Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b0307d468638366…

MALICIOUS

PDF

80.9 KB Created: 2021-09-16 09:07:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 02c80bb6a244567f73045d8d7b1c4daa SHA-1: 798bccd433c66a0b5634b7d3243d9a61c7b6d035 SHA-256: 6b0307d468638366829bddd14fa5ac7b3d03b613c5083713c5476902fd10478d
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The presence of numerous external URIs, many hosted on disposable domains and configured with UTM parameters, strongly suggests a link farm designed to redirect users to malicious content. While no scripts were explicitly extracted, the PDF structure and the nature of the URLs indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://huntic.ru/uplcv?utm_term=jogo+do+naruto+proibido+para+android PDF link annotation
    • https://eliteswimmingpoolsinc.com/wp-content/plugins/super-forms/uploads/php/files/7v87frt38vf8amojt83u2ddv96/44374757600.pdfIn PDF document text
    • https://emons-verlag.com/testarea/cwsCMSlight/media/files/tatofekoma.pdfIn PDF document text
    • http://xn--d1achljw0b.xn--p1ai/content/upload/sugawozelirat.pdfIn PDF document text
    • http://pooq-design.com/app/webroot/fckfiles/file/jawowurusadu.pdfIn PDF document text
    • https://electroagro.es/pub/files/fosogor.pdfIn PDF document text
    • http://formpart.com/upload/ckfinder/files/51410078936.pdfIn PDF document text
    • http://hyunbulsa.org/~ewedd2/userfiles/file/tafofodev.pdfIn PDF document text
    • http://dichvutheapec.com/upload/FCK/file/68759792581.pdfIn PDF document text
    • http://pk.mo/userfiles/file/78155270777.pdfIn PDF document text
    • https://anaksemut.com/contents/files/zemutasijeza.pdfIn PDF document text
    • https://auf.vn/wp-content/plugins/super-forms/uploads/php/files/g1fvjj3len2ofc4coiqvsibuc2/40814201005.pdfIn PDF document text
    • http://thedreams.cz/files/54439485986.pdfIn PDF document text
    • http://mxm-hosting.nl/img/editor/file/depag.pdfIn PDF document text
    • https://www.allduniv.ac.in/ckfinder/userfiles/files/64352434471.pdfIn PDF document text
    • https://etre-cheval.fr/Applications/MAMP/htdocs/etre%20cheval/news_pix/file/nojejumazojedinoxoviv.pdfIn PDF document text
    • http://baschin-heizung.com/meineBilderAlbertGrundschule/file/volaselinabukedotib.pdfIn PDF document text
    • http://anhuicrew.com/upload_fck/file/2021-9-3/20210903000134197708.pdfIn PDF document text
    • https://all-stage-meditation.tw/uploads/files/6137c93a8a505.pdfIn PDF document text
    • https://magnanerie-cazilhac.com/userfiles/file/79661492521.pdfIn PDF document text
    • http://lightningriskassessment.com/ci/userfiles/files/70154105465.pdfIn PDF document text
    • http://blfimmobiliare.com/userfiles/files/78906617593.pdfIn PDF document text
    • https://autoradiator.mn/uploads/ckfinder/files/19147563698.pdfIn PDF document text
    • https://activepymes.com/pub/file/jijijamibebojogulo.pdfIn PDF document text
    • https://kaparatt.com/images/File/306085556.pdfIn PDF document text
    • 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_off0000d6ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6EC 18860 bytes
SHA-256: 67406ccc3f50619a16fd7e54650a1c27e63aa1c38f1dea2e465da090ba734727
font_01_sfnt_off000104a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104A7 10452 bytes
SHA-256: 825528f654a55e6599d5ad886cc08e29b10a22826a08d6a126ea6195287b1aca
font_02_sfnt_off00011c0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C0F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1