Malicious PDF — malware analysis report

Static analysis result for SHA-256 abfc7efd660fd866…

MALICIOUS

PDF

70.2 KB Created: 2021-09-19 03:57:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: da105307621bd59beb2aedec707114d8 SHA-1: 706a35549dba08fc26afc608f6ee2aa563438b8a SHA-256: abfc7efd660fd866380827badc6499a745b5d03999234189bc7fde4e4160543a
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and multiple URLs, with a high-confidence heuristic flagging it as a link farm on disposable hosting. One specific URL, 'https://ambulatorioveterinariosismondi.eu/file/gasisitezabisajir.pdf', is identified as algorithmically generated and malicious. The embedded JavaScript likely facilitates the download or redirection to a malicious payload, contributing to a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 7

  • 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 to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://infrive.ru/uplcv?utm_term=offroad+drive+desert+download PDF link annotation
    • http://fillaracingacademy.cz/ckfinder/userfiles/files/84447914241.pdfIn PDF document text
    • https://nieruchomosciprzetargi.pl/files/file/kufiwukexazereguwajadi.pdfIn PDF document text
    • http://daieimotors.com/js/upload/files/17587933166.pdfIn PDF document text
    • https://peoplehelppeople.net/uploads/File/ramerigapapibedifodefofo.pdfIn PDF document text
    • http://www.barankayalar.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1614139d14c63e---59984472596.pdfIn PDF document text
    • https://www.edutechusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/161313eb013fc7---nokevakik.pdfIn PDF document text
    • http://affordableadobe.com/ckfinder/userfiles/files/32301205695.pdfIn PDF document text
    • http://smartraoptics.com/fck_filemanager_upload/file/rulajoritutetozivemitudul.pdfIn PDF document text
    • http://www.mostenpo.jp/userfiles/files/gafabulisosof.pdfIn PDF document text
    • http://www.agot.pl/upload/file/xelofuwujijonakepa.pdfIn PDF document text
    • http://lycee-elm.org/userfiles/file/16821335252.pdfIn PDF document text
    • https://bk.knu.ac.kr/ckfinder/userfiles/files/luxefewe.pdfIn PDF document text
    • http://maynenkhiinverter.com/media/ftp/file/madanelined.pdfIn PDF document text
    • http://gusanhightec.com/userData/board/file/71005731447.pdfIn PDF document text
    • http://kjphotocon.org/data/userfiles/files/gugetil.pdfIn PDF document text
    • http://www.guus.edu.mn/ckfinder/userfiles/files/60146003565.pdfIn PDF document text
    • http://thephinhmienbac.com/upload/files/109862681.pdfIn PDF document text
    • http://www.maderas-navarro.com/ckfinder/userfiles/files/xudironerivanaw.pdfIn PDF document text
    • http://ajisushionline.com/uploads/files/15844325748.pdfIn PDF document text
    • http://bhk-aindling.de/userfiles/files/lizoniko.pdfIn PDF document text
    • https://www.weboonline.com/ckfinder/userfiles/files/1232271624.pdfIn PDF document text
    • https://officialbacknumber.org/editor_up/mixuxopewalalodamozojiv.pdfIn PDF document text
    • http://tsraccountants.nl/mailing/images/photo/file/57718209190.pdfIn PDF document text
    • https://ambulatorioveterinariosismondi.eu/file/gasisitezabisajir.pdfIn PDF document text
    • http://gongin.humenia.com/upload/userfiles/2021/09/files/210913083048.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_off0000b487.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB487 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cc99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC99 15564 bytes
SHA-256: e79f2c2b65f2898b4321f46cc2eb0541aa7b9639293726a1bc94822398a1b102
font_02_sfnt_off0000f2ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2CA 10524 bytes
SHA-256: a75b4db16181b5578b7ca20ece622ef995ecae8dbd322cbf262c64c834af3152

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