Malicious PDF — malware analysis report

Static analysis result for SHA-256 887a95c37ad8579c…

MALICIOUS

PDF

94.9 KB Created: 2021-08-30 05:11:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-16
MD5: eba2f6de7dc617b444d9dbdb20cd30f7 SHA-1: 6c710df7cf97460621f4b0ccbf1f32c4e2e09477 SHA-256: 887a95c37ad8579c09f536a525150480b73b028d6c9a053357e6c90e473c1a50
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous links, many of which point to websites that appear to be compromised or are hosted on disposable domains, suggesting a link farm or phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a phishing or redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

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://valleypainclinic.org/userfiles/file/fuxowoketudotozuzemomuxus.pdf In PDF document text
    • https://palezieux.com/ckfinder/userfiles/files/deregelagovape.pdfIn PDF document text
    • https://mamproducciones.es/wp-content/plugins/formcraft/file-upload/server/content/files/160af66d2c0efb---zanenupakukak.pdfIn PDF document text
    • http://bascobrunswick.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608b80ef9b5fc---jelorowiwenubememutagega.pdfIn PDF document text
    • http://drsuthichai.com/userfiles/files/40477309611.pdfIn PDF document text
    • http://cooperclassof1970.com/clients/9656/File/zevujoradeserepa.pdfIn PDF document text
    • https://f27szerviz.hu/upload/files/vesilivinefegoseba.pdfIn PDF document text
    • http://www.shipsupply.co.mz/wp-content/plugins/formcraft/file-upload/server/content/files/1609b0900d4548---67861731633.pdfIn PDF document text
    • http://elazentrale.de/images/uploaded/file/59546878688.pdfIn PDF document text
    • http://cetinelektrik.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160f31bb025f0d---25049885490.pdfIn PDF document text
    • https://exxontel.com/file/40426995074.pdfIn PDF document text
    • https://holzhaus-suedtirol.it/wp-content/plugins/formcraft/file-upload/server/content/files/160ec4ca2ad4ea---koxolelimig.pdfIn PDF document text
    • https://kawanmto.net/contents//files/9898793706.pdfIn PDF document text
    • https://senzedigicraft.com/wp-content/plugins/super-forms/uploads/php/files/20df586a707bfaaca4d942aabb79a9e4/gijiwor.pdfIn PDF document text
    • http://stalmont.eu/userfiles/file/11608133859.pdfIn PDF document text
    • http://eduomania.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086fcfcd24b8---34488374936.pdfIn PDF document text
    • https://purebodycare.courses/wp-content/plugins/super-forms/uploads/php/files/tnmpnj2bfm0sdbbo8bcfjr9ujj/83536988921.pdfIn PDF document text
    • http://kino-profi.com/wp-content/plugins/super-forms/uploads/php/files/84621dd36a5fed8579cbe65d1411003a/4583842396.pdfIn PDF document text
    • http://www.viksexteriors.com/wp-content/plugins/formcraft/file-upload/server/content/files/161138e8bbbd29---13603457619.pdfIn PDF document text
    • http://fkhd.cz/data/img/12039101765.pdfIn PDF document text
    • http://bluecars.pl/userfiles/file/23525234390.pdfIn PDF document text
    • https://diversifiedhumansolutions.com/wp-content/plugins/super-forms/uploads/php/files/756cbd3495dea495ba687373a210c62d/31739224745.pdfIn PDF document text
    • https://culturasiapamplona.com/guiarte_userfiles/files/65690590956.pdfIn PDF document text
    • https://genesisbehaviorcenter.com/wp-content/plugins/super-forms/uploads/php/files/6e71f3df6d2af9c1455154bd40aa0824/xaxojusugevoriraviditito.pdfIn PDF document text
    • https://sipare.com.ar/wp-content/plugins/super-forms/uploads/php/files/2l424phrtsem1ctmjpiin41eg0/rebuforenikomif.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=psychic+research+and+modern+physics+russell+targPDF 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_off00010bee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BEE 18108 bytes
SHA-256: 3a82c40fc26eb109155e03e9647dd16a2fda459924824b1e5488f7fe3ecac645
font_01_sfnt_off00013a8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A8D 11176 bytes
SHA-256: 54d172006c89cc5a5cb37f6eb2231b22df443ea9a21eb9eba52c65f7e286ed11
font_02_sfnt_off00015454.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15454 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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