Malicious PDF — malware analysis report

Static analysis result for SHA-256 50c7a0cc96472456…

MALICIOUS

PDF

81.6 KB Created: 2021-06-28 09:51:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 59a1f50801d46ada4f41ab642dd755e4 SHA-1: 32fdf2912bbe5a3452fbd54a7ab3180edd64e9e3 SHA-256: 50c7a0cc96472456b67fe14b05de21d6e80fbb00d7a372f731b3cc2eb9442255
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many hosted on compromised WordPress installations, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malicious document lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

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://kystop.com/wp-content/plugins/super-forms/uploads/php/files/8tknlnjekj7vv2bkrofinu72k4/28801679003.pdf
    • https://menuiserie-sainte-anne.fr/userfiles/file/fujazuje.pdf
    • https://web-sila.ru/wp-content/plugins/super-forms/uploads/php/files/8f05b41398debcfc09b47419c70f06dd/16247954908.pdf
    • http://hattrick-sports.com/wp-content/plugins/formcraft/file-upload/server/content/files/160798786c1491---87909206390.pdf
    • http://unipell.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160bf15ceb978c---sowatesalerokiwaxifiv.pdf
    • http://yorktownhs1987.com/clients/57482/File/20142843271.pdf
    • http://bagpack.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/160a9426bc6578---lulinegotidepabudoj.pdf
    • http://provia-events.de/pics/fotos/1/file/jifonerejiboreferisu.pdf
    • http://joshuadacosta.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8d1af91994---lupinobiseruli.pdf
    • http://oneself.pro/wp-content/plugins/formcraft/file-upload/server/content/files/16098a19ae5eeb---70257888155.pdf
    • http://www.wallisandemmanuel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ed5d911de6---dekuwezavawi.pdf
    • http://www.combatsim.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16086628b461d8---gevasola.pdf
    • https://ctapigroup3.com/contents//files/badun.pdf
    • https://www.energetisch-therapeut-estie.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607f84c08c892---kufijevotelufarox.pdf
    • http://aplus.to/userfiles/file/zixixarajek.pdf
    • http://raiders71.com/clients/4/41/4134020f2f298c111575624a380fabfc/File/vuzor.pdf
    • http://fantasypartyentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f6473d236e---83702459724.pdf
    • http://virtualcharityevents.com/vce_cake/files/files/deviremesadokiwuz.pdf
    • http://fobosgrunt.ru/files/ckfinder/files/gubupenuvoturumak.pdf
    • https://connect.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/11d5f0c40825aa9cbb83f2e3a2d7270c/47670153714.pdf
    • http://www.sandzthabapanel.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1607b537112812---96282173792.pdf
    • http://andrelandberg.com/userfiles/file/26999310051.pdf
    • http://bmhs1963.com/clients/7/72/7286fd37811b7a5dece6e69924e4d5ab/File/jakarowuw.pdf
    • http://uniondeautoescuelas.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078e18a03efd---84456042233.pdf
    • https://markeishahall.com/wp-content/plugins/super-forms/uploads/php/files/fae4ebd76ebc2e6ac7ef555ec00a0a0c/jowesafodagin.pdf
    • http://komputerzagrosze.pl/userfiles/file/42769392496.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=mathematics+for+class+8+rs+aggarwal+solutions
    • 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_off0000dad5.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDAD5 16792 bytes
font_01_sfnt_off0000f2ec.bin
d0ab0d5f94a9ec35c77941670341824dc481d248514f822ffd6185aa91c15233		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF2EC 11172 bytes
font_02_sfnt_off00010cf0.bin
87dabe3a4e9a542716230dec24dec169c9d6a73a826122d37b9dfa9595a1c9c3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10CF0 16324 bytes

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