Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e6163ed1702e416…

MALICIOUS

PDF

82.9 KB Created: 2021-09-19 15:24:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 9e53fedbef0c864540dbadb9bc98be9f SHA-1: 1de358a6aeb4a5545ad24d52bc8477830b8bc5c5 SHA-256: 3e6163ed1702e4161c8fce7b0cb8c65b286a2cbba9de578d0e67cb1b943be191
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

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 disposable domains, and exhibits characteristics of a link farm. The primary purpose appears to be directing users to potentially malicious external sites, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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://paradisetnl.com/FileData/ckfinder/files/20210908_AE912B621700115F.pdf In PDF document text
    • http://roland-toys.eu/userfiles/file/dawogariniwir.pdfIn PDF document text
    • https://coolinterier.sk/upload/files/23682410922.pdfIn PDF document text
    • http://igabana.com/upfolder/e/files/20210916155429.pdfIn PDF document text
    • https://xn--i1aam8cb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/b6f81eefacc68d0f92f164c054043d1e/takizetozexolitivozigap.pdfIn PDF document text
    • http://mixline.ru/img/lib/file/44379736123.pdfIn PDF document text
    • https://www.ewdel.cz/ckfinder/userfiles/files/24384037731.pdfIn PDF document text
    • http://irollee.com/userfiles/file/vifamotimejekatuwimeju.pdfIn PDF document text
    • http://kco.su/userfiles/file/45239789949.pdfIn PDF document text
    • http://www.colormotion.cz/UserFiles/file/82369837464.pdfIn PDF document text
    • http://artpolyclinic.com/file/files/vidoxewew.pdfIn PDF document text
    • https://shreenathtechnologies.com/userfiles/file/48580908445.pdfIn PDF document text
    • http://arisutour.com/ckupload/files/zezunegesapipukulewu.pdfIn PDF document text
    • http://chalappuram.com/userfiles/file/radososunikirilolu.pdfIn PDF document text
    • http://trainternational.in/wp-content/plugins/formcraft/file-upload/server/content/files/16140eb934b7b8---729218504.pdfIn PDF document text
    • http://bladensburg.abwingsmd.com/uploads/files/52443479804.pdfIn PDF document text
    • https://cremyco.com/app/webroot/docs/file/54715045244.pdfIn PDF document text
    • http://sangiorgioautoservizi.com/userfiles/files/48151654073.pdfIn PDF document text
    • https://vibingvibes.com/userfiles/files/wokirojodonaniwir.pdfIn PDF document text
    • http://bbhshipyard.com/userfiles/file/vedefelodokekig.pdfIn PDF document text
    • http://sreema.org/FCKeditor/file/bikapafugazutaderosesi.pdfIn PDF document text
    • http://robertoantoniz.com/resources/original/file/4106911866.pdfIn PDF document text
    • http://mabo-meccanica.eu/userfiles/files/70838847808.pdfIn PDF document text
    • https://wita.lt/images/files/16250963752.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=change+location+in+play+storePDF 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_off0000df37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF37 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f749.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF749 17840 bytes
SHA-256: 01081a5ea62d97dcf5c1f2a41c53c1ac9fe7966a4907dfa7f499160427034905
font_02_sfnt_off00012567.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12567 10796 bytes
SHA-256: b36b47f13b19d61534518d5492088b2221ba5a3f81f3cbaa0a11bdbebe4087ab

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