Malicious PDF — malware analysis report

Static analysis result for SHA-256 66f7325287237387…

MALICIOUS

PDF

91.0 KB Created: 2021-06-28 03:36:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: fa88d69978dcd03343b2edecdb4dd60f SHA-1: b4dc5698b2ca66ae178772a28adb465b8f78894f SHA-256: 66f73252872373878b5970a1e64799ab5906d14a0749f474ac24d55111d93dd1
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF was flagged by ClamAV as 'Pdf.Phishing.Trojan'. Heuristics indicate it functions as a link farm, with many URLs pointing to compromised WordPress sites or disposable hosting. The embedded URLs are designed to redirect users to potentially malicious content, aligning with phishing or SEO-based malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://uticahighclassof78.com/clients/8/89/89c70e22fe5ad1405280b455f64975d7/File/48554687610.pdf In PDF document text
    • https://nam.it/wp-content/plugins/formcraft/file-upload/server/content/files/160aa5f7920e7b---miveritomotasolagaruzen.pdfIn PDF document text
    • http://thefutureofgolf.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160a5683e7d527---xuwegajufalepodavogawi.pdfIn PDF document text
    • https://www.rydalmereprestige.com.au/wp-content/plugins/super-forms/uploads/php/files/041d3jh0uapdm2krr1h8ndmjvq/darasefolepudomewil.pdfIn PDF document text
    • https://daleel.global/wp-content/plugins/super-forms/uploads/php/files/vnh7frs1a4ma094gbr1bfads8p/tixasibekupagom.pdfIn PDF document text
    • https://flycam.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1607987e7eca71---24037772026.pdfIn PDF document text
    • http://www.idenet.net/wp-content/plugins/formcraft/file-upload/server/content/files/160c2ddbd8cb61---11588167083.pdfIn PDF document text
    • https://stcatherine.ac.ug/wp-content/plugins/formcraft/file-upload/server/content/files/1606c9b899554e---19218550921.pdfIn PDF document text
    • http://www.farparts.cl/wp-content/plugins/formcraft/file-upload/server/content/files/160aea35309d71---8896997665.pdfIn PDF document text
    • https://www.cukoyem.com.tr/wp-content/plugins/super-forms/uploads/php/files/bp3nlou66fv1s3ims0voftkne4/magekurinozofexor.pdfIn PDF document text
    • http://sns-russia.ru/userfiles/file/zejonovuwidixogaje.pdfIn PDF document text
    • http://graphicon.hu/wp-content/plugins/formcraft/file-upload/server/content/files/160788d4acbf52---62607193525.pdfIn PDF document text
    • http://bjzjygj.com/fckeditor/editor/filemanager/connectors/php/userfiles/file/bepudulorojuwefisab.pdfIn PDF document text
    • https://www.andyselfstorage.co.uk/wp-content/plugins/super-forms/uploads/php/files/7dvp4t89ouu5ufvpm8bo4ktouj/kipogazagosipug.pdfIn PDF document text
    • http://www.johnknox.ch/wp-content/plugins/formcraft/file-upload/server/content/files/16090d2387d521---63330323725.pdfIn PDF document text
    • https://anandamsanyal.com/userfiles/file/18257066093.pdfIn PDF document text
    • http://mujuerp.com/uploads/ckeditor/files/20210608223000.pdfIn PDF document text
    • http://www.asejnrtigers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160af8e174d3e8---75899646680.pdfIn PDF document text
    • http://sushi-belovo.ru/files/bovipowaxodegigimexabi.pdfIn PDF document text
    • https://artenika.pl/fck/file/96808692360.pdfIn PDF document text
    • http://cartopack.com/Images/file/12106960739.pdfIn PDF document text
    • http://ventilyatsia-v-sochi.ru/ckfinder/userfiles/files/pazuzusikov.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=most+common+site+of+carcinoma+pancreasPDF 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_off00010232.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10232 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011a49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A49 10588 bytes
SHA-256: 03d64b6db99f3702707d4f65856d4f0be1931cd61c3a4e056ab312fd166e4631
font_02_sfnt_off00013276.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13276 16960 bytes
SHA-256: 423badc01b83dc9b0c6743dc4a1ebea048171cf31499d539251e8dc9d891378b

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