Malicious PDF — malware analysis report

Static analysis result for SHA-256 39149cdaa703087e…

MALICIOUS

PDF

97.6 KB Created: 2021-09-20 20:58:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: 0ef783a31786407f52618c3cf65e29ec SHA-1: 4cb766486e9d3d3e45f878a5cf6827462b831695 SHA-256: 39149cdaa703087e82ee1868b05b08f766df3ff8879f1f848a494aaa75497c15
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, presenting numerous URLs on disposable hosting, with the primary lure appearing to be a 'movie maker download'. While no scripts were directly extracted, the PDF structure and embedded URLs suggest it is designed to redirect users to potentially harmful content or downloads, likely as part of a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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://pasarant0g3l-turbo-h1t.com/contents/files/93670895921.pdf In PDF document text
    • http://saothienemb.com/uploads/images/files/firobijinipa.pdfIn PDF document text
    • https://www.hungarianassociation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614340a021814---62299520549.pdfIn PDF document text
    • http://adamlegal.com/userfiles/file/89654754619.pdfIn PDF document text
    • https://hasekei.jp/userfiles/file/bodizuxu.pdfIn PDF document text
    • https://www.ediliziaindustriale.com/wp-content/plugins/formcraft/file-upload/server/content/files/16145532ed86fa---simekuxi.pdfIn PDF document text
    • https://hoalavender.net/upload/files/57513844792.pdfIn PDF document text
    • https://bustotoronto.com/userfiles/file/fogavikim.pdfIn PDF document text
    • http://ljhalls.com/wp-content/plugins/super-forms/uploads/php/files/671a44b29de7add973142464ef935e12/57918354309.pdfIn PDF document text
    • https://sunkamalzemecilik.com/userfiles/file/35504098275.pdfIn PDF document text
    • http://zhengfutz.com/v15/Upload/file/2021917051175297.pdfIn PDF document text
    • https://fleseriuassociates.ro/files/file/zefalovadeg.pdfIn PDF document text
    • http://vetcasatenovo.it/userfiles/files/nuxotinajazupubikef.pdfIn PDF document text
    • http://autowagon.it/userfiles/files/ludoxopagunokafidusa.pdfIn PDF document text
    • https://kisikana.hr/userfiles/file/lukapafiwevozanadeguguwip.pdfIn PDF document text
    • http://surausa.com/uploads/files/44112825078.pdfIn PDF document text
    • http://happinessgown.com/upload/users/files/tevewagozonus.pdfIn PDF document text
    • https://kachhiproperties.com/wp-content/plugins/super-forms/uploads/php/files/901001e0297bcdc390fec0f30a87abee/54659602517.pdfIn PDF document text
    • https://unitedfightalliance.com/ckfinder/userfiles/files/fosudubamogu.pdfIn PDF document text
    • https://trinityautorepairs.com/uploads/files/73407431734.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=movie+maker+download+2021PDF 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_off0001195a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1195A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001316c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1316C 18448 bytes
SHA-256: 02cca6abdba2e8fb82227db46af46a62806db53d67044a9b9fac8865b6c37085
font_02_sfnt_off000160c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x160C8 10676 bytes
SHA-256: 06fb362a72826019dd531603678394e7b9aef4d345e8cf604dd64eab2927af72