Malicious PDF — malware analysis report

Static analysis result for SHA-256 14bc94f8683511bd…

MALICIOUS

PDF

85.1 KB Created: 2021-09-11 08:04:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-23
MD5: eb9bc681f7a2857fccd14613a0780c24 SHA-1: 26e2561652a763529db53fef134c749deb4c4f79 SHA-256: 14bc94f8683511bde426abe5b5a25be3f497d2d4555e9bc6982c9fd3b1ef62a4
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses a password-protected-archive lure. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9905

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
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://inwebjor.ru/uplcv?utm_term=saber+las+contrase%C3%B1as+wifi+guardadas+en+android PDF link annotation
    • https://gs-hemeringen.de/ablage/userfiles/files/badefesutexipur.pdfIn PDF document text
    • https://jensbrode.de/files/file/patodox.pdfIn PDF document text
    • https://fgcrubochi.com.ng/ckfinder/userfiles/files/88717382848.pdfIn PDF document text
    • http://isagenixmakessense.com/ckfinder/userfiles/files/vubifateburu.pdfIn PDF document text
    • http://ecilingirler.com/resimler/files/dizafora.pdfIn PDF document text
    • https://www.hkfew.org.hk/ckfinder/userfiles/files/nedalirepegidetofazefem.pdfIn PDF document text
    • https://frontiermyanmar.com/sites/all/libraries/ckfinder/userfiles/files/68308678660.pdfIn PDF document text
    • http://ylpqzl.com/ckfinder/userfiles/files/77330725199.pdfIn PDF document text
    • http://valeneighbors.com/userimages/97121956246.pdfIn PDF document text
    • http://dakhoanhanai.com/images/files/bopabivu.pdfIn PDF document text
    • http://bodybybodyology.com/ckfinder/userfiles/files/nikarowesoxuwidovotilavu.pdfIn PDF document text
    • https://retake.dk/ckfinder/userfiles/files/modufefilunote.pdfIn PDF document text
    • http://famcareconnect.org/wp-content/plugins/formcraft/file-upload/server/content/files/16138194a5e0da---8779101282.pdfIn PDF document text
    • http://klick-tipp.info/ckfinder/userfiles/publics/files/vedaxegogebepufuvesa.pdfIn PDF document text
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/bti2qa2kn4830clf6l9q429e43/89544082772.pdfIn PDF document text
    • http://petukmahaaaraj.com/userfiles/file/43928752307.pdfIn PDF document text
    • http://tsradviseurs.nl/mailing/images/photo/file/webab.pdfIn PDF document text
    • http://jrpst.pl/userfiles/file/fodisebamoz.pdfIn PDF document text
    • https://costabravas.com/uploads/localidades/files/desajo.pdfIn PDF document text
    • https://bearings.vn/images/ckeditor/files/24586971160.pdfIn PDF document text
    • http://duetsepolno.pl/userfiles/file/34280875775.pdfIn PDF document text
    • https://cplastik.com/data/cms/file/mezebasawozimi.pdfIn PDF document text
    • https://okinawa4d.com/contents/files/25808431869.pdfIn PDF document text
    • http://www.anclupnapoli.it/userfiles/file/movix.pdfIn PDF document text
    • https://hatinhjobs.com/upload/files/jubapetedipogulo.pdfIn PDF document text
    • http://hawaiisushi.iorderfoods.com/uploads/files/6551862345.pdfIn PDF document text
    • http://reliancefla.com/admin/images/file/pivuwuviwugizem.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_off0000de91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE91 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f6a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6A8 11260 bytes
SHA-256: eb0971a9e0237ad5607c2f8dc5f40e0d595bca8db0ef4dc738a30d2fc3920e6b
font_02_sfnt_off000110c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110C4 19720 bytes
SHA-256: ed4fcb65429e7c09ce516df51980852a63fd944a80df935d9e934115270aafb2