Malicious PDF — malware analysis report

Static analysis result for SHA-256 95c3fce2704c913b…

MALICIOUS

PDF

76.2 KB Created: 2021-06-26 13:21:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: fe0c43b0d29e09fa1f2fca1d5fac8371 SHA-1: 70ff9671cd4e3cb9e5da203c2f7e8c97e9b4687f SHA-256: 95c3fce2704c913b4561b7af7e7ff9653a41ae9f6e9a399cf4ed7bf068449f7c
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many of which point to compromised WordPress sites. These links are likely intended to lure users to malicious content or further stages of an attack. The ClamAV detection and ML classifier strongly indicate malicious intent, consistent with a phishing or credential harvesting campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

Heuristics 6

  • 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.
  • 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://www.audifonosdoshoydos.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd90deb67cb---17219477799.pdf
    • http://www.radioemka.com/wp-content/plugins/formcraft/file-upload/server/content/files/160814c6d4abc7---mifoxonefezun.pdf
    • https://www.perfumista.co.uk/wp-content/plugins/super-forms/uploads/php/files/98d0895dc81f7819f8cc6a1e228f7394/42160735736.pdf
    • https://www.ferienhof-schneider.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609441d54483c---gigakirid.pdf
    • http://younewstoday.com/task/userimages/file/76247391034.pdf
    • http://angarakshaksecurity.com/userfiles/file/42786825780.pdf
    • https://premiumvipbusiness.com/wp-content/plugins/super-forms/uploads/php/files/21c7b39ad223d15417e4afae3d7aa45e/58057191584.pdf
    • https://pasarantogel.com/contents//files/34092652821.pdf
    • http://snookerfootball.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160809df46110c---rurazejeno.pdf
    • https://mattweidnerlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bcd3408435a---94501978583.pdf
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/a89pleavqmk124ed57qts53uu1/robufesikoxobetezomafavo.pdf
    • http://vibrosystem.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1607c29d23c56b---palubu.pdf
    • http://www.nowsingapore.co.id/wp-content/plugins/formcraft/file-upload/server/content/files/16073ba4ec09cb---5025038935.pdf
    • https://healthmatters.me/userfiles/file/81027914000.pdf
    • http://brighterhealthcare.co.uk/wp-content/plugins/super-forms/uploads/php/files/fuc295ejimlm9otcm91s1mvrq2/sonalogelos.pdf
    • https://gaseg.com/wp-content/plugins/super-forms/uploads/php/files/uq5mc2legmdemp4khenkmts9ac/gejetidoweduvenuvo.pdf
    • https://www.inkfactory.pk/wp-content/plugins/formcraft/file-upload/server/content/files/1606cec2715761---85544812415.pdf
    • http://yournamebadges.com/withyourdog/cms_uploads/file/nijotudademamep.pdf
    • https://daluxerealty.com/wp-content/plugins/super-forms/uploads/php/files/mhpu41pt468e1piheptbtfd1u5/bovisezixovumulunatodune.pdf
    • https://www.stamfordtaxis.com/wp-content/plugins/super-forms/uploads/php/files/rinsmot4uoj7nsnjn82kkbvfcp/busufilopobu.pdf
    • http://quickfix-poland.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5d0b00ebb4---tumoxifiwo.pdf
    • https://nutricionintravenosa.com/wp-content/plugins/super-forms/uploads/php/files/316062aa1684c7cf451e15c54278790f/86015619702.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=mg+to+m3
    • 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_off0000c667.bin
9daa0ce0c6472f96af0cdc14ceb04640110c04250bf041eaa9d44b87f37078f0
pdf-font-stream PDF embedded font (sfnt) at offset 0xC667 18080 bytes
font_01_sfnt_off0000f50c.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF50C 16792 bytes
font_02_sfnt_off00010d22.bin
174e644e1235d0c01619c7f613558b5471d788b6f08f0a71c66c56340102bc30
pdf-font-stream PDF embedded font (sfnt) at offset 0x10D22 9812 bytes