Malicious PDF — malware analysis report

Static analysis result for SHA-256 94812190a310505d…

MALICIOUS

PDF

62.5 KB Created: 2021-09-20 06:22:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: 0484327a07c6a8d8de641a88dd6d7c44 SHA-1: 7e37c44685a6c03d45a3868c7aa161e08d848f14 SHA-256: 94812190a310505d1f53701a3fb5ecd6cb7bf1ee4faed01cb8825a70865fc652
154 Risk Score

Malware Insights

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

The sample is a PDF document identified as malicious by ML classifiers and ClamAV. It contains a link farm with numerous URLs pointing to various domains, many of which appear to be compromised or disposable hosting. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a tactic to use SEO to distribute links, likely for phishing or malware distribution. The presence of 'utm_term' parameters in some URLs suggests an attempt to track campaign effectiveness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5277

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://rotterdampools.com/contents/files/73947527459.pdf In PDF document text
    • http://lohoithaiduong.com/uploads/files/65545517276.pdfIn PDF document text
    • http://rivebistro.net/ckfinder/userfiles/files/10328840039.pdfIn PDF document text
    • http://datcat.vn/2018/file/21370950401.pdfIn PDF document text
    • http://ficfart.org/userfiles/file/sosifopulidepatego.pdfIn PDF document text
    • https://dedywiredja.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c0aef9708b---guwexuvafumotapejebififul.pdfIn PDF document text
    • https://braindevelopmentmaps.org/userfiles/files/zafirozurunapirebato.pdfIn PDF document text
    • https://rivieresoceanie.com/userfiles/file/21055495772.pdfIn PDF document text
    • https://www.capitalroofingct.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135a6b9a2051---34097005258.pdfIn PDF document text
    • http://westernmaki.com/uploads/files/domodofupekasuzin.pdfIn PDF document text
    • https://emmaushuis.org/pages/12708190405.pdfIn PDF document text
    • https://zoomkish.com/basefile/zoomkishcom/files/jupuzexususomaso.pdfIn PDF document text
    • http://unitekinfostructures.com/userfiles/file/zemelironeminozufufewoxux.pdfIn PDF document text
    • https://certifiedmoversinc.com/wp-content/plugins/super-forms/uploads/php/files/4f843cd2cccdaad412e7b595334ca105/nugupuluvow.pdfIn PDF document text
    • http://puntolinea.org/userfiles/files/dapupojexa.pdfIn PDF document text
    • https://ww150006.linebot.net/upfile/files/20210902223306.pdfIn PDF document text
    • http://miskolciharsona.hu/pictures/file/22072303057.pdfIn PDF document text
    • http://ajarnveerapong.com/UserFiles/file/bidixilipitiv.pdfIn PDF document text
    • http://www.feniuniversity.edu.bd/app/webroot/ckfinder/userfiles/files/34673824269.pdfIn PDF document text
    • http://chuanghuilaw.com/filespath/files/20210910100914.pdfIn PDF document text
    • https://moniimpex.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137ee90eb52f---lopidebinetixo.pdfIn PDF document text
    • http://controldellaves.com/app/webroot/arxius/file/lelazifejupaliwunokomewi.pdfIn PDF document text
    • http://koopmankennedyfeller.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/pevova.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=asphalt+nitro+unlimited+money+and+tokensPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b163.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB163 14868 bytes
SHA-256: 38fadf4b5f8e455dbd103e31b1cc6a5bedc4b9e0fa51fd436693e28abd0af620
font_01_sfnt_off0000d6c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6C3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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