Malicious PDF — malware analysis report

Static analysis result for SHA-256 99044d01491dd568…

MALICIOUS

PDF

90.0 KB Created: 2021-07-06 22:16:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 8841bb0666939019ecb3225461763d51 SHA-1: 80ec0b5fcfb1c3e1d504320f7b67c5190bd87554 SHA-256: 99044d01491dd568f9a25000369eb9c923a276433f1d37950bc556006dfbcd93
196 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1566.001 Spearphishing Attachment

This PDF document was flagged by ClamAV as a phishing trojan. It contains a 'clipboard command execution lure', instructing the user to copy and paste commands into a shell, which is a common technique for downloading and executing secondary payloads. The document also hosts numerous links on compromised CMS upload storage and disposable hosting, suggesting a distribution mechanism for malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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://www.femregenx.co.za/wp-content/plugins/super-forms/uploads/php/files/h2p2c8epkib75pps9kbkpjdta1/32036911328.pdf
    • http://beetsom.com/PROGRAM_FCKeditor_UserFiles/file/135381744960e374ace1aa2.pdf
    • https://keralatemples.info/ckfinder/userfiles/files/xeketakitukavuxezavotaju.pdf
    • http://toonesk.com/upload/lofajixazivut.pdf
    • http://adabaskimerkezi.com/upload/file/38377617631.pdf
    • http://kfbi.ru/content/file/75047545909.pdf
    • http://anhuishangbiao.com/upload_fck/file/2021-6-28/20210628052244413020.pdf
    • https://deniz-sogutma.org/img/userfiles/file/vejotofoniwowofavireta.pdf
    • http://asesoriagarpe.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5c62bd46a4---gebevaxarozezodiki.pdf
    • https://qualitylightsolutions.com/wp-content/plugins/super-forms/uploads/php/files/85165d5d6940878b37c3dff942f238d7/rerizenu.pdf
    • http://www.segurosfacility.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609414d42dedb---liporuj.pdf
    • http://www.korayozelguvenlik.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082ddb0813ed---zuvazijifujomenatafi.pdf
    • http://ewhamd.net/upFiles/ckeditor/files/meluxofalenowebisumizoloj.pdf
    • http://www.segurosfacility.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16072ae3a94575---21383722439.pdf
    • http://graviroz.hu/ckfinder/userfiles/files/vofozijazekesazemim.pdf
    • https://www.parkgest.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1608687b62c530---mezopusa.pdf
    • https://avis-medical.ma/wp-content/plugins/super-forms/uploads/php/files/f067f94875332ced3a2b1dbc2ccdc2cb/jawowemetemujufukox.pdf
    • https://pointsourcegroup.com/wp-content/plugins/super-forms/uploads/php/files/6263eac70024a8b2394445fa07eede59/60642912587.pdf
    • http://itineraire-consulting.com/ckfinder/userfiles/files/zurifobivimuxemuj.pdf
    • https://www.lenoir-elec.com/wp-content/plugins/super-forms/uploads/php/files/a3fa6ud4mkurv55e44ac89c1ih/tatulepo.pdf
    • http://slphs66.com/clients/e/e6/e62fa13cff665df70d7481f632b33819/File/18708002927.pdf
    • https://www.federatedlighting.com/wp-content/plugins/super-forms/uploads/php/files/d6845a1d864e43929062090f4c1184b6/5171005301.pdf
    • http://adveotec.com/img/file/7981785219.pdf
    • http://sad-azov.ru/wp-content/plugins/super-forms/uploads/php/files/c6f476decb3ee52565e5cfddcfcc4ec7/totumogegapomilomib.pdf
    • http://www.itbaloch.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609830066d1a0---xexel.pdf
    • https://relleno-acidohialuronico.com/wp-content/plugins/super-forms/uploads/php/files/63ef920e786fb425c1f8a73441c8efaf/55727661045.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=windows+10+product+key+text+file
    • 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_off0000fa1a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xFA1A 16792 bytes
font_01_sfnt_off0001122c.bin
e3259a4453461032667a7a5b2311e13fc63f2303ac4adf91d743c04a012af49f
pdf-font-stream PDF embedded font (sfnt) at offset 0x1122C 17652 bytes
font_02_sfnt_off00014097.bin
0761f49fb8cabb4f9226b12208cb8bb1a30bb00fa3129b60b0a93eb7ac8f6e15
pdf-font-stream PDF embedded font (sfnt) at offset 0x14097 11112 bytes