Malicious PDF — malware analysis report

Static analysis result for SHA-256 47acc529c3250844…

MALICIOUS

PDF

81.5 KB Created: 2021-09-16 11:22:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ce4d235f0b6bc02bcbc31ce8d178fa00 SHA-1: bf483810f244a2c3e904d34943197ff1c94d3cee SHA-256: 47acc529c3250844d6866a40995ddce5f347061fe1b3afd328a6468effd2d74e
164 Risk Score

Malware Insights

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

The PDF contains a large number of links, many pointing to compromised CMS upload directories or disposable hosting, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery via these external links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://telegid.tv/userfiles/file/81238080175.pdf
    • http://varadimasszazs.hu/uploads/files/piriwanuzezoku.pdf
    • http://omegapizza.net/uploads/files/48809673994.pdf
    • https://swimproject.eu/wp-content/plugins/super-forms/uploads/php/files/6a49229cdaab81da9a1bd1df69ff9571/23824718202.pdf
    • https://artdecor24.pl/uploads/files/67240186241.pdf
    • http://puginternational.com/ckfinder/userfiles/files/soboniputisupose.pdf
    • http://achwvs.love-mrt.com/upload/files/90028905227.pdf
    • http://www.vnv.nu/admin/library/ckfinder/userfiles/files/kakot.pdf
    • https://euroroma-bg.org/files/file/fotog.pdf
    • https://rolcsi-bau.hu/userfiles/files/50112393005.pdf
    • https://nicemexico.net/wp-content/plugins/formcraft/file-upload/server/content/files/1613db7b99f367---6720236501.pdf
    • https://manhremhoangvan.vn/wp-content/uploads/files/kuwadekoniruloze.pdf
    • http://mail.teleserviciomalaga.com/ckfinder/userfiles/files/vofofovewagag.pdf
    • https://dcoderesearch.com/uploads/5742104315.pdf
    • http://gianphoiduyloimodel.com/Images_upload/files/xibel.pdf
    • https://pgp-puh.hr/fck_media/file/devenarojagar.pdf
    • https://rowadalbyt.com/userfiles/files/nupid.pdf
    • http://vivo-mebel.ru/upload/file/56163558298.pdf
    • https://ku4ysk-9lgp4y.com/contents/files/14479378640.pdf
    • http://ne-moloko.ee/wp-content/plugins/super-forms/uploads/php/files/4c13ced9b841641e603bc47fd0dd6000/8024039741.pdf
    • https://digicpictures.com/downloads/gomorazawokisebes.pdf
    • https://gpagroup.in/wp-content/plugins/formcraft/file-upload/server/content/files/16138b3c6b97a6---wumaxojefakuvezer.pdf
    • http://nhadatv.com/webroot/img/files/73615573377.pdf
    • http://savalis.ru/userfiles/file/dozobebalalavujopefa.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=du+screen+recorder+app
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000da6d.bin
3faa0f4c40ab4457bc7626b0a7ce3c3628e430c57e5934c680c669487e8c2d1c
pdf-font-stream PDF embedded font (sfnt) at offset 0xDA6D 18224 bytes
font_01_sfnt_off00010918.bin
5b67a3d050961d1081a5864d211926cb4ec4e3bd7eacbee625f0770999e0b002
pdf-font-stream PDF embedded font (sfnt) at offset 0x10918 10372 bytes
font_02_sfnt_off000120a2.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x120A2 16792 bytes