Malicious PDF — malware analysis report

Static analysis result for SHA-256 6df054310ccd988e…

MALICIOUS

PDF

78.7 KB Created: 2021-09-01 15:47:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: dd72dcb487a81d903b88a8445976cdc6 SHA-1: 626e3ce3fe55b2dc29410310b5c9e9bf816d4a33 SHA-256: 6df054310ccd988e0cd68875bdd8d43c1d8bceaea9d8a6acdf2e35da935d4f81
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier as malicious. It contains numerous external URIs, many of which point to compromised CMS uploads or are part of a link farm on disposable hosting, suggesting an attempt to redirect users to malicious sites. The embedded JavaScript stream further indicates potential for malicious activity, likely to facilitate the redirection or download of additional payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://huntic.ru/uplcv?utm_term=jph+consult+me+general+english+pdf PDF link annotation
    • https://banghenails.com/upload/file/98920683928.pdfIn PDF document text
    • http://www.deadclan.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16073ab14391b4---pekosogajefigan.pdfIn PDF document text
    • http://ibtaker.ps/userfiles/file/gabefujawova.pdfIn PDF document text
    • https://wavemed.it/wp-content/plugins/super-forms/uploads/php/files/9bfe9958704bf92b026d48bf0c14844b/74086809499.pdfIn PDF document text
    • http://rtm-plus.com/ckfinder/userfiles/files/teruborinofikeweriritew.pdfIn PDF document text
    • http://sun-green.de/ckfinder/userfiles/files/56892776782.pdfIn PDF document text
    • http://www.xpresswedding.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611502ca1382a---97995699520.pdfIn PDF document text
    • https://jasz-pap.hu/UserFiles/file/wasodulozuzezesufimixi.pdfIn PDF document text
    • https://kfz-gutachter-oliver-schiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/160faeadd13449---zidubufofoj.pdfIn PDF document text
    • https://nuevocoach.co.uk/wp-content/plugins/super-forms/uploads/php/files/9cabab857bc1fc9c5c8147c61362a1f7/51260878763.pdfIn PDF document text
    • http://www.alfainstal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160a16156b8370---feloziwadojuxejurefi.pdfIn PDF document text
    • https://hmv.ir/wp-content/plugins/formcraft/file-upload/server/content/files/16073b7578409e---87283412528.pdfIn PDF document text
    • https://seroinstitute.com/wp-content/plugins/super-forms/uploads/php/files/f88bac5ac49204c5096b87b1d323b40d/binamufedonopobiderawuka.pdfIn PDF document text
    • http://topopentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612ea3dbe3289---radorevekozik.pdfIn PDF document text
    • http://www.luminicaambiental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c11d4809f44---wujaxinobage.pdfIn PDF document text
    • http://ildungrice.com/fileupload/fckeditor/file/kedusogababipogofaj.pdfIn PDF document text
    • http://atallmed.com/userfiles/files/zanideguxejowagor.pdfIn PDF document text
    • https://imad0c0.com/js/ckfinder/userfiles/files/50250192173.pdfIn PDF document text
    • http://accessiblevehicleservices.com/userfiles/file/51167200984.pdfIn PDF document text
    • http://www.aadhar-interior.com/userfiles/file/42643536868.pdfIn PDF document text
    • https://goactive.hu/wp-content/plugins/super-forms/uploads/php/files/7a38d1a59b2522be4f5921455ed32a67/84630753642.pdfIn PDF document text
    • http://associatedreclaimed.com/userfiles/files/62057143788.pdfIn PDF document text
    • https://clarkfamilybuilders.com/home/clark/public_html/ckfinder/userfiles/files/pukujaze.pdfIn PDF document text
    • https://mercedesmazo.es/wp-content/plugins/formcraft/file-upload/server/content/files/160b31fc534f65---zapeletaz.pdfIn PDF document text
    • https://gulertrafik.com/wp-content/plugins/super-forms/uploads/php/files/gr6rleoh36fhg503gcvc1jrti4/96158143902.pdfIn PDF document text
    • http://surll.com/10fIn 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_off0000cc80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC80 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e497.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE497 11160 bytes
SHA-256: f1929c7d319b867c4aa7fac5f90e07bff399ede77d2f5d368a1d4a9d1f0d0c74
font_02_sfnt_off0000fe46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE46 17868 bytes
SHA-256: b312f96eb315b257a8e70c23db577665e80b6fc1a3a13af6abb8e5bad0e3a012

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