Malicious PDF — malware analysis report

Static analysis result for SHA-256 70545a597923db5c…

MALICIOUS

PDF

70.3 KB Created: 2021-09-12 21:22:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 06927508cfebeb47d13dbe14800416a3 SHA-1: d4281ad1096d6bfe61a236bade84aacc237f1e1c SHA-256: 70545a597923db5c7920a237221d93e9e7704b2eb6366c1ca0846b2848ac3382
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or trojan threat. It contains numerous embedded URLs, with one heuristic specifically identifying it as a link farm on disposable hosting, suggesting an attempt to redirect users to malicious content. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8571

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://kotrackusa.com/fckedit_file/file///20210908_3_35_9.pdf In PDF document text
    • http://pescepiana.eu/userfiles/files/60835394064.pdfIn PDF document text
    • http://harringtonandlombardi.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/xoxerej.pdfIn PDF document text
    • http://pro-roubenky.cz/UserFiles/File/paxikusizelimovo.pdfIn PDF document text
    • https://nepalmicrofinancesummit.org/userfiles/files/14354348106.pdfIn PDF document text
    • http://www.zaluziemalina.cz/userfiles/file/70766476950.pdfIn PDF document text
    • https://lingchuanfloor.com/app/webroot/userfiles/files/riwisamiwipadetiw.pdfIn PDF document text
    • http://armanetti.com/images/45009299748.pdfIn PDF document text
    • http://furniture83.com/upload/files/96113014304.pdfIn PDF document text
    • http://levne-pohary.cz/UserFiles/File/minigidupasunuxerukezi.pdfIn PDF document text
    • http://melodylavernebettencourt.com/media/file/kotedukipon.pdfIn PDF document text
    • http://daegyung.kr/userfiles/file/20210903093050.pdfIn PDF document text
    • http://mellorymotors.ru/admin/ckfinder/userfiles/files/purofofenoz.pdfIn PDF document text
    • https://conrays.ru/f/data/zepav.pdfIn PDF document text
    • https://cleanenergy.mn/uploads/files/90240358379.pdfIn PDF document text
    • http://iowatriallawyer.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/najenaxef.pdfIn PDF document text
    • https://botroul.be/uploads/58388777281.pdfIn PDF document text
    • https://svenjakretschmer.com/ckfinder/userfiles/files/zodoserolelisi.pdfIn PDF document text
    • http://muszempilla.com/files/file/lusorodujubedaremojiz.pdfIn PDF document text
    • http://ark-mr.com/data/home/qxu2063190031/htdocs/uploadfile/files/tuperekuworuxozawatasa.pdfIn PDF document text
    • http://quatangsongvan.com/hinhanh_fckeditor/file/vufiguwutomojug.pdfIn PDF document text
    • http://czechdidgeridoo.com/admin/upload/file/rutulolekopupires.pdfIn PDF document text
    • https://www.enviedecrire.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613df649120d5---wujaw.pdfIn PDF document text
    • http://www.rosabrockenhaus.ch/ckfinder/userfiles/files/90395727687.pdfIn PDF document text
    • http://chiesamadremarsala.eu/userfiles/files/6722786825.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=android+move+data+to+sd+cardPDF 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_off0000db6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB6A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f37c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF37C 17436 bytes
SHA-256: 4005eb0980c228177921bdde9afbc7f8a88c79d43f578ba0e99c9d9ec6843005

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