Malicious PDF — malware analysis report

Static analysis result for SHA-256 6868b87418718bc9…

MALICIOUS

PDF

60.1 KB Created: 2021-08-24 07:26:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21
MD5: 955ce066ba48ff2b10bbbe66eef92632 SHA-1: af73f0e4b3f6f91d9e597202fbf0f2757ea84362 SHA-256: 6868b87418718bc99001fcd33d891bb2331af4f263e529a1a8ff924654268906
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous links to compromised WordPress sites and other domains, suggesting it functions as a link farm to distribute malicious content. The presence of external URIs and link farm heuristics indicates a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9034

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 https://laborke.ru/uplcv?utm_term=tamil+sweet+melody+ringtone+free+download PDF link annotation
    • http://angelojrobles.com/admin_initial_test/userfiles/file/15661995863.pdfIn PDF document text
    • https://marblobath.com/app/webroot/img/files/ribazamatur.pdfIn PDF document text
    • http://chagatea.ru/wp-content/plugins/super-forms/uploads/php/files/366871e2acf1e40d9d07b6c44f942a0e/78674388558.pdfIn PDF document text
    • http://brodart01.com/wp-content/plugins/super-forms/uploads/php/files/sb0ljcrh7dcjjfrolghkr19ot8/80138051040.pdfIn PDF document text
    • https://www.fmworks.com.tr/wp-content/plugins/super-forms/uploads/php/files/oq9ipos442eh75hu4vsbkbf1l8/48303171871.pdfIn PDF document text
    • https://readxyz.org/wp-content/plugins/super-forms/uploads/php/files/fe88026e77cdbff37356c43f0bbd40ae/mukiwokewibagun.pdfIn PDF document text
    • https://www.die-umzugsfabrik.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089b63e9ca07---30267727257.pdfIn PDF document text
    • https://www.officinadelgustoroma.com/wp-content/plugins/super-forms/uploads/php/files/a4b41a157ef8130bc94cbe48e966fd42/tepawijezemesapoxefe.pdfIn PDF document text
    • http://rickgrisolia.com/userfiles/files/95832456152.pdfIn PDF document text
    • https://glowskincare.net/wp-content/plugins/super-forms/uploads/php/files/a13aec166a2ab3c7223bfff9137ff71d/30804935635.pdfIn PDF document text
    • https://zegaoyun.com/calisma2/files/uploads/rorakokovakojewagepoleb.pdfIn PDF document text
    • https://gsm.company/ckfinder/userfiles/files/xivofofobiga.pdfIn PDF document text
    • https://avenirpourtous.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160a2cb5007e83---vakunuzematu.pdfIn PDF document text
    • https://zoomkish.com/basefile/zoomkishcom/files/rifuz.pdfIn PDF document text
    • http://bakerfamreunion.com/clients/1/13/13be4b03bdabdd3a133c3ee64ed6201b/File/33293346039.pdfIn PDF document text
    • http://klick-tipp.at/ckfinder/userfiles/publics/files/baribananonif.pdfIn PDF document text
    • https://www.die-umzugsfabrik.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606efbd619205---46796804904.pdfIn PDF document text
    • http://global-gypsum.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609305f0ba0ae---41988790385.pdfIn PDF document text
    • https://www.potterycommercials.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160ae5e5b4ece3---83655042420.pdfIn PDF document text
    • https://asaptransfers.co.uk/wp-content/plugins/super-forms/uploads/php/files/cgto1765u6ugi89us5vbf15695/7637186200.pdfIn PDF document text
    • http://aldobini.it/userfiles/files/dovavarewi.pdfIn PDF document text
    • https://swotin.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089e8f2f24f5---lazalurafodubidazesozogib.pdfIn PDF document text
    • https://itchanoi.vn/uploads/news_file/gavipoparoli.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d163.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD163 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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