Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5f80d8e44bbdb7c…

MALICIOUS

PDF

74.9 KB Created: 2021-09-04 13:46:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 93fd6124605f24fdef97edd8c607a252 SHA-1: fee65ea394c8a943411edb0d53f555f1fa9f9ce0 SHA-256: f5f80d8e44bbdb7c09b30c9e21a2c1774c9191b12b158d4dfa09ebd6e7ab39ab
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The file contains numerous embedded URLs pointing to various domains, many of which appear to be compromised websites or disposable hosting, suggesting a link farm or phishing lure. The ML classifier also strongly indicated maliciousness. No scripts were extracted, but the presence of multiple external links indicates an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://pistant.ru/uplcv?utm_term=qualitative+data+collection+method+pdf PDF link annotation
    • http://spharma.ua/files/file/42607547582.pdfIn PDF document text
    • http://asijskepotraviny.cz/files/file/93007223325.pdfIn PDF document text
    • http://www.elitagida.com.tr/wp-content/plugins/super-forms/uploads/php/files/79da3tnd12svtt1vn5amkqfkg0/46252800268.pdfIn PDF document text
    • http://dc-42351dc5a6b3.prshots.es/uploads/userfiles/1629802279/files/27169102647.pdfIn PDF document text
    • http://olynskiconstruction.com/pics/file/jiwelus.pdfIn PDF document text
    • http://mai-colle.jp/userfiles/file/zuguvi.pdfIn PDF document text
    • http://perfectthesale.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aec476585aa---26212462287.pdfIn PDF document text
    • http://geology.ie/wp-content/plugins/formcraft/file-upload/server/content/files/160d862765ee3e---65173377983.pdfIn PDF document text
    • http://flirdining.com/uploads/files/mafarogexer.pdfIn PDF document text
    • http://grawerlik.pl/userfiles/file/33368447051.pdfIn PDF document text
    • https://gccpay.net/wp-content/plugins/super-forms/uploads/php/files/ef45d92b1382b7796130a07529f1da32/25822085957.pdfIn PDF document text
    • http://www.dfdtrading.sk/ckfinder/userfiles/files/56256842943.pdfIn PDF document text
    • https://rajaketiga.com/contents//files/tuluwopogipivudipag.pdfIn PDF document text
    • https://sportsht.com/userfiles/file/vupanagolefegoxef.pdfIn PDF document text
    • https://marbellamohali.com/wp-content/plugins/super-forms/uploads/php/files/2edeac38d24d3ff00015805364412ef7/bugepadib.pdfIn PDF document text
    • https://nocenzura.space/web/img/podborky/files/56380135842.pdfIn PDF document text
    • https://unitedcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f79966fce5---widemujuxirepevi.pdfIn PDF document text
    • https://ssvacancy.com/ckfinder/userfiles/files/parafofapemafu.pdfIn PDF document text
    • http://bona-agra.pl/Upload/file/65784043839.pdfIn PDF document text
    • https://ocw.tw/uploads/files/16913995987.pdfIn PDF document text
    • http://pizzeriadevita.it/userfiles/files/dokajizaresosojuzanode.pdfIn PDF document text
    • https://jaunimodienos.lt/wp-content/plugins/super-forms/uploads/php/files/hdvloel05g3e9iq6rp6klelec0/xifowamizitugodegola.pdfIn PDF document text
    • http://www.galiantsolutions.com/emailimages/file/75050432886.pdfIn PDF document text
    • https://organicfertilizerproduction.com/d/files/68845979949.pdfIn PDF document text
    • http://bannhuaduong.net/upload/files/97421927273.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c531.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC531 15516 bytes
SHA-256: 8aa0b1b8e7f96fe1a974e07e35c14619186351a873ba732cbadb4087052b6b36
font_01_sfnt_off0000ec60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC60 10844 bytes
SHA-256: 696ea4db12d9eca2ace813b7bed24bda74b304c626a7607d65ca56c4af700859
font_02_sfnt_off00010542.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10542 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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