Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f106ecf863d821a…

MALICIOUS

PDF

71.3 KB Created: 2021-07-25 04:05:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 0676d80eb3a5dee4fe64e7406d7c88d0 SHA-1: 19b5ee24872321e548699a6c71472755ee1901c0 SHA-256: 7f106ecf863d821a98fa3b5bc2379da240021d9e64cf4a1d614f527a03513496
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link T1059.007 JavaScript

The PDF is identified as a phishing lure due to its image-heavy nature and small file size, typical of a screenshot designed to hide a clickable action. It contains numerous links pointing to compromised CMS upload directories, suggesting a chain of redirection to malicious content. While no scripts were explicitly extracted, the PDF structure and heuristic firings indicate it's designed to lead the user to external malicious resources, likely for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 71 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://unique-u.biz/images/uploads/file/63350535220.pdf In PDF document text
    • https://jiptv.nl/wp-content/plugins/super-forms/uploads/php/files/t859iqsuib6pm2itmm93nopdlu/lujawoxitozis.pdfIn PDF document text
    • https://extremetour74.ru/wp-content/plugins/super-forms/uploads/php/files/e2fe347c164d503209a3b1cf11b39f82/xinojinokafatugi.pdfIn PDF document text
    • http://conwaychristian.org/wp-content/plugins/formcraft/file-upload/server/content/files/16075a405761bd---tumogifupevor.pdfIn PDF document text
    • http://hattrick-sports.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076aceb863c3---govutexapusawadi.pdfIn PDF document text
    • https://www.travelticket.com.au/wp-content/plugins/super-forms/uploads/php/files/tn4phdv25ad5aeivit41lgi02c/debupubinoxid.pdfIn PDF document text
    • https://gtsonline.nl/wp-content/plugins/super-forms/uploads/php/files/pd4o6qc8na5d3bqduqhb9u8die/18501993112.pdfIn PDF document text
    • http://precedent.by/_newsite/images_from_html_editor/file/vujibarozikoguwopuwisibod.pdfIn PDF document text
    • https://sevsport.info/wp-content/plugins/super-forms/uploads/php/files/670211b2e127520c61e2ab3df38d8554/puxivaloxuwazaluzirut.pdfIn PDF document text
    • https://genesislighting.net/wp-content/plugins/super-forms/uploads/php/files/a23974bbfe30ea6f7adbf449fc5cd633/duditidodanojosaxekefujil.pdfIn PDF document text
    • https://loskutova.site/wp-content/plugins/super-forms/uploads/php/files/e27f12866bbc8e4624f0842fb14a238c/rezadinexipazurexituxobom.pdfIn PDF document text
    • http://terapie-psi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1608679528422c---vupamipabadeduxezasajopu.pdfIn PDF document text
    • https://www.sanier.pl/wp-content/plugins/super-forms/uploads/php/files/ipf6ue4is19uob9h9n1i3hpe2m/xumegedewivevituwemebi.pdfIn PDF document text
    • https://webtechnocrats.com/upload/file/fapunozefozafarutadivodip.pdfIn PDF document text
    • http://m2mus.ca/clients/b/b1/b1ca46fdb12d68e762e4a8b3318caec0/File/17387872555.pdfIn PDF document text
    • http://kapalishakti.com/ckfinder/userfiles/files/55254239671.pdfIn PDF document text
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/er0lj62a6g9be8cojd6mpm9tj3/wiwibizekavo.pdfIn PDF document text
    • http://bjoybrands.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f99c5bd638---80241831574.pdfIn PDF document text
    • http://arohitourandtravels.com/userfiles/file/mofamamojupiramediriwugop.pdfIn PDF document text
    • http://jamoncup.es/wp-content/plugins/formcraft/file-upload/server/content/files/160a1a3de705b1---dazugumojavof.pdfIn PDF document text
    • https://perleyparish.org/wp-content/plugins/super-forms/uploads/php/files/a5ea89a98a76c039e64865da8dcedad5/jetoliruzizano.pdfIn PDF document text
    • http://tmfconnected.com/clients/6/67/67cd703e63b47da0cba1438f70967d25/File/josuvoxeluzu.pdfIn PDF document text
    • http://www.lightingandhvacexpo.com/wp-content/plugins/super-forms/uploads/php/files/e318bfc45dfa14e3aafa405c9f0021e5/17411000040.pdfIn PDF document text
    • https://www.blackandwhite-salon.com/wp-content/plugins/super-forms/uploads/php/files/b58dc19e19dc57c9d09fc6a85635a440/43699859911.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=product+activation+key+omsi+bus+simulatorPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • 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_off0000bba9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBBA9 11044 bytes
SHA-256: bc8d1ed72a63c8cd690eeab0360db20debf8cfa0440eac8c221367954588b84e
font_01_sfnt_off0000d569.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD569 13428 bytes
SHA-256: b0876ec5fac211ccb7cd0a90edd206ac3a09b1fe7950776bbf70895bf27a28d7
font_02_sfnt_off0000f648.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF648 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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