Malicious PDF — malware analysis report

Static analysis result for SHA-256 883633210ba38dc8…

MALICIOUS

PDF

54.7 KB Created: 2021-06-27 19:03:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: e90ee006476ea85dca06660401c9e6ac SHA-1: 92d9e46398c88b7e257a70bddbda2660c29a209f SHA-256: 883633210ba38dc841cee4ac11cd8d9090e8b9e0d069fded62850ae80a7c4051
154 Risk Score

Malware Insights

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

The PDF file contains numerous links pointing to various websites, many of which are hosted on compromised CMS platforms. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of using disposable hosting for link farms, suggesting an attempt to obscure malicious destinations. The ClamAV detection and ML classifier further support its malicious nature, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6190

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 https://www.geosuiteonline.de/wp-content/plugins/formcraft/file-upload/server/content/files/160d6dd69105f5---64060863738.pdf In PDF document text
    • http://abwlanham.com/uploads/files/lidekonavafexisuvoluvura.pdfIn PDF document text
    • http://sherwoodchambergolf.com/ckfinder/userfiles/files/37805048538.pdfIn PDF document text
    • http://magendans.com/imagefiles/file/xidonem.pdfIn PDF document text
    • http://activesolutionelectric.com/images/file/3621382422.pdfIn PDF document text
    • https://pankalconstructora.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad4f6b025f1---kigatigozixasupik.pdfIn PDF document text
    • https://alphacleanwashing.com/wp-content/plugins/super-forms/uploads/php/files/11e660da392998cd6a3035707a908247/34932747704.pdfIn PDF document text
    • https://perleyparish.org/wp-content/plugins/super-forms/uploads/php/files/372ce1ec88fd6e7149b379b7832d9e0e/pagetub.pdfIn PDF document text
    • https://ladychief.com/wp-content/plugins/super-forms/uploads/php/files/f5987c1f0a2c9eec7ac70204da4b433b/tebetivasijitejavat.pdfIn PDF document text
    • https://tocgia247.com/wp-content/plugins/super-forms/uploads/php/files/19qprcvcrv5lsghhlk7838eln7/94365397886.pdfIn PDF document text
    • http://www.bridalchapel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094b063444b1---91855907011.pdfIn PDF document text
    • http://antwerp-rentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608182f64cb38---nodijabepumunawamiwisi.pdfIn PDF document text
    • http://betaempire.com/uploads/userfiles/file/file/26639744938.pdfIn PDF document text
    • http://avtoarka.ru/wp-content/plugins/super-forms/uploads/php/files/8be41253c3716266019fa61861ff51e5/47886923313.pdfIn PDF document text
    • https://twr1115.net/files/fckeditor/file/xasobujidixugagenepubun.pdfIn PDF document text
    • http://mtcclassof81.com/clients/0/0a/0a45bd3013a8cc77df817aa526a911b1/File/89146474546.pdfIn PDF document text
    • https://admonks.ru/wp-content/plugins/super-forms/uploads/php/files/6b67bbf38c566e162bf174eb52a14422/55222032877.pdfIn PDF document text
    • https://master.plus/wp-content/plugins/super-forms/uploads/php/files/06133a95dae4b6dba18ce0ad96b7b44e/62867448633.pdfIn PDF document text
    • http://exactblue.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080e115cf8b8---bepal.pdfIn PDF document text
    • http://antik-cafe-bergen.de/wp-content/plugins/formcraft/file-upload/server/content/files/160d24d867fb61---59892200328.pdfIn PDF document text
    • https://tortugafilms.ca/adminfiles/file/zadudizizerudirevapuraf.pdfIn PDF document text
    • https://www.3dreamchurch.com/wp-content/plugins/super-forms/uploads/php/files/02f7b3272f5c5f33c4d789be0d15bcc6/62847601061.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=ms+office+for+windows+xpPDF link annotation

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