Malicious PDF — malware analysis report

Static analysis result for SHA-256 d227eb2c2c6d37e4…

MALICIOUS

PDF

98.6 KB Created: 2021-07-16 23:21:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 944bd473d6445228550872ff9e3b3de0 SHA-1: d71d8058d1b1f8e63dc4a72f57f1985c4fc06de6 SHA-256: d227eb2c2c6d37e47d83ea30fcbaa974bc4a72bc476d0044a365d08ea809b84c
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. It functions as a link farm, containing numerous URLs pointing to potentially compromised CMS upload directories. The presence of these links suggests an attempt to lure users to malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9936

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://siphouse96.com/wp-content/plugins/super-forms/uploads/php/files/86a4a7bfc50028a76df38e47bf5b2f98/5520353368.pdf In PDF document text
    • http://blpest.com/UserFiles/file/wavigowakulebob.pdfIn PDF document text
    • http://www.barankayalar.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160d72671045ee---bozofodalaz.pdfIn PDF document text
    • http://adabaskimerkezi.com/upload/file/95526932124.pdfIn PDF document text
    • http://maekuangudomthara.com/ckfinder/userfiles/files/tuseragoredefuku.pdfIn PDF document text
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/9510f7fdbad9a3d46177fa61037d0624/75103483342.pdfIn PDF document text
    • https://www.coconutlodge.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f0a2f28badb---nozopimudaz.pdfIn PDF document text
    • http://ekachaiguitarist.com/ckfinder/userfiles/files/82623575151.pdfIn PDF document text
    • https://wscnaturalhealings.com/wp-content/plugins/super-forms/uploads/php/files/1bcb6ea765f8d0e5c06518b48a204568/76665442935.pdfIn PDF document text
    • https://www.unicodesystems.com/wp-content/plugins/super-forms/uploads/php/files/ee8sfk4urb33hltsa1kj9pu6n4/30120136054.pdfIn PDF document text
    • https://autoprofi.ua/userfiles/file/70837308342.pdfIn PDF document text
    • http://www.hptindia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160780138690de---tadanorogoporisoba.pdfIn PDF document text
    • https://mithermomix.com.mx/wp-content/plugins/super-forms/uploads/php/files/eb3ee5ee314e2bba7ee298f726ae6993/dulikipod.pdfIn PDF document text
    • http://hungthanhauto.com/luutru/files/77986071203.pdfIn PDF document text
    • https://allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/e8c876b7138a21a66b67b43589da2fc5/puwovumiwanupewoxiwapixi.pdfIn PDF document text
    • http://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/16072f2e9e55cf---pikexeduveran.pdfIn PDF document text
    • http://www.gainerwindows.ca/wp-content/plugins/super-forms/uploads/php/files/5esaqlb1ou525ng92ba4r0k480/72000573061.pdfIn PDF document text
    • https://aftaplan.com/works/peepsparty/html/upload_files/file/72995208537.pdfIn PDF document text
    • http://in-dapt.com/wp-content/plugins/formcraft/file-upload/server/content/files/160785b21d65b8---losasuzujetegupefotufiwaf.pdfIn PDF document text
    • https://jollytime.ru/wp-content/plugins/super-forms/uploads/php/files/ba7630fddeabc53d1c1d760475566044/50962102136.pdfIn PDF document text
    • https://www.3dreamchurch.com/wp-content/plugins/super-forms/uploads/php/files/e050990c8463e3a1d989751a58ae8213/tadufotewekisopenu.pdfIn PDF document text
    • http://oreade-breche.fr/userfiles/file/kaxarozosotikofanipibok.pdfIn PDF document text
    • https://xn--p3t29jo1ed4o4xw.tw/upload/files/kanizuxesaxipodojumo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=the+oxford+handbook+of+religious+conversionPDF 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_off00011f92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F92 11120 bytes
SHA-256: 8798056554cd6c2ea535343c740a0a5217b62429dd97a1e7438735b1ea4601ab
font_01_sfnt_off00013947.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13947 16784 bytes
SHA-256: 9d5ee02d47ed2b947d9aa918e227ed5a9e88e3ca286cd3aefa7839b429af157c
font_02_sfnt_off000164ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x164AE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1