Malicious PDF — malware analysis report

Static analysis result for SHA-256 fccbef5dc2b0eaad…

MALICIOUS

PDF

84.6 KB Created: 2021-07-30 19:15:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: a160fcb072c775d7804feb34ba5b06c9 SHA-1: 10c647512a592a660857b0e74ca93e9dc2a63e7d SHA-256: fccbef5dc2b0eaad64ada01b23fef566460f0b84a31d2aa0d1ac1dd0be44391a
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan threat. It functions as a link farm, containing numerous URLs pointing to compromised WordPress sites and other disposable hosting. These links likely lead to malicious content or phishing pages, serving as the primary attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7492

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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
  • 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://chcial.ru/uplcv?utm_term=21+day+fix+log+book PDF link annotation
    • https://kasihpaham.com/contents//files/75229769264.pdfIn PDF document text
    • https://munord.com/wp-content/plugins/super-forms/uploads/php/files/472015165c1b7822799a1ccd23786eba/pomepoxeredutasufu.pdfIn PDF document text
    • https://www.travelticket.com.au/wp-content/plugins/super-forms/uploads/php/files/d6jepcu3k57dtiq1gcbru2jdcv/86406565223.pdfIn PDF document text
    • http://topopentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160727b4bca68b---69369838582.pdfIn PDF document text
    • http://bazatalty.pl/wp-content/plugins/super-forms/uploads/php/files/4ea42a9c0a1b807bee77ff7dce4fe207/vufesimozovuvem.pdfIn PDF document text
    • https://vivekanandbawwa.com/userfiles/file/wuxuzupesebefokajejitobur.pdfIn PDF document text
    • https://www.advids.io/wp-content/plugins/formcraft/file-upload/server/content/files/160788a870961d---74611488426.pdfIn PDF document text
    • https://saftanton.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160ae43af7c568---18725258277.pdfIn PDF document text
    • http://pvsystexperts.com/wp-content/plugins/super-forms/uploads/php/files/gqgmu83mkradvjhed4dm65ol82/84625159655.pdfIn PDF document text
    • http://kingspec.su/wp-content/plugins/super-forms/uploads/php/files/povhv9a9rs11kq0lcfa6c9l9ic/getatufoxoxuwixakosuko.pdfIn PDF document text
    • http://aksaxena.com/bpms/includes/fckeditor_uploads/userfiles/file/sogovero.pdfIn PDF document text
    • https://relleno-acidohialuronico.com/wp-content/plugins/super-forms/uploads/php/files/81f661a83472d0be8f993870f5319a79/49706641581.pdfIn PDF document text
    • http://allamericannursing.com/userfiles/file/17153283791.pdfIn PDF document text
    • https://parfumzone.ro/files/file/83611065145.pdfIn PDF document text
    • https://vanvoorst.info/uploaded/file/14332892215.pdfIn PDF document text
    • http://heizler.hu/files/file/lamugofomimexolafi.pdfIn PDF document text
    • http://www.radeton-cz.vasestranky.cz/ckfinder/userfiles/files/57610636629.pdfIn PDF document text
    • https://terravistahometeam.com/wp-content/plugins/super-forms/uploads/php/files/fc581be8cb9f97b41248cd737c155ebf/fixub.pdfIn PDF document text
    • https://hightechrustremovers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160afdaae360ec---fidutazedavaporowufugara.pdfIn PDF document text
    • https://interesttour.com/wp-content/plugins/super-forms/uploads/php/files/cb224f61abdf496e68d4c9e709750f3d/tikuvoximino.pdfIn PDF document text
    • https://macleanpinesdrivingschool.com.au/wp-content/plugins/super-forms/uploads/php/files/86429e4427df455b736e2818d8f3118d/xujezenirepasipabog.pdfIn PDF document text
    • http://fitviewer.biz/files/file/jomovuzewituvugaxutugeva.pdfIn PDF document text
    • https://teenvolunteer.org/wp-content/plugins/super-forms/uploads/php/files/f03d5523078cdff44bdd5ab6ca561c8f/wubulunudovitukilunurumo.pdfIn PDF document text
    • https://www.harnoordesigns.com/wp-content/plugins/super-forms/uploads/php/files/cd5682f67f8fc75af867137bb1c891e2/jevesixonobevo.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010ff6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FF6 17260 bytes
SHA-256: 2d6ef0432a3858afa423dce59673c3ff4c92061b8f7643fef47317fd5494bcd1
font_01_sfnt_off00013d19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D19 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1