Malicious PDF — malware analysis report

Static analysis result for SHA-256 84dae8a91969dbe1…

MALICIOUS

PDF

66.5 KB Created: 2021-07-30 14:49:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 856c038cec7dd694b7651e39ed2f3f4d SHA-1: a88a7552b0630f17a07b81e2706bc6d613097c5e SHA-256: 84dae8a91969dbe115fcf4cd267e9654379d35e1ad5424188c02ca6a9713b6e7
154 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, indicating a high likelihood of malicious intent. It functions as a link farm, with numerous embedded URLs pointing to compromised WordPress uploads and other disposable hosting sites. These links likely lead to phishing pages or further malware downloads, consistent with a spearphishing attachment delivery vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9054

Heuristics 5

  • 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.
  • 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=what+does+rational+religion+mean+in+science PDF link annotation
    • http://rallyteamwalraven.nl/file/zixexitotokowubupe.pdfIn PDF document text
    • http://cngwalk.com/fckeditor/userfiles/image/suzizuvetuxusovimuru.pdfIn PDF document text
    • http://urbanconstructions.org/images/uploadedimages/file/disinat.pdfIn PDF document text
    • http://mjsolankifoundation.com/fck/imagesfile/tudasafaluzagepowelorito.pdfIn PDF document text
    • https://maxim-catering.de/wp-content/plugins/super-forms/uploads/php/files/r2tfsd9gd4vjf67m8kc8d89kt9/fitobajugikal.pdfIn PDF document text
    • https://lightingsystemscol.com/wp-content/plugins/super-forms/uploads/php/files/ee4aa8a0c08dbe0705436bebda3ab612/41581497762.pdfIn PDF document text
    • http://imagespa.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1607dc571c82ce---lakadaxipe.pdfIn PDF document text
    • https://www.ikedatosou.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae9157d0d90---nujuselileku.pdfIn PDF document text
    • http://lichnyiybrand.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a44393d73f9---puxufuwosetazobixuvifafi.pdfIn PDF document text
    • http://mousike.it/img_ins/files/47757160041.pdfIn PDF document text
    • https://action-roofing.com/wp-content/plugins/super-forms/uploads/php/files/572fc632ffb019cc8c9a66858bb1e892/54336664207.pdfIn PDF document text
    • http://ud2-140.com/files/1252229101.pdfIn PDF document text
    • http://bnblspecialities.com/userfiles/files/xexirovovijozi.pdfIn PDF document text
    • http://sts-logistika.ru/wp-content/plugins/super-forms/uploads/php/files/39b7a29f012d72204a09b0fbfe6b1e4a/67987299129.pdfIn PDF document text
    • http://tanphatinst.com/vietkiendo/upload/file/fenozokelenidodarawevez.pdfIn PDF document text
    • http://gemwishrs.com/ckfinder/stones/files/mevoma.pdfIn PDF document text
    • http://sake2metustin.com/uploads/files/padatisibizejiraka.pdfIn PDF document text
    • https://notofthisgalaxy.com/wp-content/plugins/super-forms/uploads/php/files/raq7u4j4nnlpgaers7njvjo1mt/nipixinajunul.pdfIn PDF document text
    • https://www.infrascale.com/wp-content/plugins/super-forms/uploads/php/files/f06c0c71d0fa0768cde27ef32b510d4f/xitajijuwubexat.pdfIn PDF document text
    • http://herodumpsterrental.com/wp-content/plugins/super-forms/uploads/php/files/05d0c03cbf894bfc799fd014325ebd45/nopukigewuledasam.pdfIn PDF document text
    • https://kmkmekanik.com/upload/ckfinder/files/57789816229.pdfIn PDF document text
    • https://teplitsyoptom.ru/wp-content/plugins/super-forms/uploads/php/files/f7f73c8e3c08fdb29b46dd187864c0fd/zidujadelijo.pdfIn PDF document text
    • https://omomediacion.com/wp-content/plugins/super-forms/uploads/php/files/37820f7d8057ae89e4a47ba387a2009f/numepavobetopatudij.pdfIn PDF document text
    • http://absolutelyneon.com/userfiles/file/kilamotekopewemazo.pdfIn PDF document text
    • http://marinapogon.pl/upload/file/garekadinigixitedebalumo.pdfIn PDF document text
    • https://gdr.co.il/wp-content/plugins/super-forms/uploads/php/files/0ba78ee3b12fb0d0876343755aa7fd05/57968237882.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_off0000f5b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5B0 10808 bytes
SHA-256: 9a53a2bbd745c1549f0ef06c8585370116c36c5e93599af4cb741f5c5b581f66