Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f47c6fcbcdc498d…

MALICIOUS

PDF

95.7 KB Created: 2021-09-02 17:23:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 5c1d04e8c2db1b5777f7777499b3db4a SHA-1: 447adb1693417bfea1cac5c594ce3a3d1c31baad SHA-256: 1f47c6fcbcdc498d48b94e37f3a78502c73302cc814e76a03f2171a3b8f941bd
132 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, forming a link farm. The presence of embedded JavaScript and a ClamAV detection for 'Pdf.Phishing.Trojan' strongly suggests malicious intent, likely to lure users to phishing sites or download further malware. The primary attack pattern involves leveraging these links to deceive users.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3947

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.
  • 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
  • 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://laborke.ru/uplcv?utm_term=cross+sectional+anatomy+ct+and+mri+pdf PDF link annotation
    • http://artospace.com/pics/file/wukabaratuliboxadajimeli.pdfIn PDF document text
    • https://www.denisonlandscaping.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c21690d17c7---95074526651.pdfIn PDF document text
    • https://ipcare.nl/wp-content/plugins/super-forms/uploads/php/files/viu9j4t2pmbm5in2iv9p9b8hko/tasemarodufumo.pdfIn PDF document text
    • http://imi.vc/upload/files/32563506109.pdfIn PDF document text
    • https://www.pal-kont.hu/wp-content/plugins/super-forms/uploads/php/files/9835f90a43ae3e80773e72bc36bddfb2/50298327896.pdfIn PDF document text
    • http://www.deadclan.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608ebea1de863---wagibinikobosijiwekar.pdfIn PDF document text
    • https://dfa-finanz.de/wp-content/plugins/formcraft/file-upload/server/content/files/16099638f2ce20---kixosefagugarifeto.pdfIn PDF document text
    • http://12shio5.com/contents//files/30278773655.pdfIn PDF document text
    • http://cuacongtudongbinhduong.com/upload/files/zilujeruvexuniv.pdfIn PDF document text
    • http://drinkandshrink.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607fefa42a677---mefowi.pdfIn PDF document text
    • https://www.straightmyteeth.com/wp-content/plugins/super-forms/uploads/php/files/60ea75b0db42aa2a3de90b89672ae8cf/tatanenuvewefok.pdfIn PDF document text
    • https://nuregio.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606d985e4eb76---53019514142.pdfIn PDF document text
    • https://segurosjdd.com/wp-content/plugins/super-forms/uploads/php/files/gedvam755ejdjqbrhlja4p3054/86005001234.pdfIn PDF document text
    • http://bungefamily.com/clients/5233/File/38161050638.pdfIn PDF document text
    • http://creaorganization.com/depo/sayfaresim/file/givobexojavaxiluwusivopav.pdfIn PDF document text
    • http://frederickfollows.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160c02dcc9b87b---65557625054.pdfIn PDF document text
    • http://www.phsdcenter.com/temp/js/ckfinder/userfiles/files/suvalejurisu.pdfIn PDF document text
    • https://stcatherine.ac.ug/wp-content/plugins/formcraft/file-upload/server/content/files/16094ba32bdedd---wopev.pdfIn PDF document text
    • http://spy-military-labs.com/userfiles/file/79727642742.pdfIn PDF document text
    • https://medgarlci.com/wp-content/plugins/super-forms/uploads/php/files/42376ba0ab72bf52fa6af03ad1502de6/98331512280.pdfIn PDF document text
    • https://bringem.de/wp-content/plugins/super-forms/uploads/php/files/ee4c8c931f52f26f70940f9e211e332f/48688861013.pdfIn PDF document text
    • https://lacecinella.com/writable/public/userfiles/file/vujirusofagov.pdfIn PDF document text
    • http://parcroyale.hk/userfiles/85802310361.pdfIn PDF document text
    • http://mh-gartengestaltung.de/userfiles/file/27470910727.pdfIn PDF document text
    • http://gruppocinofilomarsalese.com/userfiles/files/jatibilawaludoxepo.pdfIn PDF document text
    • http://lowchens.org/userfiles/file/92133867936.pdfIn PDF document text
    • http://tinhdaurosa.com/Images_upload/files/nigopiwiz.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001570f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1570F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1