Malicious PDF — malware analysis report

Static analysis result for SHA-256 701467f92179018d…

MALICIOUS

PDF

89.0 KB Created: 2021-09-07 13:34:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 185146bc10ae459e81e5d017ca7d5283 SHA-1: a78c31676fdea25cc450b9ce959c18e3eab233d8 SHA-256: 701467f92179018daf879fc399955277af6dac33d005c17f0f14b5b466b0fa2d
156 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many of which appear to be hosted on compromised CMS platforms or disposable domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The document body is heavily obfuscated and does not provide clear textual lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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
  • 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
  • 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://oniceh.ru/uplcv?utm_term=makalah+mekanisme+pasar+dalam+islam+pdf PDF link annotation
    • http://bioaec.com/userfiles/files/nokuzuzikarowap.pdfIn PDF document text
    • http://lncxjzxxw.com/upload_fck/file/2021-6-2/20210602174906787264.pdfIn PDF document text
    • http://fruitvita.com/files/files/dalapaloxulobujazewoje.pdfIn PDF document text
    • http://hccc252.ca/clients/e/e4/e484b38507f190a955b66748903449e1/File/46923454546.pdfIn PDF document text
    • https://phucatgarment.com.vn/ckfinder/userfiles/files/35929839382.pdfIn PDF document text
    • http://3duct.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080118dc5a5b---vavekezuxaga.pdfIn PDF document text
    • http://dichvuhieuchuan.com/upload/files/kinalidoguveporenotilil.pdfIn PDF document text
    • http://brighterhealthcare.co.uk/wp-content/plugins/super-forms/uploads/php/files/2tk4b9vmb10lbdp77r1dkregfd/73776594158.pdfIn PDF document text
    • http://zaragozalawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/866436342.pdfIn PDF document text
    • http://global-poseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/161312ea539ee0---ralidoburavus.pdfIn PDF document text
    • http://amdind.com/userfiles/file/tevifas.pdfIn PDF document text
    • http://oneself.pro/wp-content/plugins/formcraft/file-upload/server/content/files/160b59aead6472---kidiw.pdfIn PDF document text
    • http://buren-kompanie.de/userfiles/files/fozexiwu.pdfIn PDF document text
    • http://www.misshandicap.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160721b9d5ad7e---jomajelizalatoselu.pdfIn PDF document text
    • http://rqconsultores.com/userfiles/file/54632914727.pdfIn PDF document text
    • https://ccveg.org/wp-content/plugins/super-forms/uploads/php/files/3b1pa9ui2753utgg4ihn6esu01/ruzuzinediwivukubukez.pdfIn PDF document text
    • http://koreadramatour.com/FileData/ckfinder/files/20210810_8BD3687253347D8A.pdfIn PDF document text
    • http://topspeed4wd.com/ckfinder/userfiles/files/89228302322.pdfIn PDF document text
    • http://good163.cn/Uploadfiles/files/lerelitemanozuwufite.pdfIn PDF document text
    • https://meesens.be/KrMee/Tekstverwerker/rotibadomuvelenen.pdfIn PDF document text
    • http://theurbanbazzaar.com/userfiles/file/gonegobilekajinivizo.pdfIn PDF document text
    • http://tsradviseurs.nl/mailing/images/photo/file/55321963502.pdfIn PDF document text
    • https://www.andeanskyline.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d0e961afa8---wiwigijudofoxuwatuwetegiv.pdfIn PDF document text
    • 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_off0000fb3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB3A 10632 bytes
SHA-256: 893e8a5b4d14dc2fb3278ed28b96d7cd21b7309b1065c2becef298470570ecab
font_01_sfnt_off0001133a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1133A 16516 bytes
SHA-256: 054e84a5520e0700fc037599e7d2e6a975fea070c8523d370346fd417346e27f
font_02_sfnt_off00013e13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E13 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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