Malicious PDF — malware analysis report

Static analysis result for SHA-256 b649dacc4c3327f6…

MALICIOUS

PDF

73.5 KB Created: 2021-09-25 01:30:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 74146b5747518e3e3aeda96775a71f6f SHA-1: 34be6178635e91762cbd2c51998d749c46d7ee11 SHA-256: b649dacc4c3327f623ff66378b280f5fed689121d9acf816f2db20702216d154
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The file is identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains multiple embedded URIs, including one pointing to a raw IP address, which is a common tactic for hosting malicious content. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic suggests the document is part of a link farm designed to obscure the true destination, further supporting a phishing or malware distribution attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9915

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
  • 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.
  • 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://sahyadrisevasanstha.in/userfiles/file/wosejasimokatan.pdf In PDF document text
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/1613da3ac428fb---74193533688.pdfPDF link annotation
    • http://onlineticketreview.com/images/file/zudinotapuvevajawo.pdfIn PDF document text
    • http://kimwendelldesign.com/ckfinder/userfiles/files/kavumuwuz.pdfIn PDF document text
    • https://marcvandewiele.com/userfiles/file/25473055879.pdfIn PDF document text
    • http://nadiadsa.org/userfiles/file/78969976396.pdfIn PDF document text
    • https://designmaster.in/scgtest/eec-new/codelibrary/ckeditor/ckfinder/userfiles/files/25516943926.pdfIn PDF document text
    • http://www.barankayalar.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/161407a2513ff6---66573915344.pdfIn PDF document text
    • http://xn--2-140-swe8h.xn--p1ai/files/98853406383.pdfIn PDF document text
    • https://swaarm.de/app/webroot/upload/files/rokezabemogibosigekiwor.pdfIn PDF document text
    • https://almondzwealth.com/administrator/imagetemp/file/97568452019.pdfIn PDF document text
    • http://swhwsolution.it/ckeditor-ckfinder-integration/uploads/files/76011567140.pdfIn PDF document text
    • http://vocal.bpv.su/content/files/files/37935294422.pdfIn PDF document text
    • http://yonseri.org/userfiles/files/goloxikagoxatofikep.pdfIn PDF document text
    • http://julianina.de/upload/file/kuroxofagivuvirerapemurob.pdfIn PDF document text
    • https://novitas.ro/files/6728338512.pdfIn PDF document text
    • http://avsa.org/sites/default/files/images/files/2505331724.pdfIn PDF document text
    • https://delaneyllc.cfonewsletter.com/ckfinder/userfiles/files/bilijurezodogok.pdfIn PDF document text
    • http://nutranghongngoc.com/media/ftp/file/fatuxadusenulim.pdfIn PDF document text
    • https://confeccionesruiz.cl/UserFiles/File/46661413608.pdfIn PDF document text
    • https://myshalewell.com/userfiles/file/texufulizesotefa.pdfIn PDF document text
    • https://pabausa.org/wp-content/plugins/formcraft/file-upload/server/content/files/1614c413dd4838---20017029726.pdfIn PDF document text
    • https://mattress-leader.com/media/lowepozazulepagegikonozol.pdfIn PDF document text
    • https://www.hkfew.org.hk/ckfinder/userfiles/files/50474314359.pdfIn PDF document text
    • https://renault-service.com/userfiles/96411197014.pdfIn PDF document text
    • https://open-call.fr/uploaded/files/gakuzok.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=best+cash+register+app+androidPDF 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_off0000b955.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB955 17216 bytes
SHA-256: 06129c8b619288b189fad69e23abd2220a1628157f9ffbd301bfcbacf5d2ca06
font_01_sfnt_off0000e5e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5E3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000fdfa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDFA 10800 bytes
SHA-256: c5e9ddcec4bd36f646b5f5d95ce3e37edb884c985aa08c1b9386a2565de0aa55