Malicious PDF — malware analysis report

Static analysis result for SHA-256 7305d4c3d58b1da6…

MALICIOUS

PDF

97.2 KB Created: 2021-09-18 14:52:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: d04dee6fe3a5dd4236e2a3562e0a3a0e SHA-1: 15663db9f5217dc637ac06c1ef92e293253481e8 SHA-256: 7305d4c3d58b1da67d893a9e0f82a8488135c9eb4917b1bb62976bbc564b855a
154 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript and numerous external URIs, with several heuristics indicating it functions as a link farm on disposable hosting, including one pointing to a raw IP address. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. The embedded JavaScript is a common technique for initiating malicious actions within PDFs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

Heuristics 7

  • 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.
  • 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://euredit-editions.com/userfiles/file/90956422111.pdf In PDF document text
    • https://webdatedepot.com/userfiles/file/vopodifopoxefasepuze.pdfIn PDF document text
    • http://detikakdeti.ru/img/file/pudadesafovudesapoliser.pdfIn PDF document text
    • http://www.louthadventures.ie/wp-content/plugins/formcraft/file-upload/server/content/files/16133ab740981e---gajifizovelowiru.pdfIn PDF document text
    • https://grup-insaat.com/userfiles/file/4626181494.pdfIn PDF document text
    • http://triple-a.co.th/ckfinder/userfiles/files/palubulujogajin.pdfIn PDF document text
    • http://ahppesticide.com/userfiles/file/92985952383.pdfIn PDF document text
    • https://vaynhanh365.net/contents/files/97248857129.pdfIn PDF document text
    • http://cu-hinothai.com/ckfinder/userfiles/files/jeruxinuzawusubafega.pdfIn PDF document text
    • http://schokoladenbrunnen.de/idata/nagapakixamorajebabujasu.pdfIn PDF document text
    • http://itaxabc.com/userfiles/file/20210904110719_960732456.pdfIn PDF document text
    • http://turnyras.lt/Files/file/zuvanutaparolewinidapu.pdfIn PDF document text
    • https://lanjutpt1.com/contents/files/58746958782.pdfIn PDF document text
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614050ba701b0---morezobukekili.pdfPDF link annotation
    • http://bindashnews.com/userfiles/file/99796952325.pdfIn PDF document text
    • http://accurateverdicts.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ab4262d74c---65567218655.pdfIn PDF document text
    • https://gamaconsultores.cl/upload/file/nirubeduduwufubixojanizi.pdfIn PDF document text
    • http://location-appartement-venise.com/italie_documents/files/68398196041.pdfIn PDF document text
    • http://princeworldwide.com/multimedia/userfiles/file/49156440707.pdfIn PDF document text
    • http://www.dagmarsvendova.cz/admin/js/ckfinder/userfiles/files/9640196074.pdfIn PDF document text
    • https://cleartunemonitors.com/ckfinder/userfiles/files/28578619834.pdfIn PDF document text
    • http://lesen-und-schenken.de/userfiles/files/burexetegudikokowubugo.pdfIn PDF document text
    • https://brawlcall.com/ckfinder/userfiles/files/26179920034.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=hang+em+high+full+movie+watch+online+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_off0001169d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1169D 18728 bytes
SHA-256: b89ef6903d1587ce7dc655424cb5c6d5e68ed35cc1e4e7f8254dc8d1ec295cab
font_01_sfnt_off0001473e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1473E 10856 bytes
SHA-256: 0e133a42a81542a24cb1d2a902e4b1f190da205e1847d8577f567c92e38e1236
font_02_sfnt_off00016016.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16016 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1