Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a6869b236e645d6…

MALICIOUS

PDF

79.7 KB Created: 2021-07-26 07:47:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: b046f588278a9f39cd302b0092a401c6 SHA-1: 07cde35ccaa72a53fb2b2a5e45c2ebe87f11af71 SHA-256: 7a6869b236e645d6d4e13a47d0e9db41377e0bfadd67c1db141cdecdb40ca21a
132 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains an embedded JavaScript stream and numerous external URIs, many of which point to compromised upload storage or disposable hosting. The ClamAV detection as 'Pdf.Phishing.Trojan' strongly suggests malicious intent, likely to redirect users to phishing sites or download further malware. The presence of JavaScript indicates an attempt to execute code within the PDF viewer.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4740

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.
  • 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.
  • 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
  • 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://shipagents.nl/uploadfiles/file/gofovixovuj.pdf In PDF document text
    • http://garage-ys.info/js/upload/files/kalokezuxapusi.pdfIn PDF document text
    • https://naucharts.com/ckfinder/userfiles/files/dimavegokoriworidojus.pdfIn PDF document text
    • https://shopexpert.com/app/webroot/files/userfiles/files/vapetiv.pdfIn PDF document text
    • http://veterky.ru/ckfinder/userfiles/files/66552774470.pdfIn PDF document text
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/b039glssdtkctu8l7apdp3jhit/fexusitupuvufenadejet.pdfIn PDF document text
    • http://mirandatutoringcentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16095234090fa2---42992220430.pdfIn PDF document text
    • http://fashioneducation.ru/userfiles/file/67271448245.pdfIn PDF document text
    • https://www.novet.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a6e9edd3621---pifolis.pdfIn PDF document text
    • https://distriparkbotlek.nl/userfiles/files/kejoxapifuzekadafot.pdfIn PDF document text
    • http://banlinhkienlaptop.com/userfiles/file/85087328767.pdfIn PDF document text
    • https://gangwontaxi.com/FileData/ckfinder/files/20210705_3D9F0C7D79518F95.pdfIn PDF document text
    • http://www.dfdtrading.sk/ckfinder/userfiles/files/53604874564.pdfIn PDF document text
    • https://albawadiroad.com/userfiles/files/62453954922.pdfIn PDF document text
    • http://tweedehandswikkelaar.nl/app/webroot/files/userfiles/files/vajukidudaxu.pdfIn PDF document text
    • http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/0242dte0emug99j3of665g50u1/nuvujumosobojozisut.pdfIn PDF document text
    • http://pathtojanna.com/userfiles/files/99915854353.pdfIn PDF document text
    • http://www.optionassurance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607193d9671dc---64656929822.pdfIn PDF document text
    • https://g-ortho.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b2898d9875b---61338871009.pdfIn PDF document text
    • https://unserbiokorb.ch/userfiles/file/gonalobuwoto.pdfIn PDF document text
    • http://janjoling.com/public/ckfinder/userfiles/files/semadijas.pdfIn PDF document text
    • http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/c928d032436a2a514d52550455186185/rapuvajagubidevigelepevo.pdfIn PDF document text
    • https://kassa-evotor.ru/wp-content/plugins/super-forms/uploads/php/files/oekog0kab83thgfu72p5pa1tlh/gubujezigoragipud.pdfIn PDF document text
    • https://aquafilling.com/userfiles/file/misiruxonajazu.pdfIn PDF document text
    • https://www.siemers-deutschmann.de/wp-content/plugins/super-forms/uploads/php/files/fcpcom3odod7of4a8sd3ssf106/netuw.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=snap+fitness+membership+cancellation+formPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f25d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF25D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010a74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A74 10960 bytes
SHA-256: 2e45e7fcf8746c179d88488715572a60211d1a8394a9a4358467f8a6a5cf756d