Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f6d6756de7bd83a…

MALICIOUS

PDF

94.3 KB Created: 2021-07-17 06:06:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 7264fce467dc4ff27cb50aa381f6fd3b SHA-1: 7c908498020e1dd9102eb6a202088c351d4c45dc SHA-256: 9f6d6756de7bd83ab34111c55ce5a85d83987f912ea27ef066469abb337330fd
154 Risk Score

Malware Insights

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

The PDF file contains numerous links pointing to websites hosted on compromised CMS platforms and disposable domains, as indicated by the 'PDF_SEO_DISPOSABLE_LINK_FARM' and 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' heuristics. The ML classifier and ClamAV detection further support its malicious nature. The primary purpose appears to be directing users to potentially malicious or phishing content through this link farm.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5059

Heuristics 5

  • 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
  • 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://gwhs79.com/clients/867100/File/54503836086.pdf In PDF document text
    • https://alshaabcoop.com/userfiles/file/21373144842.pdfIn PDF document text
    • http://frederickfollows.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160790ed0c44d2---lipiwisumawoxesidepuk.pdfIn PDF document text
    • http://remontnoedelo.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160e4e0b20be82---90454993894.pdfIn PDF document text
    • http://ohmamakitchen.com/uploads/files/80010309656.pdfIn PDF document text
    • http://dyglas.com/userData/board/file/63145277999.pdfIn PDF document text
    • http://ehomerealestate.org/images/file/34218151117.pdfIn PDF document text
    • http://naturallabs.fr/userfiles/file/taxupalexofodiwefukazi.pdfIn PDF document text
    • http://www.expo-hotel.com/english/wp-content/plugins/formcraft/file-upload/server/content/files/160852cecace8d---vujifinaxede.pdfIn PDF document text
    • http://kppzp.pl/userfiles/file/66286448347.pdfIn PDF document text
    • http://www.acefence.com/wp-content/plugins/formcraft/file-upload/server/content/files/160780d08af28e---96563942647.pdfIn PDF document text
    • https://aimara-bg.com/userfiles/file/wewibezut.pdfIn PDF document text
    • https://lokmangal.co.in/wp-content/plugins/super-forms/uploads/php/files/3df8dd5912be848c19190be412820182/joxowixu.pdfIn PDF document text
    • http://forresterfamilyreunion.com/clients/c/cc/cc72bfd2512333311cc1ef5a4fdef90f/File/72080434812.pdfIn PDF document text
    • http://salonlomi.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160a68357f0a93---duvafubedar.pdfIn PDF document text
    • http://for-rent-aalst.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a445881e528---manotutumubuwokemoka.pdfIn PDF document text
    • http://cioccolatogallucci.it/userfiles/file/40597400269.pdfIn PDF document text
    • http://studioassociatoemc.com/userfiles/files/69807568739.pdfIn PDF document text
    • https://tractorpulling-emmeloord.nl/upload/file/levofupiruxasakamuralato.pdfIn PDF document text
    • https://prsnashville.com/wp-content/plugins/super-forms/uploads/php/files/e51366577d64079ed503dac702eef115/80158644077.pdfIn PDF document text
    • https://greenfuturevietnam.com/Upload/files/89001663685.pdfIn PDF document text
    • http://saludocupacionalpso.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/1607be5a495302---54927220538.pdfIn PDF document text
    • http://dlevitin.ru/fck_editor_files/files/45429561659.pdfIn PDF document text
    • http://lactopad.com/uploads/files/5974452200.pdfIn PDF document text
    • https://rockoncharters.net/home/rock/public_html/ckfinder/userfiles/files/xoxeselawobafojonuburo.pdfIn PDF document text
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/be15bdefb2cb91d588196dd6dc2cf018/womutejoludasewokupike.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=afro+b+hairstylesPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010fa2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FA2 10440 bytes
SHA-256: ab61fbe1f1ac7144d597f6f82a79b471fe105a6f7a8f6a753312268c8d071d90
font_01_sfnt_off0001277c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1277C 1796 bytes
SHA-256: 755b843c3a20f66ea68988c6c55ef5c5be5f59bb004e03bff28a6134c7f942e8
font_02_sfnt_off00012feb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FEB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off000147fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x147FD 19060 bytes
SHA-256: 622d78be273bb8adb6cc39c3a93430b94705e615e3e128fbb906f5bf6069318b

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