Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa126c51dbf92d30…

MALICIOUS

PDF

56.8 KB Created: 2021-10-08 04:48:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 6458efb2f265ad54f0cd7fea0cbca1cc SHA-1: 80aa0072417270f6dfe0709cf8039203e99bad0e SHA-256: aa126c51dbf92d307dc8d4ef2d3689c9d6a5de474f2a60470b3f3b6c79588b5b
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable domains, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent. The file's structure and URL patterns are consistent with a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6236

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 http://safiorida.nl/operatori/userfiles/file/sutugevelitivozabesapule.pdf In PDF document text
    • https://groupburuemas2.com/contents/files/37441084925.pdfIn PDF document text
    • https://retake.dk/ckfinder/userfiles/files/wedexesixu.pdfIn PDF document text
    • http://proclima-membranes.ru/userfiles/file/29799814573.pdfIn PDF document text
    • https://www.pal-kont.hu/wp-content/plugins/super-forms/uploads/php/files/6e01192e33dc4cb4bb4d0eb3f918827a/34692452987.pdfIn PDF document text
    • https://miminku3.com/contents/files/kunulofuna.pdfIn PDF document text
    • https://taiwan-tiaya.com/upload/tiaya_official/files/90818583236.pdfIn PDF document text
    • http://nc-israel.ru/upload/files/63877603444.pdfIn PDF document text
    • http://nuyewpilot.academy/wp-content/plugins/super-forms/uploads/php/files/a41fb69731c5430f03997b8ca47b30d3/69873073513.pdfIn PDF document text
    • http://intersonik.eu/upload/files/jiwem.pdfIn PDF document text
    • https://my-natural-style.net/upload/files/kogumunalu.pdfIn PDF document text
    • http://ryanoomen.nl/uploadimages/files/dijaxumejolaxasezo.pdfIn PDF document text
    • https://prettygreekvillas.com/admin/fckeditor/editor/filemanager/connectofile/24747473910.pdfIn PDF document text
    • http://bon-mar.com/fck_user_files/file/jirivebojizajazovezu.pdfIn PDF document text
    • http://pribatu.lamilagrosaimport.com/images/files/59389045917.pdfIn PDF document text
    • http://tygodnikzuzlowy.pl/ckfinder/userfiles/files/fepakejexeva.pdfIn PDF document text
    • https://www.oalysa.cz/ckfinder/userfiles/files/limanibuben.pdfIn PDF document text
    • https://bimore.vn/webroot/img/files/33179535275.pdfIn PDF document text
    • http://maekuangudomthara.com/ckfinder/userfiles/files/98090328807.pdfIn PDF document text
    • https://osakaav.com/userfiles/files/xozokasuxosikud.pdfIn PDF document text
    • https://www.taxiserviceh24.com/wp-content/plugins/formcraft/file-upload/server/content/files/16141aa6319328---vonujusununekesog.pdfIn PDF document text
    • https://iamtimeshare.com/userfiles/file/notetisawiguzezosebesi.pdfIn PDF document text
    • http://neboskreb-irk.ru/uploads/userfiles/files/21033477264.pdfIn PDF document text
    • http://denki-shonan.com/uploadsfile/pejuvafes.pdfIn PDF document text
    • http://danangsculpture.com/uploads/image/files/21495424837.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=news+of+the+worldPDF link annotation

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