Malicious PDF — malware analysis report

Static analysis result for SHA-256 198b261ea163cc24…

MALICIOUS

PDF

105.6 KB Created: 2021-07-25 04:33:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 60b77933f41dac9463ade8ccfa06cdde SHA-1: d49092438a7c1ebc0d4c57cf193517eea0f269c2 SHA-256: 198b261ea163cc245d306ca47e2dfd79f678a23b37740e4aa7984ab5fd776d5d
124 Risk Score

Malware Insights

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

The PDF file contains numerous links pointing to compromised WordPress upload directories, indicating a link farm designed to redirect users to malicious content. ClamAV detection as 'Pdf.Phishing.Trojan' further supports its malicious nature. The document body is heavily obfuscated and unreadable, but the presence of multiple links to potentially malicious sites suggests a phishing or credential harvesting attempt.

Machine Learning

  • Nyx PDF Classifier clean score 0.0283

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 http://www.adanakursmerkezi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160af7e009f482---86822199747.pdf In PDF document text
    • https://avenirpourtous.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160c78e957dcc2---11600285.pdfIn PDF document text
    • http://learnersdigest.org/userfiles/file/64589106975.pdfIn PDF document text
    • http://dirabrealtors.com/wp-content/plugins/formcraft/file-upload/server/content/files/160abdfa1518e5---66585591472.pdfIn PDF document text
    • http://kuehllawpc.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/45019180002.pdfIn PDF document text
    • https://www.gasserbush.com/wp-content/plugins/super-forms/uploads/php/files/7c3a6a9e1d2e3253df20edb44e90ba01/vowuwopovorubiguxavo.pdfIn PDF document text
    • http://www.canadavisaservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d4a234aa17---49143339019.pdfIn PDF document text
    • https://aldurra.ly/images-editeur/img/file/vavekekozuxev.pdfIn PDF document text
    • https://pluckywize.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae7f7776dd0---93987008334.pdfIn PDF document text
    • http://mesotects.com/wp-content/plugins/formcraft/file-upload/server/content/files/160adf66f083f8---wukunasu.pdfIn PDF document text
    • http://vogiantinhmach.com/media/ftp/file/40037880987.pdfIn PDF document text
    • https://businesslife.com/content/file/safapenokofosuzoj.pdfIn PDF document text
    • https://hartwellcook.com/wp-content/plugins/super-forms/uploads/php/files/93ad961349b62b2b31652afcc22783f6/najenopatiso.pdfIn PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084c29c82b1e.pdfIn PDF document text
    • http://soft-pro.hr/upload/datoteke/69976024186.pdfIn PDF document text
    • https://dtcprojects.com.au/wp-content/plugins/super-forms/uploads/php/files/557ocm2301retir18lfs3uslho/fipozofupodutekivobeva.pdfIn PDF document text
    • https://ksuskalology.com/images/file/7414811187.pdfIn PDF document text
    • https://lazerom.pro/media/file/fasiwup.pdfIn PDF document text
    • http://lhs75aa.org/clients/0/08/08eb77d093c5251d787cf05842b4a73c/File/tewupubiwasexivukiv.pdfIn PDF document text
    • http://ttlengenharia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b3005934959---silutobumavuwogijosov.pdfIn PDF document text
    • https://sgdivorcelawyers.com/wp-content/plugins/super-forms/uploads/php/files/0e280ccf30c3afcde2c9bfe542701d74/lawukuposutesupinabidovo.pdfIn PDF document text
    • http://clinicaveterinariagoitese.it/userfiles/files/lavifo.pdfIn PDF document text
    • http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/82120088b6ec0ec59ba6dc99ea30b11e/74825600076.pdfIn PDF document text
    • https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f1247413d15---24665613764.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=how+to+perform+istikhara+step+by+step+in+hindiPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00012c78.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x12C78 26212 bytes
SHA-256: e426594e28e30004c1edf8ad17bf4f5fd24144ecbdf59062e0f5fdfd792b5268
font_00_sfnt_off00011467.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11467 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00015b0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15B0B 11140 bytes
SHA-256: 0a95f0439dd35827be7359868221637ca32ede888c1aee0fad7c5d80b33ab5b9
font_03_sfnt_off000174b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x174B7 17152 bytes
SHA-256: 80e39f1c75b8ac0d0f64a9ec63b4b29062d15fbf148a4f28bd7fd1527a6ca058

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