Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c8ad8e0d02a903a…

MALICIOUS

PDF

112.5 KB Created: 2021-07-16 04:02:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 9762d865ae09ef02f44254e33e0ed314 SHA-1: 7e71d1055cdea5b413fbc730b2928a8afbeb0a2c SHA-256: 7c8ad8e0d02a903a6b8197888ccef6e71d663ffe614b6b575229f86f1aa3fc65
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links pointing to compromised WordPress sites, suggesting it's part of a phishing or malicious redirection campaign. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to lure users to download further malware or engage in credential harvesting. The document's structure as a link farm on compromised CMS uploads is a common tactic for distributing malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9886

Heuristics 7

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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 http://www.mtpartnersfl.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b99d8cd49d7---manibedisobebizaletiro.pdf In PDF document text
    • http://roocenter.ru/upload/file/6891529890.pdfIn PDF document text
    • https://www.eecpowerindia.com/codelibrary/ckeditor/ckfinder/userfiles/files/11369068303.pdfIn PDF document text
    • https://www.straightmyteeth.com/wp-content/plugins/super-forms/uploads/php/files/56db701813e6a03b45459e91d6907466/92314124800.pdfIn PDF document text
    • https://nationalcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa80a78147a---namowigidezeg.pdfIn PDF document text
    • https://www.cocochan.com.pk/wp-content/plugins/super-forms/uploads/php/files/748c762ba1202e954c860ab50e8c93bf/71009772964.pdfIn PDF document text
    • http://www.gunyagder.org.tr/wp-content/plugins/super-forms/uploads/php/files/l1290i003343sfrqono6sn5ed2/tojazipe.pdfIn PDF document text
    • https://alphacleanwashing.com/wp-content/plugins/super-forms/uploads/php/files/1945577ae2f2a117b6b410b42d8f9e0f/dilupaxolon.pdfIn PDF document text
    • https://event-connections.net/wp-content/plugins/formcraft/file-upload/server/content/files/160ac96aad5398---2043923369.pdfIn PDF document text
    • http://alumcity.ru/userfiles/file/noguvotolimixinaxik.pdfIn PDF document text
    • https://expeditions-travel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160975c50d5eb2---filome.pdfIn PDF document text
    • https://sharidendesignasphalt.com/wp-content/plugins/super-forms/uploads/php/files/d75ca7cd1637596043d60f30c3d86716/97909853085.pdfIn PDF document text
    • https://cuacuonbentre.com/upload/files/54970547673.pdfIn PDF document text
    • https://samiznojmo.cz/wp-content/plugins/super-forms/uploads/php/files/93a9ff49d941b7608820b03256a9aa16/sobaf.pdfIn PDF document text
    • https://www.3dreamchurch.com/wp-content/plugins/super-forms/uploads/php/files/6eb56f67e16fd7be0742c933d5ae0aba/71878339038.pdfIn PDF document text
    • http://animalscipublisher.com/files/upfiles/file/45290845634.pdfIn PDF document text
    • https://linhquan-group.com/upload/ck/files/37293681535.pdfIn PDF document text
    • https://www.qlsny.com/wp-content/plugins/super-forms/uploads/php/files/353f90a296b450814c64926c4f6588c9/42388248296.pdfIn PDF document text
    • https://socialchangefactory.org/wp-content/plugins/super-forms/uploads/php/files/acfe4de8c438e0e330eacdce522ff21d/85363182503.pdfIn PDF document text
    • https://www.gasserbush.com/wp-content/plugins/super-forms/uploads/php/files/a5df34d41a90f62a383a25e622d73b7f/88077755140.pdfIn PDF document text
    • http://zulassungsservice4you.de/bilder/file/76547083583.pdfIn PDF document text
    • http://www.alfainstal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160940d8e6e999---voxurugo.pdfIn PDF document text
    • https://costumeworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8052223953---xakoveme.pdfIn PDF document text
    • https://cradlegold.com/wp-content/plugins/super-forms/uploads/php/files/0a04vpqji8d7h541eahqcd8uf6/70070867621.pdfIn PDF document text
    • https://jhservice.net/imagenes/galeria/files/nabegamafudugapu.pdfIn PDF document text
    • http://drukarnia-skawina.pl/app/webroot/media/files/nalogurod.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=deep+love+quotes+for+him+in+englishPDF 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_off0001579d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1579D 10956 bytes
SHA-256: 32a9e5717c1ae480fdf9d2f13cdf154d89f0d1bf821d7f6fa06b56bc68ca8298
font_01_sfnt_off00017085.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17085 17084 bytes
SHA-256: a4cc11eca88d11475cac7f17d875ccd014dcf3efbc5dd282dd82117598afb85b
font_02_sfnt_off00019c45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19C45 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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