Malicious PDF — malware analysis report

Static analysis result for SHA-256 c9a6ae575efb7e90…

MALICIOUS

PDF

73.1 KB Created: 2021-09-19 12:49:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: a35ed023a3813f4e759732643b44bada SHA-1: 21a0a528c0419423e79ec2407a952800c4ecd404 SHA-256: c9a6ae575efb7e901b74519d18c39073f449a31cbfc1ef4fd66e1250ecb37841
126 Risk Score

Malware Insights

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

This PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. The heuristic PDF_SEO_DISPOSABLE_LINK_FARM indicates the document is a link farm designed to host numerous links on disposable domains. The embedded URLs, despite some being marked benign, contribute to the overall malicious intent of directing users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://kibledergisi.net/resimler/files/11156757928.pdf In PDF document text
    • https://partnyor.az/userfiles/file/terefer.pdfIn PDF document text
    • http://akinmedikal.com/uploads/file/49870368402.pdfIn PDF document text
    • http://mobilahomedesign.com/userfiles/files/72253455427.pdfIn PDF document text
    • http://ccadl.com/files/20210913095247.pdfIn PDF document text
    • https://la-klamm.org/Files/files/dutoratazimodijaguwod.pdfIn PDF document text
    • http://hotelrefah4ter.ir/basefile/hotelrefah4terir/files/bejudege.pdfIn PDF document text
    • https://kolodezrus.ru/wp-content/plugins/super-forms/uploads/php/files/64b84fa0ddd50283674b8b224b70b59c/58408928228.pdfIn PDF document text
    • http://yeosingol.com/FileData/ckfinder/files/20210906_C8BC97E65AA4494B.pdfIn PDF document text
    • https://doucetplasticsurgery.com/ckfinder/userfiles/files/puwepadupitepata.pdfIn PDF document text
    • http://dmn.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1613f92f1311d1---kisogidiviwexevali.pdfIn PDF document text
    • https://parklanehotel.asia/userfiles/file/fawabiralopij.pdfIn PDF document text
    • https://bucatariizidite.ro/printuri-fi/files/677695853.pdfIn PDF document text
    • https://www.colegiodesafio.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/1613dde94971d1---momow.pdfIn PDF document text
    • http://ranjitabiswas.com/userfiles/files/voxezezevujafop.pdfIn PDF document text
    • http://arcenevents.nl/site/upload/files/xukisativegavupiji.pdfIn PDF document text
    • http://topimmigrationlawyer.org/ckfinder/userfiles/files/bevumanepadano.pdfIn PDF document text
    • http://volareinmongolfiera.it/userfiles/files/gatofebobut.pdfIn PDF document text
    • https://cosanuesa.com/componentes/editor/ckfinder/userfiles/files/rawukudomulox.pdfIn PDF document text
    • http://umffz21.ru/admin/ckfinder/userfiles/files/girinexebonujokofeser.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=clash+of+clans+hack+no+private+serverPDF 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_off0000b879.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB879 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d090.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD090 10768 bytes
SHA-256: b819e5ffb0e2d2ad303cd7955cddb27db5778890748518c1ce9523ec63355af9
font_02_sfnt_off0000e957.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE957 17504 bytes
SHA-256: eaf817dd953a53ed26f62d2742fe42fd7e633e62a5b9985349ff0362efe21167

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