Malicious PDF — malware analysis report

Static analysis result for SHA-256 c34203cc9786a8bf…

MALICIOUS

PDF

83.9 KB Created: 2021-09-14 11:54:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 55db9e46dafe1070d0beb0e445315fc4 SHA-1: 42b71b28925de7185d407c781499f9bb5325e379 SHA-256: c34203cc9786a8bf111e8fa4d3e2fe60811b0662ef267342b1add20d5c3c6cf4
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many pointing to suspicious domains, which are likely used to redirect users to malicious sites. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicates a deliberate attempt to create a link farm for SEO manipulation or to host malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://highlander-inn.com/assets/userfiles/files/sabepokovagosanazoxam.pdf In PDF document text
    • http://xn--3e0b556bhrbowi6undva.com/ckupload/files/netefes.pdfIn PDF document text
    • https://univerosg.com/ckfinder/userfiles/files/59404219051.pdfIn PDF document text
    • https://vegas-shop.net/uploads/files/woxodowowixuzatokepogi.pdfIn PDF document text
    • http://brodart01.com/wp-content/plugins/super-forms/uploads/php/files/80jgtrsmaj98l0m0qr8fthk338/wopasataxisakatola.pdfIn PDF document text
    • http://remont-etalon.ru/upload/files/pezajagofi.pdfIn PDF document text
    • http://ucg-eg.com/userfiles/file/dipeledajijukeb.pdfIn PDF document text
    • http://slstudio.it/userfiles/files/65079600403.pdfIn PDF document text
    • http://hawaiisushi.iorderfoods.com/uploads/files/kaguninogolixokuwanokujej.pdfIn PDF document text
    • http://mko-yug.ru/wp-content/plugins/super-forms/uploads/php/files/5f768a36bb3755f29a90e8e6a800c9db/jidoluxubajimixiri.pdfIn PDF document text
    • http://levne-pohary.cz/UserFiles/File/wetizaxiwexurovobun.pdfIn PDF document text
    • http://hodinovysoused.cz/upload/file/34744157053.pdfIn PDF document text
    • https://www.tristar-technology.com/ckfinder/userfiles/files/5069094784.pdfIn PDF document text
    • https://cheeselicious.net/UserFiles/file/winamagawajidojesi.pdfIn PDF document text
    • https://ibericadearmerias.com/file/sivane.pdfIn PDF document text
    • http://opgzvh.hr/upload/file/kijuse.pdfIn PDF document text
    • http://mtcnx.com/upload/fckimagesfile/tiremotu.pdfIn PDF document text
    • http://classicalgardenornaments.com/uplds/file/buwemegux.pdfIn PDF document text
    • https://totounited.com/contents/files/titazudusej.pdfIn PDF document text
    • https://ylwlgwadmin.ylwl.cn/upload/files/68948954037.pdfIn PDF document text
    • http://nhuaduongnhapkhauaz.com/upload/files/gimefuwurabesujed.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=how+to+print+from+my+android+phone+to+my+wireless+printerPDF 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_off0000e123.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE123 17916 bytes
SHA-256: 69435324c53ac32e6797c48b1c280af8a5314c383d2bdc56e873741895af0e9e
font_01_sfnt_off00011020.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11020 10952 bytes
SHA-256: 95b154e63084cf039d4757c6f652f983fa95aa35e04dde79932fedbd1c2c544e
font_02_sfnt_off0001295b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1295B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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