Malicious PDF — malware analysis report

Static analysis result for SHA-256 3cf674673f46ad52…

MALICIOUS

PDF

73.7 KB Created: 2021-06-22 09:26:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 2950c7c99e5d5d962f3e0f4dd308d50f SHA-1: a674e8d54ad32f9aa982b77a4d3830f09e9fbe9c SHA-256: 3cf674673f46ad52ba8235b5a895b76f7aa8c378fae06642014311068ee7ec11
154 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous embedded URLs that form a link farm, pointing to compromised CMS uploads and disposable hosting. The primary URL, 'https://allytemp.ru/uplcv?utm_term=the+king+of+fighters+para+android', suggests a lure related to game downloads, likely to redirect users to phishing or malware sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8285

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://allytemp.ru/uplcv?utm_term=the+king+of+fighters+para+android PDF link annotation
    • http://www.mueblesgamez.com/ckfinder/userfiles/files/kajuzuwavoguzetamezaxowe.pdfIn PDF document text
    • http://ndt-tl.ru/upload/file/gozasu.pdfIn PDF document text
    • https://bestofbucerias.com/upload/file/94319584253.pdfIn PDF document text
    • https://tuabogadoangel.com/wp-content/plugins/super-forms/uploads/php/files/b2915c91ac7ac421b838fec7d5461409/35886152690.pdfIn PDF document text
    • https://www.lightingsolutionsal.com/wp-content/plugins/super-forms/uploads/php/files/610977b774185ad16ea16698367369b2/33012205127.pdfIn PDF document text
    • https://aryaayur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160976993275ad---koden.pdfIn PDF document text
    • http://www.prieteniitehnicii.ro/documente/file/woberakosegizowi.pdfIn PDF document text
    • http://ahlhy.com/uploads/file/242104367689.pdfIn PDF document text
    • http://www.majoriscambio.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a0a676d717d---toxaj.pdfIn PDF document text
    • http://www.canadavisaservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a25ce8bdfde---sikagik.pdfIn PDF document text
    • http://xn--2vxr09c6mc.tw/CKEdit/upload/files/6047154416.pdfIn PDF document text
    • http://xiaohecollege.com/d/files/bibaxanafopo.pdfIn PDF document text
    • https://ceadersvalet.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b29f98791bf---livudafofofawumimivut.pdfIn PDF document text
    • http://www.etoiles-recrutement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d03e7a87eb---jagosodadininawuvu.pdfIn PDF document text
    • https://goldengrowers.com/wp-content/plugins/super-forms/uploads/php/files/a9ba0c0856c50d77cfc836934a9c89c4/poxavejezi.pdfIn PDF document text
    • http://yatros.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16085105e151bf---gaxuvivoge.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn 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_off0000da6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA6E 5284 bytes
SHA-256: 34d956b925e4aabe7f0ac52bbbc01f6af353e73fa2f3343707397a75a6de51cf
font_01_sfnt_off0000ec66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC66 11856 bytes
SHA-256: 28dc38c883673fe6921adac55f1deed1ebd17cef965cf3d71bc7af7097947fc4
font_02_sfnt_off0001133c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1133C 16140 bytes
SHA-256: 159427b32ed66bfbde86def5e6c2992bde67dfb25400c4000a37c9b59b949b61

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