Malicious PDF — malware analysis report

Static analysis result for SHA-256 b63704c1554bc3c7…

MALICIOUS

PDF

73.4 KB Created: 2021-07-27 13:03:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21
MD5: acbf2ff5758706c0f14e01a88cbba0ac SHA-1: 207d003a177773ff013a76bf9bbc9564decdcd9b SHA-256: b63704c1554bc3c7b73b1bbb939a18d4788cf72356bd64220ea1abb5bba0660a
154 Risk Score

Malware Insights

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

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 various websites, many of which are hosted on compromised CMS platforms or disposable domains. The primary purpose appears to be directing users to external sites, potentially for phishing or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7171

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 http://expertsystemgroup.com/file_media/file_image/file/lonali.pdf In PDF document text
    • http://www.awakohchang.com/image/upload/File/alazowo.pdfIn PDF document text
    • http://ewinghighclassof1963.com/clients/e/e4/e4cb61fc1babc639533983e887b7272d/File/jogepesu.pdfIn PDF document text
    • https://ozsersogutma.com/upload/files/80711364650.pdfIn PDF document text
    • https://bindazzled.com.au/wp-content/plugins/super-forms/uploads/php/files/d28e7c6b9ed46706263b42091160a28d/bedapiwalitarigobo.pdfIn PDF document text
    • http://argyleliquidations.com/userfiles/files/galovofuwiruxumid.pdfIn PDF document text
    • https://www.dekleinewerf.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160ca6854b0176---52299604625.pdfIn PDF document text
    • http://zonwering-nederland.com/ckfinder/userfiles/files/xixesusuxigawataxabe.pdfIn PDF document text
    • https://diversified-nj.com/wp-content/plugins/super-forms/uploads/php/files/d2ac6b63afb137c4bd430dd6d4d065ed/92047222109.pdfIn PDF document text
    • http://fw-simple.com/uploads/files/79961378363.pdfIn PDF document text
    • https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/19fa7ce107bf3327607cc14405da5001/52142631880.pdfIn PDF document text
    • https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/5eotds82qeoju0v01np46oatmu/74081258084.pdfIn PDF document text
    • http://jtylek.pl/Upload/file/fedobobarixufu.pdfIn PDF document text
    • https://heritagelogs.com/wp-content/plugins/super-forms/uploads/php/files/fmpf03dish4n4netnpdujqvmul/jawafizopiwuva.pdfIn PDF document text
    • https://sjalikave.hu/pictures/file/jenujikasivezusetarig.pdfIn PDF document text
    • http://wbbray.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609943aec5120---bafemuv.pdfIn PDF document text
    • http://schodylux.pl/userfiles/file/vatupiborun.pdfIn PDF document text
    • https://heider.ru/wp-content/plugins/super-forms/uploads/php/files/e648c022e92d33d5d0608ac5005c67bd/fegenimoderegiwefonex.pdfIn PDF document text
    • https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/751491c5c6758241ce6f1237c0745e28/rovugoduwomelexuxiraz.pdfIn PDF document text
    • http://glina-master.ru/admin/ckfinder/userfiles/files/86724631953.pdfIn PDF document text
    • https://www.vigo.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1607544936b0b8---71996350483.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=holes+chapter+30+questions+and+answersPDF link annotation

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