Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a180ca2417f7cc2…

MALICIOUS

PDF

80.3 KB Created: 2021-09-22 09:15:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: da723bbe6a9d77c439d5ed19d229b611 SHA-1: 1a583b795b9cc066dc2d540aa5b2382721a2ecdd SHA-256: 6a180ca2417f7cc2e436c64a63834a118ab9561c5774981c61d0d184b6d4f2bb
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, a common technique for executing malicious code within documents. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' and the numerous extracted URLs suggest a phishing or content-luring campaign. The ML classifier and ClamAV detection strongly indicate malicious intent, likely involving redirection to malicious sites or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://gold-carsales.com/js/upload/files/33852282313.pdf In PDF document text
    • https://assignmentmart.com/ckfinder/userfiles/files/78144607789.pdfIn PDF document text
    • https://wronba.pl/uploads/wysiwyg/file/30256416807.pdfIn PDF document text
    • http://crm333.com/documentos/file/89098065603.pdfIn PDF document text
    • http://budohurtsa.pl/userfiles/file/43159123227.pdfIn PDF document text
    • http://lesbambousbleus.fr/ckeditor/upload/files/2137662331.pdfIn PDF document text
    • https://gpagroup.in/wp-content/plugins/formcraft/file-upload/server/content/files/1613de626d4914---81135614227.pdfIn PDF document text
    • http://svazekobciorlice.cz/userfiles/file/vekomudojekon.pdfIn PDF document text
    • https://hazeloyun.com/calisma2/files/uploads/lamutezexezurogimo.pdfIn PDF document text
    • http://adance0112.com/upfile/editor/file/fefamefinogekexed.pdfIn PDF document text
    • http://veterina-naslunci.cz/userfiles/file/dewip.pdfIn PDF document text
    • https://iwanbim.iwan.co/userfiles/files/mososujo.pdfIn PDF document text
    • http://immopolignano.lu/images/28080651695.pdfIn PDF document text
    • https://gazeta-msp.pl/user_files/File/67350162021.pdfIn PDF document text
    • https://lisacutler.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136511311e9e---faguwezazazupiramug.pdfIn PDF document text
    • http://sun-marche.com/app/webroot/js/ckfinder/userfiles/files/fakefubepanikelewakirum.pdfIn PDF document text
    • https://nurdagihaber.com/resimler/files/19000512736.pdfIn PDF document text
    • http://dulwichtaxi.com/survey/userfiles/files/nutitezav.pdfIn PDF document text
    • http://thanhnienxp.com/vietkiendo/upload/file/22608797807.pdfIn PDF document text
    • http://espokebar.com/uploads/files/lomalu.pdfIn PDF document text
    • http://homespakistan.net/magzine/uploadfiles/file/75469762385.pdfIn PDF document text
    • http://uptindia.com/newsimages/file///wiselolowosutufaburilivof.pdfIn PDF document text
    • https://bostaninsaat.com/image/files/kubumuxevevusesufarunejes.pdfIn PDF document text
    • http://rockhousemethod.com/ckfinder/userfiles/files/kuzuzidaku.pdfIn PDF document text
    • http://snuhonors.com/userfiles/file/72267560291.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=use+external+sd+card+as+internal+storagePDF 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_off0000d6a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6A2 17024 bytes
SHA-256: a396e10dd09fa4d985924b69ce5376748dcc68b33f3c639db1a3c05c96bf19f7
font_01_sfnt_off00010310.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10310 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011b27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B27 10656 bytes
SHA-256: 83e6d0b268b76833df669d6a93343f3a132f32f899153c17240e64136eb12e2c