Malicious PDF — malware analysis report

Static analysis result for SHA-256 07b69039bdbc2b32…

MALICIOUS

PDF

83.1 KB Created: 2021-09-23 04:10:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: caf17cd2653d070eaaa7d7256ed04a03 SHA-1: 2b8f44015f0e6bca5443c5122306886128966093 SHA-256: 07b69039bdbc2b3219ba73dd73cc780cde2c0023c70bb2fdbac64c5f528eb1fe
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains a large number of links to external PDF files hosted on various domains, indicating a link farm or distribution network. While no scripts were explicitly extracted, the PDF structure and the presence of numerous external links suggest an attempt to direct users to potentially malicious content or for SEO manipulation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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 http://lyzebrno.cz/userfiles/file/9111918312.pdf In PDF document text
    • http://studiozammuner.eu/userfiles/files/590434910.pdfIn PDF document text
    • https://lostfoundglobal.com/userfiles/file/gibegubiwit.pdfIn PDF document text
    • http://nattuvaartha.com/assets/ckfinder/core/connector/php/uploads/files/xuxebobiwunuvukuz.pdfIn PDF document text
    • http://halongwave.com/userfiles/file/74441730514.pdfIn PDF document text
    • https://gullyracing.it/admin/ckfinder/userfiles/files/zomilofevarulejavetumusuf.pdfIn PDF document text
    • http://www.chiringuitomediterraneo.com/ckfinder/userfiles/files/22891603311.pdfIn PDF document text
    • https://turismopontevedra.com/ckfinder/userfiles/files/97109867105.pdfIn PDF document text
    • https://slezanie.eu/userfiles/file/82695098958.pdfIn PDF document text
    • http://articolo17.it/siti/usr/foto/files/45947263772.pdfIn PDF document text
    • https://marupyara.com/fotos/userfiles/file/95353448336.pdfIn PDF document text
    • https://syntellect.ru/Repository/file/sosirowogi.pdfIn PDF document text
    • http://nhadatv.com/webroot/img/files/xexufukuredezez.pdfIn PDF document text
    • http://seteo-dechets.com/images/file/musefakorenajuvu.pdfIn PDF document text
    • http://ledseoul.com/userData/board/file/pimolijesubim.pdfIn PDF document text
    • http://studiospazioambiente.it/userfiles/files/loremepigav.pdfIn PDF document text
    • https://tresonance.org/uploadfiles/kiminemefupoxijawule.pdfIn PDF document text
    • http://thelifelesson.net/home/tappingchanges/public_html/dowalumniusa/ckfinder/userfiles/files/78348673740.pdfIn PDF document text
    • http://fulns.com/uploadfile/fckedit/file/1630474569cS59.pdfIn PDF document text
    • http://kortennis.co.kr/B/ck/ckfinder/userfiles/files/64494881818.pdfIn PDF document text
    • https://nieruchomosciprzetargi.pl/files/file/bigidizir.pdfIn PDF document text
    • https://amoslodge10.org/ckfinder/userfiles/files/56307593894.pdfIn PDF document text
    • https://gmt-tw.com/app/webroot/userfiles/files/gagupeselifeguvilow.pdfIn PDF document text
    • https://energiadirect.pl/application/resources/ckfinder/userfiles/files/texiba.pdfIn PDF document text
    • http://hataylezzeti.com/resimler/files/xivepadid.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=gb+emulator+apkPDF 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_off0000dfb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFB1 18100 bytes
SHA-256: d7a85e7dd6cb1a4146014406c2e811328f85147e0e1c6e94e53041d5ee7364bf
font_01_sfnt_off00010f26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F26 10420 bytes
SHA-256: f9482521e94db6097ff5ab3b419df3a98a634ed01708d2c3b676bb8c3ca3bdb5
font_02_sfnt_off0001269a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1269A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1