Malicious PDF — malware analysis report

Static analysis result for SHA-256 9012e0154866baf9…

MALICIOUS

PDF

85.5 KB Created: 2021-07-04 14:28:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 3b4978df7653c8abb4b83a88b39a5c53 SHA-1: 9d6d88bf5d6f6271ca37f5073ede3aa05c0e61b6 SHA-256: 9012e0154866baf92f16db7185dc809d284797fcec12ac876541e0b0ae60cbc4
156 Risk Score

Malware Insights

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

The PDF document contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable hosting. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or distributing further malware. The embedded URLs suggest a link farm designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://inwebjor.ru/uplcv?utm_term=kinetic+family+drawing+sample+report
    • https://riolospettacoli.it/filesUploads/file/33821822361.pdf
    • https://nationalcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608095f20c5a9---28245798539.pdf
    • https://www.andeanskyline.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e88cf2a674---67155286206.pdf
    • http://a-range.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1609c40579ffb5---mugutafi.pdf
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/1mpg6dn43qqrbasig616gmglg3/tegimimofos.pdf
    • https://www.reachcast.ca/wp-content/plugins/super-forms/uploads/php/files/7e4ecde2729d1cf451da5a91896d9158/pozumegijiwewubawin.pdf
    • https://www.sacda.org/wp-content/plugins/super-forms/uploads/php/files/qu86eavf9tel5mn0kq682hesn2/60918099824.pdf
    • https://infrastone.com/userfiles/files/88493818611.pdf
    • http://bagpack.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/1606c96d02f487---rikizutabufemon.pdf
    • http://pmdrecycling.com/wp-content/plugins/formcraft/file-upload/server/content/files/160abe6dfc828c---xanotegaxezonoguf.pdf
    • http://whs1979.net/clients/65916/File/bowama.pdf
    • https://bahia-group.com/ckfinder/userfiles/files/48063878952.pdf
    • https://www.sehersirin.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c0a13b0317---venasanatibozewed.pdf
    • http://www.zav-mito.si/wp-content/plugins/formcraft/file-upload/server/content/files/160b879bb4f050---xituboji.pdf
    • http://www.whirlpool-beachcomber.at/wp-content/plugins/formcraft/file-upload/server/content/files/1607aa9baab344---gatimotupasaweseb.pdf
    • http://cosmeticdermatologymiamibeach.com/uploads/data/files/furoguwuparazubupu.pdf
    • http://extreamtuning.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607de33e25f98---xoxixetiluxanodosetus.pdf
    • https://xn-----6kcabagcgfjsxjciriy6alkh6a7aqk.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/a50e20be93ca3f96a8f9f387e2cc2b04/75616574475.pdf
    • https://engineeredrepinc.com/wp-content/plugins/super-forms/uploads/php/files/d52c800219d4b22ac79848b2ee56486e/79499697776.pdf
    • http://asirius.su/wp-content/plugins/super-forms/uploads/php/files/0df4502bbca0d64b1da149b63416099c/42446338185.pdf
    • http://aeskulap24h.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae5c4413221---85775501149.pdf
    • https://loan-financial.com/wp-content/plugins/super-forms/uploads/php/files/a0d15499d45f6639f98dcabafde54b51/finusosilafifukurobavig.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_off0000e7d7.bin
505796c1a911effd6e2fae9a366a0384f64117d1f5193c80a30488fa7884e5fa		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE7D7 17932 bytes
font_01_sfnt_off000116d3.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x116D3 16792 bytes
font_02_sfnt_off00012eea.bin
7a502411059e1463b7ae1dfa717da8cd6c8564d394738f986e9dc7349fae00b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12EEA 11156 bytes

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