Malicious PDF — malware analysis report

Static analysis result for SHA-256 aafff7410312458c…

MALICIOUS

PDF

292.7 KB Created: 2021-08-04 22:11:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: 46135c0fae28e1ee129023c37dbff28d SHA-1: 3a967433079250f07025d2b6f506ef4acf4cc9b0 SHA-256: aafff7410312458c8d240c024da0ff03061256d64de8a2c79f9d7709734924dc
134 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 and contains embedded JavaScript. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9770

Heuristics 6

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://alteanetworks.fr/img/file/bajon.pdf In PDF document text
    • http://lso-msm.fr/userfiles/file/83819360482.pdfIn PDF document text
    • http://e-skala.pl/userfiles/file/29182590187.pdfIn PDF document text
    • https://habibitours.org/ckfinder/userfiles/files/pavugake.pdfIn PDF document text
    • http://www.findvoters.com/userfiles/file/nativezobariduwesataz.pdfIn PDF document text
    • https://tapetcenter.ro/app/webroot/files/userfiles/files/tafaxuva.pdfIn PDF document text
    • https://www.gasserbush.com/wp-content/plugins/super-forms/uploads/php/files/c1f91a5bca33b25d2ce7866ea47173f7/81308384345.pdfIn PDF document text
    • http://www.putnamtaxi.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607a77678f986---39369785131.pdfIn PDF document text
    • http://hourinkan.net/js/upload/files/nuketebupupobamepe.pdfIn PDF document text
    • https://www.helpfulhunks.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607e7149daccc---73104662382.pdfIn PDF document text
    • http://plnjl.com/userfiles/files/77071657658.pdfIn PDF document text
    • https://www.pharmaright.ca/wp-content/plugins/super-forms/uploads/php/files/tnra7h166mjrspbi1ha7pn1oq0/5250334861.pdfIn PDF document text
    • https://my-natural-style.net/upload/files/38235956337.pdfIn PDF document text
    • http://iehyun.com/editorupload/file/pififebuvivelul.pdfIn PDF document text
    • https://gauravkankariya.com/wp-content/plugins/super-forms/uploads/php/files/elq5gva4hrllsabkos89v2ljc1/35686478494.pdfIn PDF document text
    • http://nesthomes.in/userfiles/file/91499004595.pdfIn PDF document text
    • http://www.deadclan.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c3cfbaca493---piwatupejosixox.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099c645a6e91---pamimuragusulekeg.pdfIn PDF document text
    • http://alpanelektrik.com/depo/sayfaresim/file/52753982813.pdfIn PDF document text
    • http://ecole.ru/text/images/file/87403874088.pdfIn PDF document text
    • http://www.monts.sk/upload_images/file/45852193348.pdfIn PDF document text
    • http://nbnjl.com/userfiles/files/vevizun.pdfIn PDF document text
    • https://mithermomix.com.mx/wp-content/plugins/super-forms/uploads/php/files/ddad8b72555ff8fe00692d5ccf455005/jisalokugopid.pdfIn PDF document text
    • https://40parables.com/wp-content/plugins/super-forms/uploads/php/files/983be01713c5ac1f99f8bf2d7ecdaa66/fulizelusexegamegam.pdfIn PDF document text
    • https://www.a2zmedical.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160b668de995a4---tesufi.pdfIn PDF document text
    • https://www.vibrationmonitoring.asia/wp-content/plugins/formcraft/file-upload/server/content/files/1608e2f192a672---nalazegurivatexugirev.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=how+to+do+curls+at+homePDF 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_off000425c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x425C6 17608 bytes
SHA-256: 4913fe10aeada052500f7e9dbe666911a83e4b64a0a770e852acba2d1855489a
font_01_sfnt_off000453a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x453A3 10616 bytes
SHA-256: 579ccd496c092bff332a65f0ba16e65f358f8b61e24a0bf006314ee4483ec494
font_02_sfnt_off00046bfe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x46BFE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.