Malicious PDF — malware analysis report

Static analysis result for SHA-256 0cd92c483d03b002…

MALICIOUS

PDF

75.8 KB Created: 2021-07-03 12:15:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 7606207e8d588a6238982b3d8ce4a853 SHA-1: d133ab1325754918350a3c5de26323cfa813e1b2 SHA-256: 0cd92c483d03b00232b75c97cc5506f0c17275d91ffcf5f1eaa2193920a362e2
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which point to websites hosted on compromised CMS platforms or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The primary function appears to be directing users to potentially malicious external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://accesoriosalmayor.com/images/userfiles/file/morek.pdf
    • https://ohligschlaeger-berger.de/wp-content/plugins/formcraft/file-upload/server/content/files/160d43f96a95b1---vufijajofomofuzeta.pdf
    • https://eletvital.hu/uploads/files/mamon.pdf
    • https://manajrgvaaradhi.com/cms-uploads/files/51308596884.pdf
    • http://jar-ted.pl/file/62394913835.pdf
    • http://smolensk-bakaleya.ru/userfiles/file/69480296840.pdf
    • http://localhomesales.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16087401d24de2---pebiwenojimov.pdf
    • https://birudongker.com/contents//files/64049541930.pdf
    • https://www.tangelo.no/wp-content/plugins/formcraft/file-upload/server/content/files/1607d7c4acdbe1---50665747090.pdf
    • https://moma-restaurant.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c6d7ff43160---70137312842.pdf
    • http://botanicgardenscafe.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607280fc56d2f---10547257522.pdf
    • https://catequesisnavarra.org/guiarte_userfiles/files/78196002593.pdf
    • http://myphamhelios.vn/luutru/files/bisufeginaguxipif.pdf
    • http://brighterhealthcare.co.uk/wp-content/plugins/super-forms/uploads/php/files/n8883r68pge3ik70aonu1bhnma/vobizuwuruganafofo.pdf
    • http://zentrumok.com/userfile/files/bedugurimaz.pdf
    • http://www.uppld.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609a1df416c37---73696212561.pdf
    • http://asesorialuishervas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a381e123c5---97626907754.pdf
    • http://rana-international.com/userfiles/files/63699436196.pdf
    • http://bjsprt.com/uploadfile/file///2021062115585247.pdf
    • http://terapeutickemasaze.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16077cc411e6d8---15114061161.pdf
    • https://micro-churches.net/uploads/file/2571730000.pdf
    • https://independentmusicleague.com/wp-content/plugins/super-forms/uploads/php/files/75add3514ebb0db14ae09971e2965afb/rojadevigelibara.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=want+to+clarify
    • http://e1pl2.nazwa.pl/busy/fotki/file/tuxifovagodutopuvi.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_off0000c868.bin
392cc2353ae56da676184b8a30bb48acb10b3bfe42b793dc64267cd1817474be
pdf-font-stream PDF embedded font (sfnt) at offset 0xC868 16992 bytes
font_01_sfnt_off0000f397.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF397 16792 bytes
font_02_sfnt_off00010bae.bin
cfdf4f091ad4344bdd3067efb76b9cff8790d876fb3a52e245409748ea7344eb
pdf-font-stream PDF embedded font (sfnt) at offset 0x10BAE 10136 bytes