Malicious PDF — malware analysis report

Static analysis result for SHA-256 c4e8697cd5bb06ab…

MALICIOUS

PDF

89.4 KB Created: 2021-06-29 15:52:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 5e3104a996b719b5d5d3de22954f328e SHA-1: bb99ac15ef2b647b79e92f2d75a55d9fb7bf2223 SHA-256: c4e8697cd5bb06ab72e29682a75a04a63092c6d22b24c766b3edfd964c8377dc
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains numerous embedded URLs pointing to compromised WordPress sites and other disposable hosting, suggesting it functions as a link farm to distribute malicious content or conduct phishing attacks. No scripts were extracted from this sample, but the extensive use of external links indicates a clear intent to redirect the user to potentially harmful destinations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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://irlanc.ru/uplcv?utm_term=a+parallel+plate+capacitor+of+capacitance+c+is+connected+to+a+battery PDF link annotation
    • http://modelkyujin.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607153d57ea20---revatowoputet.pdfIn PDF document text
    • https://www.gml.de/wp-content/plugins/formcraft/file-upload/server/content/files/160728f345fc7d---5234384097.pdfIn PDF document text
    • http://soldresold.com/Shradhdha-Mehra/soldresold/final/ckeditorimage/files/tuligabebikiburamaw.pdfIn PDF document text
    • https://vibangthuaphatlai.net/uploads/files/52059404014.pdfIn PDF document text
    • https://protechlighting.com/wp-content/plugins/super-forms/uploads/php/files/42d704bcb557464aa337a57daba1762c/32081140614.pdfIn PDF document text
    • https://oddluzanie.net/userfiles/file/fozevotalogepubitukolu.pdfIn PDF document text
    • http://teaandtiarasottawa.com/clients/e/e8/e8f54e69a7463df9fd0adff13cd8e90f/File/19454061578.pdfIn PDF document text
    • http://ever-pioneer.com/upload/files/18154227589.pdfIn PDF document text
    • http://119hero.kr/userData/board/file/75431063535.pdfIn PDF document text
    • http://nwatchonline.net/userfiles/file/voxat.pdfIn PDF document text
    • https://parc-hotel.info/file/simemudibe.pdfIn PDF document text
    • http://middlegeorgiacoinclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e5ad614e0f---96222441016.pdfIn PDF document text
    • http://svatba-emi.com/uploads/pages/files/badugigizazoxupi.pdfIn PDF document text
    • http://www.hkwebdesign.com.hk/wp-content/plugins/formcraft/file-upload/server/content/files/16087a86ba2b3d---zunadegakijefadevi.pdfIn PDF document text
    • https://www.alertgy.com/wp-content/plugins/super-forms/uploads/php/files/f769ac47526f32473c3e213a22b780f9/doxaju.pdfIn PDF document text
    • https://vidolamerica.org/wp-content/plugins/super-forms/uploads/php/files/120dfeae79543649a84449b66e6fdf42/gogimimimawulutoluka.pdfIn PDF document text
    • https://www.mybizwebsites.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086557047452---gaburofekagaj.pdfIn PDF document text
    • http://gtshotel.it/images/file/72052692038.pdfIn PDF document text
    • https://jetzterstrecht.hamburg/wp-content/plugins/super-forms/uploads/php/files/rmc8c5q3f8gjt6umvftt5cscum/58504227985.pdfIn PDF document text
    • http://www.191seo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c9b15d075c2---kozalejezudigafuvuli.pdfIn PDF document text
    • https://www.hadlowsecurityshutters.com/wp-content/plugins/super-forms/uploads/php/files/6aee90e861b22e16702c2bd94a329bd1/jimulijafulekapomuxobit.pdfIn PDF document text
    • http://triatlonbizuterie.cz/sites/default/files/file/puvijinepunananosuloti.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_off0000f6fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6FB 18024 bytes
SHA-256: 40d4e9e2cb5411c3ec4eb4f3d750e219eaa5d500d2ff4fe3b04e948c204d0c4b
font_01_sfnt_off000126d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126D2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013ee9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13EE9 10848 bytes
SHA-256: ef6be1a741756cb96c489525f654e87417b48730f6472ea705a9435430f4fbb3

Open this report in the interactive analyzer, or submit your own file for analysis.