Malicious PDF — malware analysis report

Static analysis result for SHA-256 e60968e1f9dc555b…

MALICIOUS

PDF

82.5 KB Created: 2021-09-18 17:12:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: bcef776c49b3852cb418a240c8731c4f SHA-1: 1889c743966f20d13d37ff985645a157679f2615 SHA-256: e60968e1f9dc555b2f3746d5eb8099e3bcf70eff2b9153dff5344f57986305e8
204 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous links pointing to potentially malicious PDF files hosted on compromised WordPress sites and other domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to deliver a phishing or trojan payload. The embedded JavaScript is likely used to obfuscate the malicious links or initiate a download.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 8

  • 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 to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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.
  • 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 https://cananalimdar.com/wp-content/plugins/super-forms/uploads/php/files/5ej8pj2ttr9dqedqgk8p8on71a/judazagifuwazujuxasu.pdf In PDF document text
    • http://banghetretunhien.com/media/ftp/file/jatokurasu.pdfIn PDF document text
    • http://ngoinvest.com/uploads/ckfinder/files/96707069270.pdfIn PDF document text
    • http://uspeh-kursk.ru/ckfinder/userfiles/files/4720656378.pdfIn PDF document text
    • http://w.scenekunstskolen-efteruddannelsen.dk/ckfinder/userfiles/files/gerisifadekawavakiviruzur.pdfIn PDF document text
    • http://due.pt/js/ckfinder/userfiles/files/laginosedunagotaw.pdfIn PDF document text
    • https://cantellodetersiviprofessionali.it/uploads/file/81318032859.pdfIn PDF document text
    • http://collegium-connect.nl/ckupload/files/nuwetafubura.pdfIn PDF document text
    • http://ahppesticide.com/userfiles/file/4826457526.pdfIn PDF document text
    • http://studiomedicoveterinariobellucci.eu/userfiles/files/gosedat.pdfIn PDF document text
    • https://www.mediawerf.nl/bundles/store24backoffice/ckfinder/userfiles/files/nipaxitoz.pdfIn PDF document text
    • http://lmleadmanagement.com/userfiles/files/59034517574.pdfIn PDF document text
    • http://ourpreferred.com/userfiles/files/91595798840.pdfIn PDF document text
    • http://stroynerud-sm.ru/wp-content/plugins/formcraft/file-upload/server/content/files/161415d952fca6---98690104348.pdfIn PDF document text
    • http://cleanking.net/userData/board/file/51336187696.pdfIn PDF document text
    • http://sushigonewildtogo.com/uploads/files/nivevenuz.pdfIn PDF document text
    • http://salman-group.com/userfiles/file/97100814977.pdfIn PDF document text
    • https://www.kiteschule-eckernfoerde.de/wp-content/plugins/formcraft/file-upload/server/content/files/161353c6118189---88269254975.pdfIn PDF document text
    • https://goldenparadisestsimons.com/wp-content/plugins/super-forms/uploads/php/files/a8bd81c680956c52472eaa3a0d3e2f79/tiramewewof.pdfIn PDF document text
    • http://zapatosperezcabrera.com/ckfinder/userfiles/files/benavuxefi.pdfIn PDF document text
    • http://pkpneu.cz/userfiles/file/rodunozanapo.pdfIn PDF document text
    • http://spbmedax.ru/sites/default/files/uploads/poforelasitubarobose.pdfIn PDF document text
    • https://datawire.gr/files/files/95594949353.pdfIn PDF document text
    • http://paolacaone.eu/userfiles/files/bekutajowagelofasa.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=google+account+manager+6.0+frp+apk+downloadPDF 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_off0000da84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA84 11376 bytes
SHA-256: 12f54a7e4a845acfb113d9f494992d268191961c54364566a3cb72ff77da5d4f
font_01_sfnt_off0000f53f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF53F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010d51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D51 18160 bytes
SHA-256: ec947b274beab464f59def6d3b1e4025bfd9fbcacf3df988e9a0abd28915557f

Open this report in the interactive analyzer, or submit your own file for analysis.