Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d9797f4f962effa…

MALICIOUS

PDF

80.9 KB Created: 2021-09-17 18:52:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 79fa2434fb0eb1406fb3fc4515677ebf SHA-1: 1b2938eaa3474922cbf55aeaac229a937e57b675 SHA-256: 2d9797f4f962effaf0d228c8f3aaedc9f9c1774386aa77532b4a4a94d84bf95f
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains embedded JavaScript and multiple external URIs, with a critical ClamAV detection indicating it's a Pdf.Phishing.Trojan. The heuristics also flag it as a link farm on disposable hosting, with one URI pointing directly to an IP address, suggesting a phishing or malware distribution attempt. The embedded JavaScript likely facilitates the download or execution of a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://studiomuraca.eu/userfiles/files/85182819173.pdf In PDF document text
    • https://manhremhoangvan.com/wp-content/uploads/files/81067952098.pdfIn PDF document text
    • https://panama4d.com/contents/files/goparepomivusofatijasut.pdfIn PDF document text
    • https://dukra.sk/editor_uploads/files/jafikijofudag.pdfIn PDF document text
    • http://jeansresource.com/js/ckfinder/userfiles/files/98564879489.pdfIn PDF document text
    • http://restokrat.info/userfiles/file/11354765089.pdfIn PDF document text
    • https://rawoctane.com/uploads/file/bamif.pdfIn PDF document text
    • http://heizler.hu/files/file/73728021198.pdfIn PDF document text
    • http://lisaarkinlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/vubigapenijemurusipuvad.pdfIn PDF document text
    • http://www.bash.cl/media/file/wixejovijikemave.pdfIn PDF document text
    • https://gtsonline.nl/wp-content/plugins/super-forms/uploads/php/files/4c20jun3286i065kclp1qqrdt4/87460381707.pdfIn PDF document text
    • http://www.rec39.ru/wp-content/plugins/super-forms/uploads/php/files/8ae9185689f8060907a363c3a13f1deb/84054088207.pdfIn PDF document text
    • https://penal-garazh.ru/files/bilevizusorikaja.pdfIn PDF document text
    • http://ks-klinika.ru/ckfinder/userfiles/files/rizajowilugedegivup.pdfIn PDF document text
    • http://zs-g.jp/app/webroot/js/ckfinder/userfiles/files/dewaki.pdfIn PDF document text
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614439cc6c917---puwesiti.pdfPDF link annotation
    • http://vinhthuan.com/upload/files/35334199525.pdfIn PDF document text
    • http://kechengchem.com/upload/files/fekagomifalik.pdfIn PDF document text
    • http://teranor.com/ckfinder/userfiles/files/navisisirupoxatarumewiran.pdfIn PDF document text
    • https://pavillonwohlen.ch/userfiles/files/54456530076.pdfIn PDF document text
    • http://antonioruizabogados.es/userfiles/file/ruviju.pdfIn PDF document text
    • https://www.agencesramos.com/ckfinder/userfiles/files/42887331563.pdfIn PDF document text
    • https://hamzsabegi60szallo.hu/UserFiles/File/5900421359.pdfIn PDF document text
    • https://fnb-concepts.com/images/uploads/files/fumekiparak.pdfIn PDF document text
    • http://svatba-emi.com/uploads/pages/files/2471129505.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=gta+san+andreas+full+save+game+file+download+freePDF 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_off0000d500.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD500 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ed12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED12 18352 bytes
SHA-256: f5972a3bbaf7a5448f88193f2849a8337df432dda16fe13804019d8a525f4225
font_02_sfnt_off00011c46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C46 10988 bytes
SHA-256: 637b3a0945049b669b19ab533deacdd7a709ddf2e96500d91e63579f0e1fc21d