Malicious PDF — malware analysis report

Static analysis result for SHA-256 75aa4293de107588…

MALICIOUS

PDF

85.8 KB Created: 2021-07-17 17:00:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: c71e392c8a8481a3d361d75dc5fc302a SHA-1: 0715906279495ae22c3ca44a87134d5d5776e4b8 SHA-256: 75aa4293de107588b6dc48d6d110cbc5d45bd122237c251a0b6968b5968f9e9a
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised WordPress sites, indicating a link farm or redirection scheme. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or distributing further malware. The presence of multiple external URIs and link farms points towards an attempt to manipulate search engine results or redirect users to malicious destinations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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://reclaimsplus.com/wp-content/plugins/super-forms/uploads/php/files/7bd1c64d16c5657524ed77f75f401920/fikaseriwap.pdf In PDF document text
    • http://imcborivali.org/userfiles/file/75857380915.pdfIn PDF document text
    • https://baconbites.com/wp-content/plugins/super-forms/uploads/php/files/mqn28lurr0oqdklc8qjh5m7e00/27715796695.pdfIn PDF document text
    • https://aarhuskortet.dk/images/file/nezojilavobenofazozusor.pdfIn PDF document text
    • https://backcountryplayground.com/wp-content/plugins/super-forms/uploads/php/files/2bb43f8e203a391fa12cc57a2ad8970e/12889730952.pdfIn PDF document text
    • https://personalloan2u.com/wp-content/plugins/super-forms/uploads/php/files/35253489e78f81fcc48f1833074e148e/wakijafe.pdfIn PDF document text
    • https://www.hadlowsecurityshutters.com/wp-content/plugins/super-forms/uploads/php/files/02cae3c7a145ac3ef2b8d344d1e56187/69179399593.pdfIn PDF document text
    • http://curry-box-deluxe.de/userfiles/file/42631020966.pdfIn PDF document text
    • http://playfromhome.org/clients/4/49/49939bf6a151252ba1adfe53d1befa29/File/94469650575.pdfIn PDF document text
    • https://www.audifonosdoshoydos.com/wp-content/plugins/formcraft/file-upload/server/content/files/160988cf09caae---xijutileziw.pdfIn PDF document text
    • http://aeronautike.com/userfiles/file/25778269550.pdfIn PDF document text
    • https://avenirpourtous.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160836214bc1d2---33402591956.pdfIn PDF document text
    • https://lion-trading.co.uk/wp-content/plugins/super-forms/uploads/php/files/uvrt79rjk14tn3d997b5i9dcqu/13638868696.pdfIn PDF document text
    • http://bocghebinhduong.com/media/ftp/file/99234826829.pdfIn PDF document text
    • https://rosycaffe.com/file/67810223602.pdfIn PDF document text
    • https://cavalier-hundezucht.ch/userfiles/file/43711069004.pdfIn PDF document text
    • https://masterok-kovka.ru/wp-content/plugins/super-forms/uploads/php/files/e0dc0eda42f5a85687ef4462d221aa21/vijup.pdfIn PDF document text
    • https://www.phoenixdentalacademy.co.uk/wp-content/plugins/super-forms/uploads/php/files/6ae3019e928ec8663c5fd5ab79d37c0a/mibarenelapetul.pdfIn PDF document text
    • http://aj-freight.com/ckfinder/userfiles/files/fizijixofep.pdfIn PDF document text
    • http://medica-eg.com/userfiles/file/65416017100.pdfIn PDF document text
    • https://drivingschoolofnorthtexas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cf1550b083---47510873886.pdfIn PDF document text
    • http://lookupagency.es/wp-content/plugins/formcraft/file-upload/server/content/files/1607f09b38b65e---fugopidemetewujuku.pdfIn PDF document text
    • http://lookupagency.es/wp-content/plugins/formcraft/file-upload/server/content/files/160ab65d8efac0---55119049282.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=parathyroid+tumor+in+dogsPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC15 16972 bytes
SHA-256: bab0da95868ce5fe40681fcb33b22c6f196f08fd27faf36fe2d7d0b110aab169
font_01_sfnt_off00011845.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11845 10732 bytes
SHA-256: 9e0a49d98702c73ff15b2ee43fe61ef5699de8dbb2ca4bec4aae4d25ed5e600f
font_02_sfnt_off00013090.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13090 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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