Malicious PDF — malware analysis report

Static analysis result for SHA-256 2cd7c02d0cd967ee…

MALICIOUS

PDF

76.8 KB Created: 2021-05-11 01:33:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7a9a23d4143d1005536daffdf4685b70 SHA-1: 19342f522e2d258483d27961ac6b6f62d59fb4a1 SHA-256: 2cd7c02d0cd967ee401718609083a00e6247d53b361ce604818aa6c4c1d29590
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, specifically as a phishing or trojan delivery mechanism. It contains numerous links to external websites, many of which are hosted on compromised CMS uploads or disposable domains, indicating a link farm designed to redirect users to malicious content. The presence of these links and the overall structure strongly suggest an attempt to lure victims to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 http://aaaexpressac.com/userfiles/file/15102334861.pdf
    • http://www.radioemka.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d205503e85---vifopad.pdf
    • http://compie.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16080128ace5b8---67397092611.pdf
    • http://www.predoisiasociatii.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16080f76fda0e0---15268634236.pdf
    • https://www.capitalroofingct.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084f025e5b37---wewaganokujeke.pdf
    • http://ivepe-elearning.gr/assets/UserFiles/mainHome/file/fowavavelo.pdf
    • https://lsp.od.ua/wp-content/plugins/super-forms/uploads/php/files/khj839iemua34s8k3fofacpuv1/bakifupi.pdf
    • https://action-roofing.com/wp-content/plugins/super-forms/uploads/php/files/ba0b87844d0abbb937d65f50ebda697d/divegotitu.pdf
    • http://mirembeestate.co.ug/wp-content/plugins/formcraft/file-upload/server/content/files/1607eef2f42e32---sopelere.pdf
    • http://axwelindia.com/uploads/5588205902.pdf
    • http://ar-intl.net/wp-content/plugins/super-forms/uploads/php/files/7dr1u72dj11pglmsjsttav41v3/19194714413.pdf
    • http://www.norestim.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1608e248c01f78---85230527317.pdf
    • https://amenajarisiconstructii.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1607b25fe8b9f2---zikijemesofel.pdf
    • https://flycam.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1608b021bb05ba---86335061207.pdf
    • http://uat.ideadunes.com/projects/ideadunes-portfolio-site/wp-content/plugins/formcraft/file-upload/server/content/files/16095d6ed60ed5---watutonobilojabe.pdf
    • https://www.nosolodespedidas.es/wp-content/plugins/formcraft/file-upload/server/content/files/16090b5a02a730---wegasi.pdf
    • https://sipsib.ru/wp-content/plugins/super-forms/uploads/php/files/6041150b8a9e22f4e2a30f1520958629/33579078832.pdf
    • https://maloneslandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e1accd3ced---53132203850.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=anbe+anbe+song+from+darling++masstamilan
    • 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://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e0fc.bin
3319d972f9cc8cc75833ec34bd3f1dcf581e86b93b73ca3d0458c232fccbe245
pdf-font-stream PDF embedded font (sfnt) at offset 0xE0FC 5144 bytes
font_01_sfnt_off0000f25b.bin
2e2f4b0989901f689f49e8cc41ae8851677e06d43a3e040b01e0b63803d67d8c
pdf-font-stream PDF embedded font (sfnt) at offset 0xF25B 11024 bytes
font_02_sfnt_off000117e5.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176
pdf-font-stream PDF embedded font (sfnt) at offset 0x117E5 4324 bytes