Malicious PDF — malware analysis report

Static analysis result for SHA-256 33733afb565c551d…

MALICIOUS

PDF

42.9 KB Created: 2021-08-18 17:04:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 5d6c9463523d256af0bc0bfcf353d5d6 SHA-1: 2d4c0b35b6f1a0ffa316ba943ebb3999caead12b SHA-256: 33733afb565c551d99fae869a06a2e65340b44d763004c837d9488667ee3f937
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document is identified as malicious by multiple heuristics and a machine learning classifier, with ClamAV flagging it as a phishing trojan. The document appears to be an image-only lure, typical of phishing campaigns, designed to trick users into clicking embedded links. These links predominantly point to compromised WordPress sites and other domains, likely serving as landing pages for further exploitation or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7092

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
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 42 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://oniceh.ru/uplcv?utm_term=brown+iverson+anslyn+and+foote+organic+chemistry+8th+edition+%26+study+guide PDF link annotation
    • https://masterok-kovka.ru/wp-content/plugins/super-forms/uploads/php/files/526621018dae4da5122d6cbda97a2c21/buromebajulisajosuzuf.pdfIn PDF document text
    • https://thriveelearning.com/wp-content/plugins/super-forms/uploads/php/files/eddb38db8a603217e12929a57f6e4e4f/54126139998.pdfIn PDF document text
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/a75537bf5206e31ce86618306ae0e8b5/23158028685.pdfIn PDF document text
    • https://duproject.com/uploadEditor/files/6677453476.pdfIn PDF document text
    • http://sciattella.net/images/file/39289116282.pdfIn PDF document text
    • https://vcvscr.cz/www/www/fckphotos/file/77384318428.pdfIn PDF document text
    • https://aihr-iadh.org/uploads/FCK_files/file/kapetevefe.pdfIn PDF document text
    • https://kvkumariajnkvv.org/singhania/downloads/file/tudazedafina.pdfIn PDF document text
    • https://hunde-katzen.at/soubory/25729525141.pdfIn PDF document text
    • https://sandalyecenneti.com/wp-content/plugins/super-forms/uploads/php/files/8o0hejpunvhk9v0preujdaloo1/davefojibugigipisowigobib.pdfIn PDF document text
    • http://sedaciesupravy.sk/media/file/lesobazavepip.pdfIn PDF document text
    • https://regalcabs.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160aebe655ba41---majusekovujow.pdfIn PDF document text
    • http://ovartec.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607dd9c8ae3d9---godonojobarixalexakawik.pdfIn PDF document text
    • https://na-nule.ru/wp-content/plugins/super-forms/uploads/php/files/q3cacltvtlfkej4cuhejdsmu47/rojifa.pdfIn PDF document text
    • https://performanceltg.com/wp-content/plugins/super-forms/uploads/php/files/d1063e72e52c2fb225b9cb021eda9feb/60506051793.pdfIn PDF document text
    • https://www.sussexweddingservices.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160715175483ac---26437219910.pdfIn PDF document text
    • http://softwarefactory.nl/images/file/57419009623.pdfIn PDF document text
    • http://historico.uts.edu.co/portal/app/ckfinder/userfiles/files/92046926462.pdfIn PDF document text
    • http://ghibms.com/userfiles/files/6718435264.pdfIn PDF document text
    • https://www.verpoort-bouw.be/wp-content/plugins/formcraft/file-upload/server/content/files/160a4c6f00b3ac---xofoledarofiwosi.pdfIn PDF document text
    • http://gsoam.ge/wp-content/plugins/formcraft/file-upload/server/content/files/16075bbfdb5fb4---gozubibireg.pdfIn PDF document text
    • https://jclifeschools.org/wp-content/plugins/super-forms/uploads/php/files/5a7c80d87fdbde32a2d5a9bdec4c639a/jebadibefotapevadiredo.pdfIn PDF document text
    • https://www.frankreich-ferien.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160ae82d8dd4f4---21597855772.pdfIn PDF document text
    • http://parkwestresidences.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607346cce4753---77059035140.pdfIn PDF document text

Open this report in the interactive analyzer, or submit your own file for analysis.