Malicious PDF — malware analysis report

Static analysis result for SHA-256 6bac870b8f98dad6…

MALICIOUS

PDF

48.0 KB Created: 2021-09-02 02:01:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 551830d598120ed591f3d0271b177ddd SHA-1: 72f6c63681f16feb4515a625b51e0609e84e7ecd SHA-256: 6bac870b8f98dad60fb0d2e549f7a882ba1f7eb49de63d52349ff5b7a7823ddb
154 Risk Score

Malware Insights

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

The sample is a PDF that contains a link farm, with multiple URLs pointing to potentially compromised websites or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The presence of numerous links to external resources suggests an attempt to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8568

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://marymo.ru/uploads/files/gubonofimisipomibufen.pdf In PDF document text
    • http://resheto.ru/users_images//fck/file/xovetudojusedabafatidod.pdfIn PDF document text
    • https://howardsteeves.com/wp-content/plugins/super-forms/uploads/php/files/18aa7e40392f85fd9c8bd44a49670d7b/439527946.pdfIn PDF document text
    • http://dinskayarealty.ru/media/file/jujajorotedufuf.pdfIn PDF document text
    • https://greenturtleproductions.com.au/wp-content/plugins/super-forms/uploads/php/files/63bf04488c31e007dafcbc59e6f74a73/fisuvajumuwufixomobovile.pdfIn PDF document text
    • https://benhgout.net/uploads/Files/file/lilezoraropowinog.pdfIn PDF document text
    • http://www.eflox.net/wp-content/plugins/formcraft/file-upload/server/content/files/16087f97be4a90---riwiriv.pdfIn PDF document text
    • https://immo-macedo.lu/userfiles/files/52224171471.pdfIn PDF document text
    • http://zge-led.com/luodan/images/userfiles/file/puzugodugodize.pdfIn PDF document text
    • http://preserveproperties.com/userfiles/files/zuvogojufeki.pdfIn PDF document text
    • https://djhelaly.com/wp-content/plugins/super-forms/uploads/php/files/934ea1feaab0e709cc497712fa3d43a5/71544294647.pdfIn PDF document text
    • https://insolite.lu/img/userfiles/files/40883585204.pdfIn PDF document text
    • http://bortran.com/upload/image/file/20210727094741.pdfIn PDF document text
    • http://designpavelzapletal.cz/files/file/13022240455.pdfIn PDF document text
    • https://euroroma-bg.org/files/file/42306671625.pdfIn PDF document text
    • https://nguyenhungstone.com/uploads/image/files/xolulepusisumizipuwezesu.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/160c5f99e9f8f8---jomiwepedotowepebelos.pdfIn PDF document text
    • https://www.pessin-location.fr/ckfinder/userfiles/files/popujon.pdfIn PDF document text
    • http://zetrade.cz/userfiles/file/jisomogulimawituni.pdfIn PDF document text
    • https://readxyz.org/wp-content/plugins/super-forms/uploads/php/files/6112786b0d668a61803af29891fd37d8/bezozubuk.pdfIn PDF document text
    • http://anhuizpyy.com/upload_fck/file/2021-5-6/20210506230248717963.pdfIn PDF document text
    • https://kodeac.com/wp-content/plugins/super-forms/uploads/php/files/674n3aq3n3j94g3g3jsli4ftj0/31336795170.pdfIn PDF document text
    • http://stressmanagement-karriere.de/userfiles/file/vukitogusiwavikezili.pdfIn PDF document text
    • https://carstenrath.com/wp-content/plugins/super-forms/uploads/php/files/cup1sqj8svhdbvunue844f3cnl/24949870895.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=the+mangoes+problem+answerPDF link annotation

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