Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7efd483014b0a53…

MALICIOUS

PDF

87.9 KB Created: 2021-09-21 08:22:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 7fa0835fb5a949d2014bc3b0cca2a38a SHA-1: 9929ba2145ef71d1fcbdb87ce6e99e8af8613e70 SHA-256: d7efd483014b0a53c3bdc734e09d0264222a1445c40796f8f456009b0d57c76c
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to compromised CMS uploads and disposable hosting, indicating a link farm designed for phishing or malware distribution. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or exploitation.

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://camelcarpet.org/d/files/94400694626.pdf In PDF document text
    • http://zoekidsworld.com/userfiles/file/33965873044.pdfIn PDF document text
    • https://wscnaturalhealings.com/wp-content/plugins/super-forms/uploads/php/files/63823d4abf0b4742911c938daee60fa1/91271180846.pdfIn PDF document text
    • http://miroslaws.com/ckfinder/userfiles/files/duvotexalenidelefagetuv.pdfIn PDF document text
    • http://acsalma.hu/userfiles/files/norasafabebeb.pdfIn PDF document text
    • http://studiopiergentili.it/userfiles/files/98700044775.pdfIn PDF document text
    • http://ramenzoni.eu/userfiles/files/xotifuvano.pdfIn PDF document text
    • http://zhodnoceni-penez.cz/is/images/FCKeditor/File/dotozezegoxefomutugik.pdfIn PDF document text
    • http://jshtextile.com/UserFiles/file///27993209365.pdfIn PDF document text
    • https://economiadecomunion.net/ckfinder/userfiles/files/fitatefixopipapemefabiji.pdfIn PDF document text
    • http://andreevmag.com/wp-content/plugins/super-forms/uploads/php/files/464a50780ad9756e8c7836daa747ac4d/suxebimulawasijawolapusiw.pdfIn PDF document text
    • http://studiotecnicopetrillo.eu/userfiles/files/69931886300.pdfIn PDF document text
    • http://cheapmarkt.com/userfiles/file/tazuporafigigitu.pdfIn PDF document text
    • https://pikhospital.com/ck_uploads/uploads/files/44258384247.pdfIn PDF document text
    • http://car-zone.sk/data/data/file/54102922385.pdfIn PDF document text
    • http://www.etoiles-recrutement.com/wp-content/plugins/formcraft/file-upload/server/content/files/161390913b7389---32157161164.pdfIn PDF document text
    • https://cicasoftavukatwebsitesi.demowebsiteleri.com/upload/files/50124015214.pdfIn PDF document text
    • https://moyaexpresss.com/ckfinder/userfiles/files/26384762808.pdfIn PDF document text
    • https://kingbakerypans.com/userfiles/file/72796384666.pdfIn PDF document text
    • http://speednewslive24.com/assets/ckfinder/core/connector/php/uploads/files/80267891846.pdfIn PDF document text
    • https://www.energetisch-therapeut-estie.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1613b70f34a772---19023855327.pdfIn PDF document text
    • http://sjhrz.com/images/upload/File/40688988300.pdfIn PDF document text
    • https://uzmanwebci.com/calisma2/files/uploads/56205037545.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=best+offline+games+under+200mbPDF link annotation
    • https://mediaget.com/userfiles/files/zemuwudulifimavipu.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f2f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2F1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010b08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B08 11232 bytes
SHA-256: ec5a528f314b82e0465454b43775810b8cae9eec955bd1c0b7cbc19d26f1139e
font_02_sfnt_off0001252b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1252B 17168 bytes
SHA-256: d06962e27a0cf9658eae71cc2a725485dc6fe918eb359d0e40d08156d1f98c42

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