Malicious PDF — malware analysis report

Static analysis result for SHA-256 a7c0c93934b00ec5…

MALICIOUS

PDF

83.5 KB Created: 2021-09-16 21:11:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 3f340caa8ca85ea219f39d3a9069098d SHA-1: 29573290b1fc0d64e29f840c3af09539468cbff0 SHA-256: a7c0c93934b00ec59261434837f03df21ba740d062863a0a9004da3e74253804
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and is flagged by multiple heuristics as malicious, including a link farm detection. The document's structure and numerous external links suggest an attempt to redirect users to potentially harmful websites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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
  • 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://driftwoodcc.com/userfiles/files/19232660310.pdf In PDF document text
    • https://krassimirtaskov.com/userfiles/files/pitixaxarosokoguxez.pdfIn PDF document text
    • http://excitechem.com/userfiles/file/17369002994.pdfIn PDF document text
    • http://jsushibrea.com/uploads/files/lixawifiz.pdfIn PDF document text
    • https://metricgroup.it/uploads/file/97344152329.pdfIn PDF document text
    • http://www.psoealora.es/ckfinder/userfiles/files/70665206974.pdfIn PDF document text
    • http://phuketdriveschool.com/userfiles/file/131396032.pdfIn PDF document text
    • http://f-okinawa.com/img/tmp/file/68892060864.pdfIn PDF document text
    • http://dolinakrzeptowa.pl/public/upload/ckfinder/userfiles/files/wanuro.pdfIn PDF document text
    • http://aleshashop.net/uploaded_files/userfiles/files/lalapenivizifarisi.pdfIn PDF document text
    • http://sb-78.ru/files/file/88594023191.pdfIn PDF document text
    • http://cnex.cc/images/blog/file/kuseforavexoberapujaxeli.pdfIn PDF document text
    • http://safedoorsystems.com/cmsimages/file/2709888878.pdfIn PDF document text
    • http://npi-management.com/ressource/site-image/files/tidubir.pdfIn PDF document text
    • http://www.thegrcinstitute.org/app/webroot/js/ckfinder/userfiles/files/pekisapujiponesabanafowi.pdfIn PDF document text
    • http://embeddedhr.com/ckfinder/userfiles/files/farunabirajerawi.pdfIn PDF document text
    • http://maxitelt.no/wp-content/plugins/formcraft/file-upload/server/content/files/16140c352defa6---kiwusijurijeguw.pdfIn PDF document text
    • https://art-gallery.mn/uploads/files/vinimolepilodom.pdfIn PDF document text
    • http://fotostudiovaccari.it/userfiles/files/foluv.pdfIn PDF document text
    • http://plusk-car.com/js/upload/files/xowokinonawiti.pdfIn PDF document text
    • http://capmar.eu/userfiles/file/sipuxiwaj.pdfIn PDF document text
    • https://dpengineers.info/admin/userfiles/file/dasowexi.pdfIn PDF document text
    • https://bgg.pirkitpadangas.lt/ckfinder/userfiles/files/zuriterurelerofitemax.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=android+chat+headPDF 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_off0000e547.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE547 10232 bytes
SHA-256: 938f6f37cd34e98883fd5f53cd18aeab610753c3ce6da8b15455a567c746149e
font_01_sfnt_off0000fc2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC2D 17192 bytes
SHA-256: 1a48fdb41dd03f50ae822c9f1818b985bc4477f1a20280fccdfd4aa7c6bef136
font_02_sfnt_off00012850.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12850 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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