Malicious PDF — malware analysis report

Static analysis result for SHA-256 77be2beb3193c792…

MALICIOUS

PDF

98.5 KB Created: 2021-07-29 23:09:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-04
MD5: 22e1808faf1bff6e99341638edd417c7 SHA-1: 00776b05462308cdc5ff59b4eb097bac33bd9f91 SHA-256: 77be2beb3193c7925d772f5f820da18f2b3cbf112642de65d370c2918ebc6723
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. 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 malicious score 0.9639

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://xn--80aaffebba2apgigwiiececnggk9e4k.xn--p1ai/pict/file/95329475134.pdf In PDF document text
    • https://cedarcreeksauce.com/wp-content/plugins/super-forms/uploads/php/files/d0a648610e4f3b2559ec6d57cbfdea99/bizabadonizutusalefu.pdfIn PDF document text
    • https://lerong.vn/wp-content/plugins/super-forms/uploads/php/files/e5d60df37d01d279f131d1620c9968b1/vilalavunisuropimexiwa.pdfIn PDF document text
    • http://luckdidea.com/ckfinder/images_store/files/popifuj.pdfIn PDF document text
    • https://techlan.pl/files/file/dibusuwupoxajovedumi.pdfIn PDF document text
    • https://elicopter-de-inchiriat.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1606d4272b1b02---91611117232.pdfIn PDF document text
    • https://kantankacreative.com/wp-content/plugins/super-forms/uploads/php/files/a92a0c5be955be19af358500f385737f/53628571676.pdfIn PDF document text
    • https://www.quatainvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16076a5702fba5---dimifodozufudafugewug.pdfIn PDF document text
    • http://zawayakw.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095cd74f0772---64599914003.pdfIn PDF document text
    • http://beulahcooleycollection.com/clients/870349/File/83568396829.pdfIn PDF document text
    • https://pindimana.in/uploads/file/nukozobumebumasiramusarig.pdfIn PDF document text
    • http://sarahscupcakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b00b556fba9---tugezupiligosifekixefopa.pdfIn PDF document text
    • https://rmissio.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160bf63ed6826e---vepofiza.pdfIn PDF document text
    • http://brukbet.com/user_images/file/84765931244.pdfIn PDF document text
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/jjbmas8vd8tm7aalt88uj2ag36/pijonufixubum.pdfIn PDF document text
    • https://myarchitect.es/ckfinder/userfiles/files/nonavipiralavokolemababov.pdfIn PDF document text
    • http://amphorabeautyclub.com/campannas/file/68342462678.pdfIn PDF document text
    • http://www.vitrierbxl.be/wp-content/plugins/formcraft/file-upload/server/content/files/1606cfa7e5618a---33635575522.pdfIn PDF document text
    • http://mountmedpharmacy.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160708cfa6d8a8---26128048429.pdfIn PDF document text
    • http://njuhome.pl/ckfinder/userfiles/files/tajejoranitidaredonifu.pdfIn PDF document text
    • https://forex-robo.org/wp-content/plugins/super-forms/uploads/php/files/11050a945af65bd6e514a2381bc19669/18625726593.pdfIn PDF document text
    • http://protech.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/160d9d57b7dbe2---xevuboneloz.pdfIn PDF document text
    • http://iamsong.vn/uploads/files/zibukobufomegipuvova.pdfIn PDF document text
    • https://janeunchained.com/wp-content/plugins/super-forms/uploads/php/files/gvir854m57ajdr0ncpvrmv4at1/54036169702.pdfIn PDF document text
    • https://djhelaly.com/wp-content/plugins/super-forms/uploads/php/files/ddd9cbdb75d695b95430878e0be85107/69007025968.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=michael+jackson+ft+lil+wayne+we+are+the+world+mp3+downloadPDF 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_off00012d84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D84 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001459b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1459B 11472 bytes
SHA-256: e68fa6e3dcdfcddee5d91c2ad7c202c9ee06c0c45f6802768fed68b1b3ea210c
font_02_sfnt_off0001609c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1609C 17884 bytes
SHA-256: 7c7a97dffa9a3f4db247775c5723065b680c14245997ba85885bab844a66853e

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