Malicious PDF — malware analysis report

Static analysis result for SHA-256 5801beece2fa2205…

MALICIOUS

PDF

87.0 KB Created: 2021-06-26 04:09:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: feafb261ac78ed19fa742a3a95f63b0a SHA-1: 5459ce55933e9986a487d3b765cfe28ab57f8df4 SHA-256: 5801beece2fa2205beac78f87d5f4df5474246e52787d515e81fac0ca82424cc
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm on compromised CMS uploads, suggesting it's designed to redirect users to potentially harmful sites. Although no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://fashioncenterpoint.com/wp-content/plugins/super-forms/uploads/php/files/d88fda5539cce696ab1092d2fbead82e/33761464555.pdf
    • https://rmdschoolandcollege.com/wp-content/plugins/super-forms/uploads/php/files/j3sifko4fp5c9mahi1m8i2bkg7/sibavojezunewotisa.pdf
    • https://xn--80aaa1anac6cg.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/4b423b547ed7ea2ec33a5db09ea23c19/levinelizinejupudisoripe.pdf
    • http://miamiwars.pl/wp-content/plugins/super-forms/uploads/php/files/3ca13b5c9ac5726b4f4fe048308e100d/59334971404.pdf
    • http://armanetti.com/images/kotuzugixizeru.pdf
    • https://soudurelauziere.com/upload/editor/file/6369621604.pdf
    • http://modnyi-buket.ru/uploads/files/petixugaboleriximina.pdf
    • http://www.thunderesp.com/ckfinder/ckfinder.htmlfiles/40191808128.pdf
    • https://ipcare.nl/wp-content/plugins/super-forms/uploads/php/files/3s5o42prl1c36j5jm2ngtllsu0/73414765579.pdf
    • http://www.predoisiasociatii.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16071a07355cd7---90796020080.pdf
    • https://leganordavigliana.it/uploads/file/nevekosixex.pdf
    • https://na-nule.ru/wp-content/plugins/super-forms/uploads/php/files/nnj0smpht12gmb4jm1qp68d5r2/kezilosovusugow.pdf
    • http://abapaposentados.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160bbccc18a09f---tixiwow.pdf
    • http://terapeutickemasaze.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1607019e7a48e3---ropimakejikuv.pdf
    • https://evocative.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a43954ca4d8---19135773850.pdf
    • https://www.bluegreenshouseboats.in/wp-content/plugins/formcraft/file-upload/server/content/files/1606ccff954334---76199888347.pdf
    • https://www.guestquesttravelmedia.com/wp-content/plugins/super-forms/uploads/php/files/vjnnvkm85vn0cq8ag6k8n46mem/lirirolevage.pdf
    • http://engroupe.ca/aym_image/files/34609478126.pdf
    • http://hamdard.com/hamdard/app/webroot/img/ckfinder/userfiles/files/26585632342.pdf
    • http://lubrifianti-auto.ro/files/file/dijunisudal.pdf
    • https://sandzak.best/wp-content/plugins/super-forms/uploads/php/files/fc2e5f835376d72418bd61ff7f65f01e/gevonaxutazisasuloxezide.pdf
    • http://teraval.cz/res/file/63537410439.pdf
    • http://stinpo.com/ckfinder/userfiles/files/58837476119.pdf
    • http://grandchainfamilyfoundation.org/clients/85333/File/49575691604.pdf
    • https://rmp-traueranzeigen.de/cms/files/23502727236.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=st+patrick%27s+day+2021+images+free
    • 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_off0000ede4.bin
0d583c0bcc09e52155febcdea4c74ce62aa50f3e2a1068332f5ab89522059142
pdf-font-stream PDF embedded font (sfnt) at offset 0xEDE4 11300 bytes
font_01_sfnt_off00010879.bin
1be981184b11ef0d016c1ffc82b28656feead2be5a63e1355a41970dd3e68bf7
pdf-font-stream PDF embedded font (sfnt) at offset 0x10879 17128 bytes
font_02_sfnt_off000134fe.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x134FE 16792 bytes