Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1ed7d6dfaa5541e…

MALICIOUS

PDF

77.9 KB Created: 2021-09-02 23:25:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 57e27ab62d9a952689f958899b0b686c SHA-1: b8a87d4c8b6cae093dceab1cc1f3100e8622cd04 SHA-256: f1ed7d6dfaa5541e1889a5b2c9386cab21bd58fa6808161750a327782807090c
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 domains, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malicious PDF lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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://wastran.ru/uplcv?utm_term=statistics+exercises+with+answers+pdf PDF link annotation
    • https://2ruoteexpo.it/ckfinder/userfiles/files/zavovizu.pdfIn PDF document text
    • http://ffarchitettura.it/userfiles/files/23114071926.pdfIn PDF document text
    • http://liddellgaryfamily.com/clients/863293/File/kixixewudujavexedin.pdfIn PDF document text
    • http://1-cities.com/blog_images/blog_/file/wajekeni.pdfIn PDF document text
    • http://mouaumfb.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c6e07db6c35---luxupitudijelixu.pdfIn PDF document text
    • http://abapaposentados.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16078c2b9cf4c7---jeburizafamizuvuduras.pdfIn PDF document text
    • https://www.ayersworthglen.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606eaf4040d47---revusa.pdfIn PDF document text
    • http://pmdrecycling.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606da8816e04c---lopagetilidaporezawagad.pdfIn PDF document text
    • http://www.redactordecontenidos.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1608dc90903347---38382455687.pdfIn PDF document text
    • http://www.oschouston.com/osc/wp-content/plugins/formcraft/file-upload/server/content/files/160e7aa1dca44b---tizabatem.pdfIn PDF document text
    • http://wrtour.com/FileData/ckfinder/files/20210822_AB5BFB3EAA4EBD9E.pdfIn PDF document text
    • https://hattoco.vn/images/ckeditor/files/2894385103.pdfIn PDF document text
    • https://homini.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1609d4abd55a08---1383519505.pdfIn PDF document text
    • http://ecole-belair.com/ecole/file/petenikebomadoduna.pdfIn PDF document text
    • http://cerrutistudio.eu/userfiles/files/52855144138.pdfIn PDF document text
    • http://mirandatutoringcentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a5e9bf9f9c2---91772047941.pdfIn PDF document text
    • https://anup.bo/images/files/85020291770.pdfIn PDF document text
    • https://bearings.vn/images/ckeditor/files/mexuwe.pdfIn PDF document text
    • https://air-separation-supplier.com/d/files/91883950714.pdfIn PDF document text
    • http://www.sanjuktabanerjee.com/fckimages/file/deritapojizekibigofolos.pdfIn PDF document text
    • https://hrmconsulting.biz/upload/files/32994360275.pdfIn PDF document text
    • https://poldercuptrofee.nl/site/admin/ckfinder/userfilesfiles/xuxadagakeb.pdfIn PDF document text
    • 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_off0000cac9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCAC9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e2db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2DB 17628 bytes
SHA-256: 30ffe05a422dc9212e8677353d75f6a8c054ad22dfe94f7aea9936ea1586bd21
font_02_sfnt_off000110df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110DF 10812 bytes
SHA-256: 451f1d19233b0d21944c3868d472be8630ea8f1a94bef1ad4b99e04c75152e01

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