Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea2e7a98b558b162…

MALICIOUS

PDF

101.8 KB Created: 2021-07-04 04:09:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 36d99c904cb54a7ea36ac7d4aed2f5a3 SHA-1: af7ba32d220f836212a54e68f771c43625e06244 SHA-256: ea2e7a98b558b162c4ff6cc2e99612ff74ff4e222d42362739bbc581c1a2eaa6
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised WordPress sites, which in turn host other PDFs. This structure suggests a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9929

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 https://olmitek.by/wp-content/plugins/super-forms/uploads/php/files/7bk3d2pft3rsk21cj0v1s07qj3/marel.pdf
    • http://www.kreasoft.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160bab6ae810fc---jibemabedenedi.pdf
    • https://centrobrands.com/wp-content/plugins/super-forms/uploads/php/files/14ce23bcb2f734cfac9b6b99ffe755ca/dutizanubanojeruke.pdf
    • http://alsumiri.net/wp-content/plugins/super-forms/uploads/php/files/46a60951136dd1ad1aa8eb428916d914/noxaxogexiresiruv.pdf
    • https://wscnaturalhealings.com/wp-content/plugins/super-forms/uploads/php/files/70887badccb3b430bf2faac63ae1df2e/salinogifenikokawa.pdf
    • http://robalton.es/Albums/images/file///pufuzewowujilunoxafu.pdf
    • https://belgradenightlife.info/wp-content/plugins/super-forms/uploads/php/files/6ihlfki7s2q4r67446fe8dmfoh/dofamagevobej.pdf
    • http://banglatalkies.com/dynamic-images/cms/file/24748550697.pdf
    • https://karinbentum.nl/uploads/file/nezibuzuwe.pdf
    • https://mziagroup.com/wp-content/plugins/super-forms/uploads/php/files/ca3bcstnffq5ek7q4rdsensa18/pixekoget.pdf
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/480fa4a6a859a402d4dd7a5e46af0efd/88709469214.pdf
    • https://www.3dreamchurch.com/wp-content/plugins/super-forms/uploads/php/files/54cc01c6aba8b890002ba08fca7bb8c1/riturijejigemabimigovepe.pdf
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/vfjtfr6729arns57bed5amljqt/55945542993.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608021ac4be44---satufijovadivo.pdf
    • http://zabradli-znerezu.cz/userfiles/file/22359851384.pdf
    • http://yournamebadges.com/withyourdog/cms_uploads/file/lakosikumagox.pdf
    • https://nowackleverkusen.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a8a146bff76---27367118071.pdf
    • https://coachtourbusrental.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ee7d07c842---82006835121.pdf
    • https://paloaltospeakerseries.com/wp-content/plugins/super-forms/uploads/php/files/67b27d21bebe61a592d5007e402f8cd6/19607430010.pdf
    • http://archimax.ch/dynamic-images/cms/file/2250265019.pdf
    • https://realimpacto.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16091321d7fa25---tubulogijopaj.pdf
    • http://pocatellocampfire.com/wp-content/plugins/super-forms/uploads/php/files/mh13srq3rjuk8k5hf5snec9f78/10538479020.pdf
    • http://antik-cafe-bergen.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a242553bfc6---tivuzolugibog.pdf
    • http://eltonltd.ru/sites/default/files/uploads/kejej.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=witch+doctor+armor+sets
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012c5e.bin
69a1fdf5b3616e783721fe878ae3f3f698381e651367b6fa87f85bbae00b65aa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12C5E 17744 bytes
font_01_sfnt_off00015b12.bin
598eda8ab9529082c232da003200bcc2358bcc11513c9644b1c396cce45a7a2e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15B12 10480 bytes
font_02_sfnt_off000172ef.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x172EF 16792 bytes

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