Malicious PDF — malware analysis report

Static analysis result for SHA-256 973b48f3306209b1…

MALICIOUS

PDF

71.7 KB Created: 2021-08-06 19:04:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 6c36f8b15500f3c954f0ecd7c4ac33e3 SHA-1: 279f9b98e2eeef50a3f7a2aad46152e8cafc70b1 SHA-256: 973b48f3306209b146941f586a7aecc47db3227a2591e0c8cc12fec3c02b26ab
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a link farm pointing to multiple compromised WordPress sites and disposable hosting domains, indicating an attempt to distribute malicious content or phish users. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports its malicious nature. No scripts were extracted, but the structure suggests it's designed to redirect users to potentially harmful external URLs.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4623

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 https://www.cibaospalaser.com/wp-content/plugins/super-forms/uploads/php/files/caj8c42j6k3i3qhg6555vajgvk/fopilaxib.pdf In PDF document text
    • https://majorsagilekvaros.hu/uploads/file/72324821069.pdfIn PDF document text
    • http://jinwoosmc.com/userfiles/file/dujaxanutujokakuluwimiga.pdfIn PDF document text
    • https://janeunchained.com/wp-content/plugins/super-forms/uploads/php/files/crd37abqv925ua0kghoo1evlha/jipenevolobiretatikum.pdfIn PDF document text
    • http://nuyewpilot.academy/wp-content/plugins/super-forms/uploads/php/files/aa72ae7cfbe98a8ea0169189a22fd24e/77175673067.pdfIn PDF document text
    • http://careerhack.net/wp-content/plugins/formcraft/file-upload/server/content/files/160d98c2b973fd---99769412525.pdfIn PDF document text
    • https://noblacklist.pro/web/img/podborky/files/1116991727.pdfIn PDF document text
    • http://csc-0898.com/userfiles/file/20210703173032_8j3gly.pdfIn PDF document text
    • http://3handseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab66efdf36d---55990932194.pdfIn PDF document text
    • http://pinturasoltra.com/images/slider/files/xusukikizefu.pdfIn PDF document text
    • http://architettorobertafasola.eu/userfiles/files/17607032125.pdfIn PDF document text
    • http://belgium-ex.com/images/blog//file/58427753820.pdfIn PDF document text
    • http://whs1963.com/clients/7/75/758a827d59fb1c2827eec60421ffdc22/File/26060117789.pdfIn PDF document text
    • http://pulsrmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c69442320ec---jabaxurawoligebawatevega.pdfIn PDF document text
    • http://ruresept.ru/files/file/91226107963.pdfIn PDF document text
    • http://naturallabs.de/userfiles/file/xejutowen.pdfIn PDF document text
    • http://constructionone.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160754716b4c6d---31135248610.pdfIn PDF document text
    • http://schouteninterieurwerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16086bcebc2b8b---74027608374.pdfIn PDF document text
    • http://ttworld.hu/uploads/content_files/files/rizoziwijupoduruwewufoti.pdfIn PDF document text
    • https://www.baptistenhardenberg.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608734fdbfa2e---ladugofima.pdfIn PDF document text
    • https://www.penyembuhanholistikreiki.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073f08cb8b46---fuzijetunuja.pdfIn PDF document text
    • https://ivfnna.gr/wp-content/plugins/super-forms/uploads/php/files/2467e6aaa1087bae28c8b6fe0e18e725/10377584640.pdfIn PDF document text
    • https://vinisfarm.com/wp-content/plugins/super-forms/uploads/php/files/a335e818d1259765d9f730df0c76d2c1/xinuwim.pdfIn PDF document text
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/dbofl249gvb9puk1k7v7rk0mm4/41561430706.pdfIn PDF document text
    • http://www.dkmodels.net/ckfinder/userfiles/files/63184737380.pdfIn PDF document text
    • https://mytutr.com/wp-content/plugins/super-forms/uploads/php/files/42e607a6a5f8da01e8d3615205d6724b/lejujuvofeluvesexa.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=dolphin+nautilus+cc+automatic+robotic+pool+cleaner+partsPDF 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_off0000efb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFB1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000107c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107C8 10880 bytes
SHA-256: bd7971b2bff1cde4e279c91910608a1dd157426a4b2bad4c68b22782d7f3c594