Malicious PDF — malware analysis report

Static analysis result for SHA-256 65e4c7080a9927d8…

MALICIOUS

PDF

81.4 KB Created: 2021-09-06 00:07:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: d78fe5efd59044c180aa2de36df07f91 SHA-1: 395181d0acfc77d46bdec94e613e9dddb64c7f77 SHA-256: 65e4c7080a9927d8c9e03c293a2c1f94dd8aedd8462296100d3a0059de0f62eb
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is a PDF containing embedded JavaScript and multiple links, several of which point to compromised WordPress sites. The presence of a 'callback phishing phone lure' heuristic and the ML classifier's high confidence score indicate a malicious intent, likely to trick users into visiting malicious links or engaging with fraudulent phone calls. The embedded JavaScript is likely used to further the malicious activity, such as redirecting the user or downloading additional payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

Heuristics 8

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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.allatpatikapecs.hu/images/file/65303662195.pdf In PDF document text
    • http://oikoscoccatoarchitettura.com/userfiles/files/jibirivemofulidanasufus.pdfIn PDF document text
    • https://brawlcall.com/ckfinder/userfiles/files/93338074429.pdfIn PDF document text
    • http://ajmason.com/admin/ckfinder/userfiles/files/jagowidorigi.pdfIn PDF document text
    • https://goldenparadisestsimons.com/wp-content/plugins/super-forms/uploads/php/files/734f06332e092e0e5bdf6c7692ec0d52/radorunexoxodaj.pdfIn PDF document text
    • https://remoteworkerclub.com/wp-content/plugins/super-forms/uploads/php/files/3edd4f2ad6669678cd1a91ce2903f86b/wedukovuk.pdfIn PDF document text
    • https://www.getfitcrew.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bc1714a441---rivuba.pdfIn PDF document text
    • http://cuboni.com/uploadfile/hong202106202318101816.pdfIn PDF document text
    • http://alvitraders.com/files/37515225070.pdfIn PDF document text
    • https://www.karenlovelee.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606e57633b93c---31138459967.pdfIn PDF document text
    • http://xn--80aab8aioy.xn--p1ai/userfiles/file/74291383275.pdfIn PDF document text
    • http://uppercanadatwocylinderclub.com/clients/877835/File/rivafikiferumuvuridedagij.pdfIn PDF document text
    • http://ud2-140.com/files/lurolufofaniwixo.pdfIn PDF document text
    • https://www.harnoordesigns.com/wp-content/plugins/super-forms/uploads/php/files/niqqnj1qlfhrkndh8kiuqmotu7/zewufev.pdfIn PDF document text
    • https://giritrademark.com/content_files/files/tixiwar.pdfIn PDF document text
    • http://swiss-ex.com/images/blog/file/93158569164.pdfIn PDF document text
    • https://tirthmobile.com/wp-content/plugins/super-forms/uploads/php/files/h05hej0kukpn3gni1qfbl26a6f/suxuwiradujifo.pdfIn PDF document text
    • http://grandp.ru/userfiles/file/66305146330.pdfIn PDF document text
    • http://smepil.com/ckeditor/userfiles/files/33645362575.pdfIn PDF document text
    • http://www.vitrierbxl.be/wp-content/plugins/formcraft/file-upload/server/content/files/160ddeb9a1e121---45782217809.pdfIn PDF document text
    • https://warungmimpishio.com/contents//files/331988939.pdfIn PDF document text
    • http://pazzo.jp/js/upload/files/jegijaranuxako.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=gta+5+lspdfr+best+calloutsPDF 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_off0000d763.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD763 10828 bytes
SHA-256: 2dd9179c516c5e8971096db236a7bbde997a604ab47df977d2aaadabf287d410
font_01_sfnt_off0000f066.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF066 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010878.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10878 18204 bytes
SHA-256: 9635259821c04ab97f4aaf008c2363f354a244201108239a3021e13c141ee847

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