Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9202be84258c2d4…

MALICIOUS

PDF

107.9 KB Created: 2021-09-04 05:00:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 34f77840958c172231800cfd53046818 SHA-1: 367d0af3be5ed8ab09cf8ce853c1327a4a228949 SHA-256: d9202be84258c2d45708805a3034a2903c347ada8199c95aa9d7316e7eabc959
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. It functions as a link farm, containing numerous URLs that point to compromised WordPress upload directories. These links are likely used to distribute phishing content or further malware payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://queure.ru/uplcv?utm_term=biophilic+design+stephen+kellert+pdf PDF link annotation
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610b0e6f06761---gagolotadowebipitol.pdfIn PDF document text
    • http://www.stockholmswingallstars.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e615daa0b4---14004490140.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1609ff5ffc1882---74110271263.pdfIn PDF document text
    • http://www.hollyskauaicondo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095728169380---89004330900.pdfIn PDF document text
    • http://icsbc.ru/fuploader//file/jobotoj.pdfIn PDF document text
    • http://pi-consulting.ch/download/xusume.pdfIn PDF document text
    • http://dailygameresult.com/editor/UserFiles2/files/51585430953.pdfIn PDF document text
    • https://tmtteks.com/files/74239216413.pdfIn PDF document text
    • http://thedewakohchang.com/image/upload/File/3310100953.pdfIn PDF document text
    • https://efficimm.fr/userfiles/files/21206593899.pdfIn PDF document text
    • http://summitremodelinginc.com/userfiles/files/lisasizamotolunexiz.pdfIn PDF document text
    • https://mysmartedu.com/uploadimages/files/78733628915.pdfIn PDF document text
    • https://www.fmworks.com.tr/wp-content/plugins/super-forms/uploads/php/files/idf9qq3t7uqbl9cth7i5hdu2g9/wizawikasaf.pdfIn PDF document text
    • https://rumputhijau.com/contents//files/32504918132.pdfIn PDF document text
    • https://too.kg/wp-content/plugins/super-forms/uploads/php/files/cdc2b3f714967fb4d9e340835486d389/5192821544.pdfIn PDF document text
    • https://freedomtampons.com/wp-content/plugins/super-forms/uploads/php/files/d511290e53b5a7cc5aa3f108c04de0b1/xunumasijapubowibuwev.pdfIn PDF document text
    • https://reifenscho.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609f2e7527f26---29851064024.pdfIn PDF document text
    • https://www.harasportcenter.com/wp-content/plugins/super-forms/uploads/php/files/m6qa2d999h6miam99l1mq7n2v8/45988515040.pdfIn PDF document text
    • http://mudrkanuch.sk/editor_uploads/system/files/46970050928.pdfIn PDF document text
    • http://haiphongcontest.com/images/files/26483168592.pdfIn PDF document text
    • http://seamcc.com/UserFiles/files/berawovovimutoluwijuz.pdfIn PDF document text
    • http://www.studiolegalefusimorelli.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609dadb96c113---bomivuvuzajamodarobufof.pdfIn PDF document text
    • https://weboonline.com/ckfinder/userfiles/files/12382904374.pdfIn PDF document text
    • https://freedomtampons.com/wp-content/plugins/super-forms/uploads/php/files/97843d2cacf5ed9a9243e41807c73400/vinavomapar.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_off00013f54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F54 18964 bytes
SHA-256: 9983108d8251f936537c23b3e9156fcffab5a90ef1780d34aa590d751bca2134
font_01_sfnt_off0001710e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1710E 10884 bytes
SHA-256: f63e61cd40212c64f361b4427bce25bda0ae9729b6689a4d9e414c3822c531bb
font_02_sfnt_off000189fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x189FE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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