Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e40affa5b75b8b3…

MALICIOUS

PDF

84.5 KB Created: 2021-09-12 16:14:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: ca1105631311973e50b86ca727234c5e SHA-1: b6b5a2ea476dd8973d1ce1b48dfc0fa4d751cc1f SHA-256: 2e40affa5b75b8b3a78501ed53c6c2714b7db667fee095c8e036314173329996
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ML classifiers and ClamAV as malicious. It contains a large number of external URIs and link farm heuristics, indicating it is designed to redirect users to potentially harmful websites. The presence of 'utm_term' in one of the URLs suggests a phishing or SEO poisoning attempt to drive traffic to specific content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://huntic.ru/uplcv?utm_term=www+movierulz+vpn+download PDF link annotation
    • https://tyeetomsfishing.com/userfiles/file/73795276369.pdfIn PDF document text
    • http://trainternational.in/wp-content/plugins/formcraft/file-upload/server/content/files/1612f81f781744---pazipun.pdfIn PDF document text
    • https://euforbiabulgaria.gbinvest.net/uploads/pages/files/kewobefefenit.pdfIn PDF document text
    • http://eca.or.th/ckfinder/userfiles/files/purosipexik.pdfIn PDF document text
    • http://isystemlab.com/admin/ckfinder/userfiles/files/37579692948.pdfIn PDF document text
    • https://leicht-spb.ru/wp-content/plugins/super-forms/uploads/php/files/1504197309e8c8601760d6c9343ea6f9/59843841754.pdfIn PDF document text
    • http://ultraljud.nu/bild/files/25320597227.pdfIn PDF document text
    • https://h1t-url12shio-turbo.com/contents/files/4472989988.pdfIn PDF document text
    • https://indianhairtransplant.com/ckfinder/userfiles/files/guxepupepikuvijafogiz.pdfIn PDF document text
    • https://skywaynepal.com/userfiles/file/nefepud.pdfIn PDF document text
    • http://jedwines.com/cmsCart/upload/file/76991912678.pdfIn PDF document text
    • http://www.hydro-tg.pro/upload/file/22526659654.pdfIn PDF document text
    • http://palirna-frydek.cz/uploaded/file/xokejurakafovebaluv.pdfIn PDF document text
    • http://faw-asia.com/image/upload/files/2869896819.pdfIn PDF document text
    • http://ayurveda-shiatsu-nice.com/upload/files/fozorugafizaxakifujopi.pdfIn PDF document text
    • http://ebonit.light.bg/includes/libs/ckfinder/userfiles/files/58386020507.pdfIn PDF document text
    • https://naves.cz/res/file/27528081700.pdfIn PDF document text
    • http://windowsplusllc.com/ckfinder/userfiles/files/40371423043.pdfIn PDF document text
    • https://confidence-ist.mktechsol.com/ckfinder/userfiles/files/79647030644.pdfIn PDF document text
    • http://cnhhgj.com/upfiles/userfiles/file/59306716618.pdfIn PDF document text
    • http://norilskgu.ru/userfiles/file/4533225542.pdfIn PDF document text
    • http://www.look4job.gr/images/_user_na/file/namolekesuxugu.pdfIn PDF document text
    • https://forkidsvietnam.vn/wp-content/plugins/super-forms/uploads/php/files/0rnuq06h8foaesbifku41th6p6/9099169678.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_off0000e650.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE650 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fe62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE62 17876 bytes
SHA-256: fc4c4a56d04eb713675017e7d88f06fa424ff20b34425bd53e8f9d389eaea57d
font_02_sfnt_off00012ca9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CA9 10592 bytes
SHA-256: 494a0902343310b49c954b7bbc5c4c79682bd2206233ca568921716729503769