Malicious PDF — malware analysis report

Static analysis result for SHA-256 20971339e9847113…

MALICIOUS

PDF

79.0 KB Created: 2021-08-02 16:59:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 20adb1c7edfa20ac41cba0146bef7b1b SHA-1: f74158cc2a82a730e2180311985d8dafd92545f3 SHA-256: 20971339e98471136fda0b6b820b2a21c7e8ddb5cd71000ea09c27b7d7a42b36
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded URLs, many of which point to compromised WordPress sites and disposable hosting. This suggests a phishing or spam campaign aimed at driving traffic to malicious or compromised content. While no scripts were explicitly extracted, the PDF structure and URL patterns are indicative of malicious intent, likely to lure users to phishing sites or potentially download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5305

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://vivatbacchus.hu/files/file/beguwomozulitexutolevutig.pdf In PDF document text
    • http://appinaris.net/ckfinder/userfiles/publics/files/kigobeduxafufowozo.pdfIn PDF document text
    • http://signauction.net/userfiles/file/96673434669.pdfIn PDF document text
    • http://kk-gorenjska.si/uporabnik/file/semavuwarojaj.pdfIn PDF document text
    • https://www.scanworld.se/wp-content/plugins/formcraft/file-upload/server/content/files/16082f4e1c164f---78211787779.pdfIn PDF document text
    • http://nfraccon.org/userfiles/file/67489980696.pdfIn PDF document text
    • https://chief-moving.com/editor_upload/file/jokisusomivek.pdfIn PDF document text
    • https://ohligschlaeger-berger.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a3850db127e---vokew.pdfIn PDF document text
    • https://o2opr.co/userfiles/files/54719148311.pdfIn PDF document text
    • http://www.goataxiservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c98d6601012---meparumorufiru.pdfIn PDF document text
    • http://bukharaatlanta.com/sites/default/files/file/ruxodisog.pdfIn PDF document text
    • https://sharidendesignasphalt.com/wp-content/plugins/super-forms/uploads/php/files/74b91732b5bb1829b47379c1b8cdebc9/1074331166.pdfIn PDF document text
    • https://larrialdiak.es/files/galeria/files/8505661002.pdfIn PDF document text
    • http://dirabrealtors.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a67bf8903de---fexumepifajumazasijawu.pdfIn PDF document text
    • https://xn----7sbbjg7ctfs.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/9b9550c9c2ef9df4b1945f5fc66532ea/77747523109.pdfIn PDF document text
    • http://www.rolstoellift.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f95f353caa---rewakuwujelidowat.pdfIn PDF document text
    • https://oddluzanie.net/userfiles/file/bodofowetalimutar.pdfIn PDF document text
    • https://sv-fin.ru/wp-content/plugins/super-forms/uploads/php/files/3598aad5a7c136e55efd2b513040251d/kepafexuxitaxobobudap.pdfIn PDF document text
    • http://abwrosedale.com/uploads/files/5380647676.pdfIn PDF document text
    • http://webbuilders.com/files/file/rutelavijavusiregipofexo.pdfIn PDF document text
    • https://hssipm.com/wp-content/plugins/super-forms/uploads/php/files/d8e9a044d9f06bf030d3318f0a7ddbb3/55057114688.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e9f8dd5cf3---10669533962.pdfIn PDF document text
    • https://idfusionllc.com/wp-content/plugins/super-forms/uploads/php/files/a14cc004c8ba42460a89121b7065170a/degavo.pdfIn PDF document text
    • http://counterreaction.net/wp-content/plugins/formcraft/file-upload/server/content/files/160fb12145e821---zesaxenitazonamezomebuk.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=super+smash+bros+melee+iso+dolphin+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_off0000e12d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE12D 10960 bytes
SHA-256: 38a2f58d116b5d568c0882807c03cda062c16d6e37f14e1744f6fa192a013ffd
font_01_sfnt_off0000fa24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA24 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011236.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11236 17504 bytes
SHA-256: 22965ed2f3a492ae574989cb9a36e90fc0a42a301fadc0149fb4d6e2330797bd