Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0012e60f4d5c37a…

MALICIOUS

PDF

86.0 KB Created: 2021-08-16 17:21:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: f1438c198d7688a2586db2da8a312aae SHA-1: ff9357b099e615b05edeea071f30fb2d36947e63 SHA-256: c0012e60f4d5c37a63183a9b48bc8746ef7473a02e0733b9544941cb4c767f24
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous links pointing to compromised WordPress uploads and other disposable hosting, suggesting a phishing or malware distribution scheme. The presence of external URIs and a link farm on potentially compromised sites indicates an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8341

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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 http://sakirnoopo.ru/wp-content/plugins/super-forms/uploads/php/files/40f528bf7509877f5aad327d678162cc/zotajiwugexomimurud.pdf In PDF document text
    • http://jrpst.pl/userfiles/file/67271653657.pdfIn PDF document text
    • http://yjsyrj.com/userfiles/file/9452430707.pdfIn PDF document text
    • https://kuepancong.com/contents//files/tipafimuratejozowuxib.pdfIn PDF document text
    • http://hersheyhigh1981.com/clients/37302/File/37627128681.pdfIn PDF document text
    • http://impactpluslearning.com/ckfinder/userfiles/files/jaxogikanutesabap.pdfIn PDF document text
    • https://evocative.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1608770a3785ef---96082314801.pdfIn PDF document text
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/16096d6aede542---55508327962.pdfPDF link annotation
    • http://appletechsolutions.com/userfiles/file/7459564501.pdfIn PDF document text
    • https://irisapp.cn/uploadfiles/fckeditor/20210803/file/16279576579109.pdfIn PDF document text
    • http://sciencevier.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e70cc6a2879---kufukabinubewoxaxakabu.pdfIn PDF document text
    • https://www.llgnjinc.com/wp-content/plugins/super-forms/uploads/php/files/53af1c67300e4d9a3a8002b8c855b866/guwiwewitusazof.pdfIn PDF document text
    • http://dotbamboo.com/file_media/file_image/file/66411838930.pdfIn PDF document text
    • http://stroi-sistema.ru/img/jufufipobusarijax.pdfIn PDF document text
    • http://myjobcareer.net/userfiles/file/2021052216330273499.pdfIn PDF document text
    • http://www.etoiles-recrutement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c4e45e6ea94---37312786742.pdfIn PDF document text
    • https://stakeoutllc.com/wp-content/plugins/super-forms/uploads/php/files/d038d56e454a58563d4dd86a7975a491/11647523506.pdfIn PDF document text
    • http://flemingfamilies.org/clients/8/8a/8af36a28baf44bfc7b8a7004fb4eaede/File/lupuzakemijiko.pdfIn PDF document text
    • http://ugyvednok.hu/userfiles/file/76485413947.pdfIn PDF document text
    • http://www.rec39.ru/wp-content/plugins/super-forms/uploads/php/files/6310d91e6bda00ea9a8be2bec18c0171/bobavowudizemawan.pdfIn PDF document text
    • http://haciogullari.com/depo/sayfaresim/file/mutareritav.pdfIn PDF document text
    • https://www.nosolodespedidas.es/wp-content/plugins/formcraft/file-upload/server/content/files/16096d04e9ca6c---lafereditipefusufuba.pdfIn PDF document text
    • http://spalovnachemolak.sk/userfiles/file/gupeba.pdfIn PDF document text
    • https://www.web2business.pt/wp-content/plugins/formcraft/file-upload/server/content/files/1608a7c7feeaf4---vewoteleladepal.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=core+python+programming+nageswara+rao+pdf+second+editionPDF link annotation
    • 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_off0001127d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1127D 11252 bytes
SHA-256: 159cb3235c3b5f7d7283ed2ee1852001d1c1923dfad83440df39293edeab36b4
font_01_sfnt_off00012c9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C9E 17908 bytes
SHA-256: b5abb22e21f7f6710ac440ebc0879a6bf3250edd073ae0226fa627a9c2e99a09