Malicious PDF — malware analysis report

Static analysis result for SHA-256 67600954a33dbc11…

MALICIOUS

PDF

79.1 KB Created: 2021-07-05 05:20:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ccb8a68c1f6cf70ace30fe7e1ed6f41d SHA-1: 15776102f51ad6c0514b52e05f5b8b02c4a5fd02 SHA-256: 67600954a33dbc11ff385fe744770e3d7aefeb34f87e8683e8efad7d2df71da6
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs that form a link farm, many pointing to compromised WordPress sites or disposable hosting. The primary purpose appears to be redirecting users to external sites, likely for phishing or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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://drafthe.ru/uplcv?utm_term=fully+scaled+mirror
    • http://ahkkpcm.org/userfiles/66774909373.pdf
    • https://bio-obst-und-gemuese.de/userfiles/file/ganurizupivuxikad.pdf
    • https://pelicanfinancialnetwork.net/ckfinder/userfiles/files/bolavatugopudabavuxagupog.pdf
    • https://www.frankcapassoandsons.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b612bc66442---9384087064.pdf
    • https://michaels-limo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ee3d8d8913---3396072155.pdf
    • https://badrivishal.com/media/47211093025.pdf
    • http://atenngo.com/admin/sites/site/documents/91121656724.pdf
    • http://akinmedical.com/uploads/file/xawapelavebe.pdf
    • https://belhasasecurity.com/userfiles/file/66297946219.pdf
    • http://www.ebsjosepirosamaria.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cbe9a44d00b---27144897909.pdf
    • http://vencedor.coop/images/admin/file/49510668548.pdf
    • http://www.phonefixcomo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ddd9e628b8---duworavafabes.pdf
    • http://dailycan.com/userfiles/files/rekana.pdf
    • https://hzautomatisering.nl/userfiles/file/60636304343.pdf
    • http://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608e4257bd96e---53019766613.pdf
    • https://vizzzio.ru/wp-content/plugins/super-forms/uploads/php/files/1983a988a51f53c76e086467753e889f/davomunipadofiz.pdf
    • https://performanceltg.com/wp-content/plugins/super-forms/uploads/php/files/88ce3b4c40d282282e3bdd01806908c4/nuzadajinujotadineri.pdf
    • http://suportti.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba4d074d12a---46896401917.pdf
    • http://vom-ragnaroek.de/uploads/file/nadanedime.pdf
    • http://africareview.in/userfiles/file/31504204235.pdf
    • https://gccpay.net/wp-content/plugins/super-forms/uploads/php/files/d81aacd45c50be1abed9dd08b82288a4/xabereberevekosafona.pdf
    • https://rebates.forex/wp-content/plugins/super-forms/uploads/php/files/hve0haq8ecjknic65chko96j97/fifisabazusawodan.pdf
    • 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_off0000d327.bin
e1f7b5c04d1bb304a46a15333343bda009c42d0e35548730abecdc46df150bd9
pdf-font-stream PDF embedded font (sfnt) at offset 0xD327 10520 bytes
font_01_sfnt_off0000eb19.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xEB19 16792 bytes
font_02_sfnt_off0001032b.bin
1a57fde023585c1e37c584cb3603d7d4b6423b6113c6304ce03a1a1a36945a99
pdf-font-stream PDF embedded font (sfnt) at offset 0x1032B 16968 bytes