Malicious PDF — malware analysis report

Static analysis result for SHA-256 5354057e615f75ab…

MALICIOUS

PDF

89.0 KB Created: 2021-09-17 04:15:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 6e571033707f0c90d881afb3eaf0171f SHA-1: 6a5b3cbb763905b21f3131a5de5e1e2c28c74c04 SHA-256: 5354057e615f75ab8caadc65e7f16ee6735d66a0b762c809a71d81e1e2f3938f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious Link

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs that point to compromised WordPress sites and disposable hosting, functioning as a link farm. These links likely lead to phishing pages or further malware downloads, aiming to trick users into clicking them.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://bc2000.order-pro.com/ckfinder/userfiles/files/51099795140.pdf In PDF document text
    • https://europacreativaeuskadi.eu/files/galeria/files/wowezi.pdfIn PDF document text
    • http://zgkimsteszew.pl/img/upload/files/dakopumeka.pdfIn PDF document text
    • http://elenasteele.com/wp-content/plugins/formcraft/file-upload/server/content/files/16138460f85622---2350932737.pdfIn PDF document text
    • http://www.og2c.com/images/file/tuwifodavagu.pdfIn PDF document text
    • https://tideandtigers.com/ckfinder/userfiles/files/50580955771.pdfIn PDF document text
    • http://kirks-pool.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ea0155b217---17682333676.pdfIn PDF document text
    • http://ghettaetamionarchitetti.it/userfiles/files/pazedomojutitesotik.pdfIn PDF document text
    • http://www.bc-arman.kz/ckfinder/userfiles/files/51704756638.pdfIn PDF document text
    • https://a2designbg.com/userfiles/file/gamobiwinesisowataz.pdfIn PDF document text
    • http://avon-bratislava.sk/files/files/liwoxekalu.pdfIn PDF document text
    • http://xy-interior.com/uploads/files/202109170557132306.pdfIn PDF document text
    • http://redigonda.it/userfiles/files/87474052987.pdfIn PDF document text
    • https://wineuniverse.us/userfiles/file/nafewimurerakuvejodexexew.pdfIn PDF document text
    • http://th-hl.com///upload/files/34537927314.pdfIn PDF document text
    • https://vuaship.com/wp-content/plugins/super-forms/uploads/php/files/k7jtrldrvtgidvm5lvq00r86hr/38130574882.pdfIn PDF document text
    • http://bagpack.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/1614170f054f6b---44744939487.pdfIn PDF document text
    • http://arsvet.ru/img/upload/nolokuxetisabebupawa.pdfIn PDF document text
    • http://www.instalacionescueto.com/nueva/ckfinder/userfiles/files/63396489017.pdfIn PDF document text
    • http://www.benvenutialmare.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613d08dc713cd---nurenibitazero.pdfIn PDF document text
    • https://sealskinz.ru/files/file/jufolomej.pdfIn PDF document text
    • http://serting.eu/userfiles/files/57943108146.pdfIn PDF document text
    • http://skontrolsengineering.com/file_media/file_image/file/33168624775.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=onward+full+movie+watch+onlinePDF 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f800.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF800 10848 bytes
SHA-256: 0769805707cdd27dba94ef88a882320f5b29482cfad06cca863ba76c2eb56cd1
font_01_sfnt_off000110ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110EC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000128fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128FE 17596 bytes
SHA-256: c2890e5d24a08dddb3e4927f2be40332b8116125c57f300f99414838d14bd800