Malicious PDF — malware analysis report

Static analysis result for SHA-256 5dee932a72c16f62…

MALICIOUS

PDF

70.7 KB Created: 2021-09-01 23:35:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 7749597c45f3eb837f08bdad26c03aac SHA-1: ab16a8b93d6e2f831d1279ecaed2e7f6230d3b3b SHA-256: 5dee932a72c16f62bf94c3e6807fdfee81f19248ef97f2fe058ec7639d38d09b
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised WordPress upload directories, suggesting a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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.
  • 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://chocolatycakes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606eb4707e83a---xesezetutunozufeferig.pdf In PDF document text
    • https://thejasmineway.net/wp-content/plugins/super-forms/uploads/php/files/le53knlcc8nn87gahm9p805fnc/68064078788.pdfIn PDF document text
    • http://homeshopeez.com/uploaded_files/userfiles/files/81425257153.pdfIn PDF document text
    • https://jensbrode.de/files/file/7267207558.pdfIn PDF document text
    • https://soba05.org/wp-content/plugins/super-forms/uploads/php/files/c6ba458710595a5b4cf434daa09ddae3/82850561672.pdfIn PDF document text
    • https://championsforchildren.org/wp-content/plugins/super-forms/uploads/php/files/567e7deeeed57a7b75efe49f45db2478/44777086670.pdfIn PDF document text
    • http://xboxheerlen.nl/userfiles/file/zasufukipibekoduk.pdfIn PDF document text
    • http://ljhalls.com/wp-content/plugins/super-forms/uploads/php/files/031af88ed67d14ddb4e88405e62ebd30/76810187571.pdfIn PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d61d1c2eed.pdfIn PDF document text
    • https://nabijdefossa.nl/upload/files/vaminaguja.pdfIn PDF document text
    • https://cuisinescartier.ca/upload/editor/file/sewugigabumifa.pdfIn PDF document text
    • https://bonpetsupply.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074ba0633f24---leziwavusopewivunitixa.pdfIn PDF document text
    • https://majorsagilekvaros.hu/uploads/file/45822685618.pdfIn PDF document text
    • http://greenld.com/userfiles/sipafi.pdfIn PDF document text
    • http://sangiorgioautoservizi.com/userfiles/files/49069609434.pdfIn PDF document text
    • http://ttc-investco.com/img/files/40470236525.pdfIn PDF document text
    • http://benrassam.com/uploads/files/98495627049.pdfIn PDF document text
    • https://admonks.ru/wp-content/plugins/super-forms/uploads/php/files/10025e0f57f8aa64634a6815db3f1a7b/kosorumulamigewamadeba.pdfIn PDF document text
    • https://skazkavdom.com/wp-content/plugins/super-forms/uploads/php/files/6edc563351f96dfd32435a10c7a403eb/33793563507.pdfIn PDF document text
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/rp5qorgjji5c5vr3655inkl9l6/24685614807.pdfIn PDF document text
    • http://alpha-th.com/userfiles/file/68104834143.pdfIn PDF document text
    • http://njuhome.pl/ckfinder/userfiles/files/45655559363.pdfIn PDF document text
    • https://provisionsinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac354b7b9cb---15461488938.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=seven+sisters+biblePDF 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_off0000b7e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB7E7 15204 bytes
SHA-256: 1732bc97c965763b082a00e044fa609c24416a83dbe0f4ac18046dabe2ce7ddb
font_01_sfnt_off0000de88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE88 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f69f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF69F 10100 bytes
SHA-256: 87f0b887b9fca591b804fad175b703481e0800e104e1753fc6072cff753bb645