Malicious PDF — malware analysis report

Static analysis result for SHA-256 b5e2baba7b9384ef…

MALICIOUS

PDF

93.2 KB Created: 2021-07-19 13:48:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e34bf71e38baf5579b5f73be71330e9d SHA-1: bf5a4c532598f34955f8ae3ad02f1d969269373a SHA-256: b5e2baba7b9384ef9a67267914bb19652809320034aa3e24b1bb479ca8e74cc7
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links pointing to compromised websites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. While no scripts were explicitly extracted, the structure and URL patterns are indicative of a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://www.louthadventures.ie/wp-content/plugins/formcraft/file-upload/server/content/files/1606cbe4cc9faf---wulufaxo.pdf
    • http://ambvetsanprospero.eu/userfiles/files/19956755403.pdf
    • https://elpmarketing.ca/wp-content/plugins/super-forms/uploads/php/files/fffe02156120b4be574a5ed43d8eb5da/90369697528.pdf
    • https://cpsguffanti.com/uploads/file/5286025112.pdf
    • https://pfgmm.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608c0095a225b---nafegibokiduzujuras.pdf
    • https://www.asahinafunnels.com/wp-content/plugins/super-forms/uploads/php/files/d3a774vva5d1rkkofra41vli2r/kefasivud.pdf
    • http://www.dfdtrading.sk/ckfinder/userfiles/files/mukuritar.pdf
    • http://cloverpark1961.com/clients/6/6a/6a73a08bb68f643008adb5efbbb44e43/File/77213591010.pdf
    • http://www.sparkprototypes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b6f56348ce4---niweperiritajuwo.pdf
    • https://floridaholidayplanner.com/wp-content/plugins/super-forms/uploads/php/files/13be1dfb7f79a857dc78894d59858804/dalonax.pdf
    • https://www.nobleorthodontic.com/wp-content/plugins/super-forms/uploads/php/files/f379fd5eee534daddca7f5b51f225ef6/7454693720.pdf
    • http://giustizianuova.it/userfiles/file/rofajoriborinonirodinori.pdf
    • https://www.mclarenpress.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070d4861612c---sobejo.pdf
    • http://bsbcarpet.com/userfiles/file/kifedulemo.pdf
    • https://247hvac.ca/fabulous1/uploads/files/tiwezepup.pdf
    • https://aeap.com.br/ckfinder/userfiles/files/22795903499.pdf
    • https://mission4recruitment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bfc1a38cacc---68238517786.pdf
    • https://www.prowallpanama.com/wp-content/plugins/super-forms/uploads/php/files/05982925e23736ae9760da9a6f2908a4/15827737339.pdf
    • https://actioncoach.com.my/wp-content/plugins/formcraft/file-upload/server/content/files/1609fb0dfb265a---numivaroribelup.pdf
    • http://sistersaviopublicschool.com/userfiles/file/losujotusekaxajusunaguxap.pdf
    • https://www.lightingdynamics.com/wp-content/plugins/super-forms/uploads/php/files/bc440833394a63eec89bde9a2eadae72/gelamozefedixepilu.pdf
    • https://viajespereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092e4cf6e970---dakidesijobixamanixaxidab.pdf
    • http://www.danvillern.com/wp-content/plugins/super-forms/uploads/php/files/gp3pt7hcoehrjb15h8dv0m9r97/86516276736.pdf
    • http://wxjsyd.com/userfiles/files/pimugavikal.pdf
    • https://3dreamvr.com/wp-content/plugins/super-forms/uploads/php/files/b52da24dbd20f00333d512cb62fc329b/43562798513.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=differences+between+have+to+and+must
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001085d.bin
15f3a3587885a9577ff3031851a5ce51b75a8945c37d239ecbcec238fb09c8b4
pdf-font-stream PDF embedded font (sfnt) at offset 0x1085D 16696 bytes
font_01_sfnt_off000133aa.bin
1bcfca90c405048d425059f6de7f92393148928f19652c40a14d0b4111bb190d
pdf-font-stream PDF embedded font (sfnt) at offset 0x133AA 11088 bytes
font_02_sfnt_off00014d79.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x14D79 16792 bytes