Malicious PDF — malware analysis report

Static analysis result for SHA-256 08d8ee28908bf10b…

MALICIOUS

PDF

91.1 KB Created: 2021-06-30 22:12:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 6825b3096edab409dc7ed0606d5e4f24 SHA-1: 2962ad1cae3ff92d26327ed4df3075340fb86fe8 SHA-256: 08d8ee28908bf10b64edcedd25021fe90b18a9394f0746575f5034435aaac3a0
172 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a link farm pointing to compromised WordPress upload directories and other hosting, suggesting an attempt to distribute malicious content or phish for credentials. The presence of external URIs and a link farm structure strongly suggests an attack pattern focused on luring users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

Heuristics 8

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.sodigital.it/wp-content/plugins/formcraft/file-upload/server/content/files/16092fb2399f8c---vuderorulofunupixupove.pdf In PDF document text
    • http://yatros.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16095f22ca6e41---dajon.pdfIn PDF document text
    • http://aarogyamedico.com/userfiles/file/15155189483.pdfIn PDF document text
    • https://drainscovers.com/wp-content/plugins/super-forms/uploads/php/files/6a9923f21d0cd8dfc52a4d7d09f7a026/luvevujob.pdfIn PDF document text
    • https://instalacje-elektryczne.net/ckfinder/userfiles/files/bixozelifogidasatejet.pdfIn PDF document text
    • http://x04ydivan.ru/userfiles/file/23390817275.pdfIn PDF document text
    • http://www.nisbd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c38c2c0b879---87631857089.pdfIn PDF document text
    • http://evabody.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1606f296b71d76---26846893284.pdfIn PDF document text
    • http://scro.ru/pic/file/vulefikesazeputefalubi.pdfIn PDF document text
    • http://akgikorea.com/file_upload/fck_upfile/file/84338481520.pdfIn PDF document text
    • https://freedomtampons.com/wp-content/plugins/super-forms/uploads/php/files/4d4513754ea1ff78091b6e28507673c6/96985188323.pdfIn PDF document text
    • https://quangcaowebsite.vn/uploads/files/84536412981.pdfIn PDF document text
    • https://catwalkdogcome.com/editor_upload_image/file/85975930005.pdfIn PDF document text
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/uklq8clikto14s0u3ensn7m9p2/jifidadimixebana.pdfIn PDF document text
    • https://yastudio.net/wp-content/plugins/super-forms/uploads/php/files/2faeca3b245c9575974c657f9b0a5c89/venapudoxukedugavawowapaz.pdfIn PDF document text
    • https://wpsqld.com.au/wp-content/plugins/super-forms/uploads/php/files/27fee7bea6baea1563e3ae002bb74f3f/30487933369.pdfIn PDF document text
    • https://ontime-taxi.kg/wp-content/plugins/super-forms/uploads/php/files/3dd391758ea918ffb1fdaef855eb8a51/45302845383.pdfIn PDF document text
    • https://bbpartner.cz/userfiles/file/3039641578.pdfIn PDF document text
    • http://karate-talence.com/newsite/userfiles/files/kobigigabezepukoxevuji.pdfIn PDF document text
    • http://lbs.ac.at/wp-content/plugins/super-forms/uploads/php/files/es4r7gjve446ihtagrp7ser47h/86894203789.pdfIn PDF document text
    • http://vizit-k.net/uploads/editor/files/73048151085.pdfIn PDF document text
    • https://saftanton.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160bdbac44eb50---70190190915.pdfIn PDF document text
    • http://diagonal.org.ar/wp-content/plugins/formcraft/file-upload/server/content/files/160c1508754b04---96331843660.pdfIn PDF document text
    • http://birons.net/wp-content/plugins/super-forms/uploads/php/files/3579bb461e28fc89aa5d87c3be70e967/vatumepojabopobopubonu.pdfIn PDF document text
    • http://uyaviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160942c51f32b4---89974569273.pdfIn PDF document text
    • http://ahxxzx.com/userfiles/202105/file/tapawixosusawugaf.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=polytechnic+pharmacy+previous+year+question+papersPDF link annotation
    • 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_off0000ff4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF4D 17436 bytes
SHA-256: 4628aed44f0156e57a1f00ca2202b8ef07d72b71a3ced70e7794461ba3b616df
font_01_sfnt_off00012cd6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CD6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000144ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x144ED 11068 bytes
SHA-256: 8f2dc13379ff043fb0aeda04d61564a6a37c8a27bdcc27d8b6f5031699f2e29a

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