Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e11fd0375079488…

MALICIOUS

PDF

96.2 KB Created: 2021-08-09 05:45:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: b3850f4ab838e989e888e8cb8dbe177a SHA-1: 9af5de568dfa39ac777a1877160be4ce2f408121 SHA-256: 3e11fd037507948899a3a44693319def259b0144e1f996e6be835778cf5b978c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable hosting, indicating a link farm or SEO manipulation tactic. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://grafitpoint.ru/wp-content/plugins/super-forms/uploads/php/files/ab4048ffdb9c7e37dc17c84d6765b2c7/61504364404.pdf In PDF document text
    • https://nhorizontours.com/userfiles/files/wigukonusog.pdfIn PDF document text
    • http://parkwestresidences.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077a49830a06---nazemapixerokiroz.pdfIn PDF document text
    • http://mesotects.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087ef8e5bf01---rilovesefopokofiv.pdfIn PDF document text
    • http://famillespourstarlight.com/clients/a/a9/a9b42c05011d3bb27e7f7ec2ed30324f/File/36938686186.pdfIn PDF document text
    • http://sewakendragroup.com/userfiles/file/82991668468.pdfIn PDF document text
    • http://www.bluewhaleline.com/image/upload/File/gujesovilenupidu.pdfIn PDF document text
    • https://bancodevida.com/bancodevida/admin/images/image/file/rawowufufarovu.pdfIn PDF document text
    • https://vibanghanoi.com/uploads/files/dobojonajifij.pdfIn PDF document text
    • https://drivingschoolofnorthtexas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9bc2353a1a---54470034932.pdfIn PDF document text
    • http://iccj.jp/images/uploads/fckeditor/file/neduxi.pdfIn PDF document text
    • http://knowleangling.co.uk/ckfinder/userfiles/files/61339402777.pdfIn PDF document text
    • http://scandirent-new.ru/uploads/assets/file/gupixusepasajinudezam.pdfIn PDF document text
    • https://sketchup360.vn/wp-content/plugins/super-forms/uploads/php/files/oiteava94u8rfvfvrstdi9h5mg/49318289271.pdfIn PDF document text
    • https://amadesafar.ir/basefile/amadesafarir/files/xinejerunifusin.pdfIn PDF document text
    • https://www.sussexweddingservices.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1608d18b3e9df6---84043781616.pdfIn PDF document text
    • https://drmiamiconnect.com/wp-content/plugins/super-forms/uploads/php/files/0ee1dbf2615cd1acb427f1d44f077850/1076647728.pdfIn PDF document text
    • https://wemservice.com/ckfinder/userfiles/files/18326082253.pdfIn PDF document text
    • https://ebooksweb.net/files/file/wotizuv.pdfIn PDF document text
    • https://livingcircles.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160947d0fa50ea---vakimumavilavodefojo.pdfIn PDF document text
    • http://xn--3e0b556bhrbowi6undva.com/ckupload/files/40871717808.pdfIn PDF document text
    • http://hawks79.com/clients/85064/File/69650192017.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=how+to+mount+tcl+roku+tv+on+the+wallPDF 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_off00011359.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11359 17212 bytes
SHA-256: 8ef62e9660fb0e5f421afa90c53b9318ff459797776a628e511b274dbd63b4d2
font_01_sfnt_off00014010.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14010 10568 bytes
SHA-256: 6c7555b4da78fe693959381e57e18a4a6f098aada5f97100c52e0d8705f24f4f
font_02_sfnt_off00015803.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15803 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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