Malicious PDF — malware analysis report

Static analysis result for SHA-256 83142aa2aaf16e89…

MALICIOUS

PDF

85.9 KB Created: 2021-06-29 03:31:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-23
MD5: 0256d8c9c2e501a3bfbf44ee7cf37fd9 SHA-1: da48885ba5708b7b693b246f03fcd11f03ed98b9 SHA-256: 83142aa2aaf16e8964f59bba5e8865cf49efdcf1e3b8dd53f28cd161ddbb4066
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4274

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://msci.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/1608a94cd7f8ec---seloxekiwuve.pdf In PDF document text
    • http://abapaposentados.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160bbc887051ca---73347687839.pdfIn PDF document text
    • http://lotuscourtpune.com/wp-content/plugins/super-forms/uploads/php/files/gdg933pln3nnih8u4fi68l6fe4/sefulebuliwesufufer.pdfIn PDF document text
    • https://panificiopasticceriabattaglia.it/file/xawaneluvawipemivaxade.pdfIn PDF document text
    • https://www.marvistasales.com/wp-content/plugins/super-forms/uploads/php/files/e9d8b62ec5387982f6e13f1faa1c18cc/fifivemafugaderatowe.pdfIn PDF document text
    • https://suhrsmad.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160c46a99ce959---nekulogokowenik.pdfIn PDF document text
    • http://files.ibiza-ferien.de/file/86740126812.pdfIn PDF document text
    • http://fabrykakonwersji.pl/wp-content/plugins/super-forms/uploads/php/files/8d5394650dbfa5235fbfecdd7931a146/rekemiwime.pdfIn PDF document text
    • https://www.siemers-deutschmann.de/wp-content/plugins/super-forms/uploads/php/files/6bcm6ui5ddfjv7g1amb2sstcqd/58357087209.pdfIn PDF document text
    • https://hpsoft.shop/upload/files/39923843078.pdfIn PDF document text
    • https://gservicepz.com/wp-content/plugins/super-forms/uploads/php/files/b6889b66ba75174c2fdef58828c52418/rirafunumukut.pdfIn PDF document text
    • https://antoinepanau.com/wp-content/plugins/super-forms/uploads/php/files/d99b9fa2e6d7a3cfe50b43fcb14aa912/wifuvesejovujepaguzo.pdfIn PDF document text
    • http://www.atrium-tuiles.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608336e3930dc---16471761613.pdfIn PDF document text
    • http://es-umzuege-transporte.de/wp-content/plugins/super-forms/uploads/php/files/602c49ec35344e7ac1ff978d5a0c1541/28313386519.pdfIn PDF document text
    • https://www.kadinlarsitesi.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609cdcd926f92---rolinox.pdfIn PDF document text
    • http://mattstergamer.com/wp-content/plugins/super-forms/uploads/php/files/njn91jg3bk0a5fd6m7uq5mlgik/dodurirakubirosanumizatu.pdfIn PDF document text
    • http://www.aadhar-interior.com/userfiles/file/zopumojubade.pdfIn PDF document text
    • http://www.wallisandemmanuel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083ccb9cfae3---jodisuromojozevipusasip.pdfIn PDF document text
    • https://izharfoster.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b02426c0246---24706604867.pdfIn PDF document text
    • https://www.waterlooarmsnewforest.co.uk/wp-content/plugins/super-forms/uploads/php/files/b20e4c8631eb33020f3cdea0431d90b0/87683157218.pdfIn PDF document text
    • http://pekingtogo.com/uploads/files/58988648742.pdfIn PDF document text
    • http://autowagon.it/userfiles/files/15321436830.pdfIn PDF document text
    • http://aven.su/userfiles/file/zudajokavigupeloketewiluz.pdfIn PDF document text
    • https://amesmedicalservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c5e277e177b---7263925214.pdfIn PDF document text
    • http://446888.top/userfiles/file/37171294624.pdfIn PDF document text
    • https://cutandcolorparrucchieri.it/file/88489537472.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=owo+bot+support+serverPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e842.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE842 18748 bytes
SHA-256: 91f2fb786bc41dc39f7ef06b183d2ae5d8d74dea2b0cd00f3554b4174b330287
font_01_sfnt_off00011917.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11917 17176 bytes
SHA-256: 42d0f53a20f3d1c9945d4901e926a1b67774a3434ffd247576007d30177a54ef
font_02_sfnt_off00013269.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13269 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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