFCKEditor/file/xovodemekuwuvolemisoliw.pdf
    • http://visualpaint.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608857b63483a---43423128592.pdf
    • http://apsara.ru/userfiles/file/zemod.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_off0000eee1.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xEEE1 16792 bytes
font_01_sfnt_off000106f3.bin
d63fc89a0cdecf331027946fc83e45229d9265fac5f2bfda8c5c83ee7a246986
pdf-font-stream PDF embedded font (sfnt) at offset 0x106F3 17440 bytes
font_02_sfnt_off00013492.bin
6d31260783257322b1521e3b73cd7b19ed0d5e5bc3ce82c874412090b2f905a2
pdf-font-stream PDF embedded font (sfnt) at offset 0x13492 10896 bytes