Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c49e4b91febfe5d…

MALICIOUS

PDF

69.3 KB Created: 2021-09-03 22:07:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 11b292de58f213c0e573f8441d5134be SHA-1: 372e2cdb88f2d22f3905095a314e1f26dfa9ad85 SHA-256: 6c49e4b91febfe5d0d7922c3a5260644c6bcc8368abe4aedd4f511f655551d6b
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a link farm with numerous URLs pointing to compromised WordPress sites, indicating a phishing or malware distribution attempt. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports its malicious nature. The file's structure and numerous external links suggest it's designed to lure users to malicious content.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4905

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/a1c42cb0ed10f3b65cf3fa3451bd5f3a/ruleb.pdf In PDF document text
    • https://kalatranslation.co.uk/wp-content/plugins/super-forms/uploads/php/files/mc31j5jp2am0vs2bdhsnrnq44q/bixabikokuside.pdfIn PDF document text
    • https://bor-diing.com/upload/files/lafusefakoragovejeledu.pdfIn PDF document text
    • http://www.grundys.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1609476ac641e0---96627968732.pdfIn PDF document text
    • https://termofriz.rs//files/78064924565.pdfIn PDF document text
    • https://tresonance.org/uploadfiles/poreramiv.pdfIn PDF document text
    • http://altaprecision.com/userfiles/file/47627499276.pdfIn PDF document text
    • https://1sis.com/wp-content/plugins/formcraft/file-upload/server/content/files/160772f4c88a63---28443586910.pdfIn PDF document text
    • https://saftanton.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1608ef666c9a3a---16914090884.pdfIn PDF document text
    • http://halvani.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608bfea5d9f29---ditipexunesososulek.pdfIn PDF document text
    • https://deepex.hu/hirek/files/xogofusivi.pdfIn PDF document text
    • http://dungcucaytrong.com/images/files/lewigagubarajowoma.pdfIn PDF document text
    • https://dmddsgn.com/wp-content/plugins/super-forms/uploads/php/files/ed504e93bce73715a336420808423079/fafatonuvusudelilutibigod.pdfIn PDF document text
    • http://www.allatpatikapecs.hu/images/file/mobimumifa.pdfIn PDF document text
    • https://latework.cz/soubory/wugawovopetexutapaj.pdfIn PDF document text
    • http://mateuszkucharski.pl/admin/file/xajoriwusagedewakifor.pdfIn PDF document text
    • http://inspirationallabels.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160bd91291a546---pisojapodiwalerebixemusa.pdfIn PDF document text
    • https://duext.com/wp-content/plugins/super-forms/uploads/php/files/4699f85af2b952679e3231ade95197af/nunijerasulogekor.pdfIn PDF document text
    • https://kingwaterpure.com/ckfinder/userfiles/files/gotowimuk.pdfIn PDF document text
    • https://ecoinkworld.com/wp-content/plugins/super-forms/uploads/php/files/24b665fa253d1d88a5bf8530bb22573e/nofelofoloxokutodadejamov.pdfIn PDF document text
    • http://motivationandmomentum.net/ci/userfiles/files/zunuta.pdfIn PDF document text
    • http://absolutelyneon.com/userfiles/file/sisodevisegemuni.pdfIn PDF document text
    • https://evocative.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16129cb2fb5299---zerale.pdfIn PDF document text
    • https://sygimportaciones.com/wp-content/plugins/super-forms/uploads/php/files/meqb5l47nnihaqojcbrf5go3jo/nevabugevefoxomoxekugawi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=report+card+comments+for+students+pdfPDF 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_off0000be81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE81 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d693.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD693 15944 bytes
SHA-256: f5b5af835de564a649c3b1c96dfc999c4fa9ed8c25467629ea601467ef4a15cc
font_02_sfnt_off0000ff76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF76 10788 bytes
SHA-256: 235c22133e6c2c016ac6ff28c139aea0f013c2e1d79a192970380e1dd317a012