Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc6e91fc2667f2b7…

MALICIOUS

PDF

70.7 KB Created: 2021-09-26 09:49:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 2a4a9218530bb22fca103f82dbce0ab1 SHA-1: e50a8a45b14cf18979d831c9bd5a1cccf1135f84 SHA-256: fc6e91fc2667f2b793172944b71ed63afd36549f7f87ccf1524408503d3cb324
126 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains numerous embedded URLs, with one specifically noted as a link farm on disposable hosting, suggesting a phishing or malware distribution attempt. The presence of multiple external URIs and the link farm heuristic strongly indicate a malicious intent to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://infrive.ru/uplcv?utm_term=free+fortnite+v+bucks+generator+without+human+verification PDF link annotation
    • https://ecoolteh.eu/galeria/file/84291955496.pdfIn PDF document text
    • http://zsdbiopharm.com/upload/files/43767892845.pdfIn PDF document text
    • http://leprofit.ee/cmsfile/contentfiles/80556044158.pdfIn PDF document text
    • http://greensketch.in/userfiles/file/56505183941.pdfIn PDF document text
    • http://www.restorationservice.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1613615e34248e---93008228492.pdfIn PDF document text
    • http://nontaromclinic.com/ckfinder/userfiles/files/67840788327.pdfIn PDF document text
    • https://media-get.ru/userfiles/files/4795024229.pdfIn PDF document text
    • http://indagosrl.it/userfiles/files/wijurafufizogetinoxezonim.pdfIn PDF document text
    • http://come2menorca.com/images/file/67885894301.pdfIn PDF document text
    • http://becucci.it/userfiles/files/xorizatoj.pdfIn PDF document text
    • https://dmshospital.com/mm_engg/files/80084224857.pdfIn PDF document text
    • http://knshzj.com/CKEdit/upload/files/81264103995.pdfIn PDF document text
    • http://safarang.com/basefile/files/botesukozowabodamepelolu.pdfIn PDF document text
    • http://majedalkarkhi.com/pics/file/5565501878.pdfIn PDF document text
    • http://dulichtantai.com/files/uploaded/files/jinemuna.pdfIn PDF document text
    • http://dd-eng.com/files/files/tudugetivojebevek.pdfIn PDF document text
    • https://karthikaspices.com/uploads/file/19576964358.pdfIn PDF document text
    • http://romovi.net/sgi_userfiles/userfiles/files/foxovixuxafa.pdfIn PDF document text
    • https://arnetbilgisayar.com/upload/ckfinder/files/xarunokerefuxaketepokiza.pdfIn PDF document text
    • http://champaigncursillo.com/userfiles/file/96598741871.pdfIn PDF document text
    • https://vidaleve.net/ckfinder/userfiles/files/19848323634.pdfIn PDF document text
    • https://vinaarc.com/app/webroot/files/ckfinder/userfiles/files/jezibonagakabo.pdfIn PDF document text
    • https://hagakure.by/upload/editor/files/23176385418.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_off0000aff2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAFF2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c809.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC809 11196 bytes
SHA-256: e977a7f3812dba0d72069384ff461719d864d695a1049b1dfbab2a2d7e4e374f
font_02_sfnt_off0000e22c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE22C 16784 bytes
SHA-256: ee1be340503d23dc07c0733012fe51d34e1715761714a83047951dfecb8621e3

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