Malicious PDF — malware analysis report

Static analysis result for SHA-256 fdb268c0506b27b6…

MALICIOUS

PDF

83.7 KB Created: 2021-09-01 12:51:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: aae6db4945797785b003646c29acd1a5 SHA-1: 4d27b6c15343179e0016124a2a3cd2a40f6ab2d2 SHA-256: fdb268c0506b27b6b9a6c899180930dbd1cd25bc7ee531ae0098bc1975d23175
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as malicious and by an ML classifier. The 'Clipboard command execution lure' heuristic indicates the document instructs users to interact with command-line interfaces, a common technique for executing malicious code. The numerous embedded URLs, many pointing to compromised CMS upload storage or disposable hosting, suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • 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://oniceh.ru/uplcv?utm_term=dockerfile+with+volume
    • http://akinmedikal.com/uploads/file/mibemixuligirin.pdf
    • https://www.luthier-auxerre.fr/ckfinder/userfiles/files/79983983353.pdf
    • http://carsonpokebar.com/uploads/files/mudojitafu.pdf
    • http://kaplanpm.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612187097248f---raduzodatuxuzebumuso.pdf
    • https://3dreamstudios.com/wp-content/plugins/super-forms/uploads/php/files/b248b514230a0bdeb3808164f383c55c/75704251134.pdf
    • http://geredekombiservisi.com/userfiles/file/xerewetuk.pdf
    • https://ohligschlaeger-berger.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608d98661d9b7---tuvovavimamewarobox.pdf
    • https://harpethvalleyhealth.com/wp-content/plugins/super-forms/uploads/php/files/2b30ec645e13f6b213c6daf43445068e/resagafaku.pdf
    • https://kiptep.ru/file/rusadaka.pdf
    • https://dispomydeal.com/wp-content/plugins/super-forms/uploads/php/files/b556719e90d0c23a76a4478362b4dc10/seluzudugixedekobogib.pdf
    • https://debcopharma.com/userfiles/file/vajivonobakerala.pdf
    • http://www.zopfitravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb0797d03ad---telubulumifodo.pdf
    • http://meandnetworking.com/ckfinder/userfiles/files/mewoxobexivasovax.pdf
    • http://sun-green.eu/ckfinder/userfiles/files/zabizez.pdf
    • https://www.jahnigterbraak.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160910c25e12aa---1250347356.pdf
    • http://xn--h49avwqct32ewe967crscpsaz7d.com/ckupload/files/jupeduzodomezitovuwiw.pdf
    • https://aryaayur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f07c9f40ff---wedevejakesegolidesenu.pdf
    • https://anzmrrn.org/wp-content/plugins/formcraft/file-upload/server/content/files/16074d39e4565f---jegetibib.pdf
    • http://vasvaripalmuzeum.hu/upload/file/42849575783.pdf
    • https://nolimitscenter.be/peausitive/images/FCKeditor/file/jegikoladibolefamizodunum.pdf
    • https://memo-log.com/userfiles/file/lijumosorav.pdf
    • http://zamokugrofa.sk/admin/fckeditor/file/70744970233.pdf
    • http://s292376414.onlinehome.fr/datas/imgmail/file/dumedirabebuji.pdf
    • 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_off0000e1d9.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE1D9 16792 bytes
font_01_sfnt_off0000f9eb.bin
a5bda384f4d29e16e72960c78c337c45b869f69f40aabd16df9b70c2c4f8f076
pdf-font-stream PDF embedded font (sfnt) at offset 0xF9EB 18072 bytes
font_02_sfnt_off0001297d.bin
ff558ab663d84705bf176f798cfbc2a685293b0f1d31b179aeb32625fab1b34b
pdf-font-stream PDF embedded font (sfnt) at offset 0x1297D 10512 bytes