Malicious PDF — malware analysis report

Static analysis result for SHA-256 01fdd4f4a41b3a71…

MALICIOUS

PDF

76.0 KB Created: 2021-09-01 13:45:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: fb2a68d522c64032087af668ab3a7243 SHA-1: aee56b356532fb20216cb3bbd8411f5072820671 SHA-256: 01fdd4f4a41b3a717b5a7ed79baa437ef14ed2df1997a93a51143fe698773cd0
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links to other PDF files hosted on various domains, many of which appear to be compromised or disposable. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or distributing further malware. The document body is heavily obfuscated and unreadable, providing no direct content clues.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://ranagro.com/files/3234007183.pdf In PDF document text
    • http://lussoleathertiles.com/test4/EDITOR/example/v2/userfiles/file/84076814145.pdfIn PDF document text
    • http://www.realisthotel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b7545bb78e---11744473150.pdfIn PDF document text
    • https://grafitpoint.ru/wp-content/plugins/super-forms/uploads/php/files/a048bb80e437817d23be1394a66c3b8c/lozexek.pdfIn PDF document text
    • http://gowowdeli.com/uploads/files/fupegekuxi.pdfIn PDF document text
    • http://bamt.be/wp-content/plugins/formcraft/file-upload/server/content/files/160abe709b7738---29551324894.pdfIn PDF document text
    • http://goteneplast.se/files/images/file/wabakogetituver.pdfIn PDF document text
    • http://archpiudue.com/userfiles/files/12701945221.pdfIn PDF document text
    • http://uticahighclassof78.com/clients/8/89/89c70e22fe5ad1405280b455f64975d7/File/zelotuvonelularoson.pdfIn PDF document text
    • http://ahlhy.com/uploads/file/091917481501.pdfIn PDF document text
    • https://earthideasawnings.com/wp-content/plugins/formcraft/file-upload/server/content/files/16109316967077---zoxezodekabaginef.pdfIn PDF document text
    • http://kursadowicz.pl/Upload/file/81781334065.pdfIn PDF document text
    • https://simplehome.ro/ckfinder/userfiles/files/43925036359.pdfIn PDF document text
    • https://heykidsletscook.info/wp-content/plugins/super-forms/uploads/php/files/2a820e9735d41bac4536ef2a11b838c2/dakibavisama.pdfIn PDF document text
    • https://www.mclarenpress.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ab9cc08a5a---vesemesapexokure.pdfIn PDF document text
    • https://stef-nancy.fr/upload/document/65223297166.pdfIn PDF document text
    • http://akinmedikal.com/uploads/file/82764858378.pdfIn PDF document text
    • http://www.cascinasorigherio.it/wp-content/plugins/formcraft/file-upload/server/content/files/1609b7f017a300---turiga.pdfIn PDF document text
    • http://hoitruyengiaocodocvietnam.com/uploads/image/files/zajomijofexojoguzexidar.pdfIn PDF document text
    • https://storage-in-motion.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e4a5bc28928---wozasuladekotuzovifipex.pdfIn PDF document text
    • https://www.vigo.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160983f624f49d---rolikonigipukamili.pdfIn PDF document text
    • https://www.tanyadantus.com/wp-content/plugins/super-forms/uploads/php/files/62b150bad3d7e8cfaa638b9eca1926b0/69729074952.pdfIn PDF document text
    • http://abwpetersburg.com/uploads/files/74742428216.pdfIn PDF document text
    • https://refour.eu/wp-content/plugins/super-forms/uploads/php/files/b58eba9b08c18ec7639fd6cec0349f85/kixolugetuteworuga.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=rectilinear+motion+problems+and+solutions+pdfPDF 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_off0000c050.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC050 11064 bytes
SHA-256: d7dcbbeb57f370171321e1cc4226eaa7f1c9d0dbfd1471679f1caab516f69490
font_01_sfnt_off0000d9d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9D3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f1e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1E5 19108 bytes
SHA-256: c96bbe7163be68a3532aca5bd9d113028be503a8739a108cd5100954c045c172

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