Malicious PDF — malware analysis report

Static analysis result for SHA-256 e012604c56aa25b1…

MALICIOUS

PDF

80.4 KB Created: 2021-09-21 00:35:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 3d1804035da706d500c6a63e09f82e30 SHA-1: 95f5a37a08be6ee18b25ce5d3b231618f05b4908 SHA-256: e012604c56aa25b19bf5cf1a54cd4095c704fd8ab1765fe10a701d6faffd545d
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The file contains numerous embedded URLs, many of which are part of a link farm designed to redirect users. The ML classifier also strongly indicated maliciousness. The presence of a link farm and the phishing detection suggest the primary goal is to lure users to malicious sites, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

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://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/df700750ae14d7ec46f97e6e430f31db/1763015224.pdf In PDF document text
    • https://csp-pub.com/stockages/files/fuvagebil.pdfIn PDF document text
    • http://beauty214.com/uploads/files/202109031216153934.pdfIn PDF document text
    • http://aksaaydinlatma.com/img/editor/image/file/gileladotegix.pdfIn PDF document text
    • https://desco.scp.hr/files/wileledonurexizuxu.pdfIn PDF document text
    • http://akifkasaboglu.com/esatfisek/images_upload/files/fuwanaxapulitipog.pdfIn PDF document text
    • http://issaproject.com/app/views/panel/ckfinder/userfiles/files/11823925260.pdfIn PDF document text
    • https://medgal.pl/admin/ckfinder/userfiles/files/49136780480.pdfIn PDF document text
    • http://simkoongschool.com/uploads/editer/files/32620228067.pdfIn PDF document text
    • http://vasilii-orlov.fun/wp-content/plugins/super-forms/uploads/php/files/d2c4a84fd0b0753ab115c2fa9f5607b0/62854420800.pdfIn PDF document text
    • http://tk-weld.com/images/library/File/75909811185.pdfIn PDF document text
    • http://constantcontinuity.com/membership/data/files/retemenefujixinuso.pdfIn PDF document text
    • http://kirakuramen.com/uploads/files/pipuvamasib.pdfIn PDF document text
    • https://www.sexualaufklaerung-schule.ch/ck/ckfinder/userfiles/files/76741366207.pdfIn PDF document text
    • https://literie-depot.fr/UserFiles/file/mibetaregetokomarabipik.pdfIn PDF document text
    • http://targhevaticane.it/userfiles/files/gusinaragasulo.pdfIn PDF document text
    • http://topp.pl/_topp/file/42854907946.pdfIn PDF document text
    • https://inprovitmexico.com/ckfinder/userfiles/files/23632117010.pdfIn PDF document text
    • http://dailygameresult.com/editor/UserFiles2/files/99875603275.pdfIn PDF document text
    • http://xinyuemu.net/assets/202109/files/20210912112402189748.pdfIn PDF document text
    • https://suprastoc.ro/userfiles/file/83248537327.pdfIn PDF document text
    • http://uptindia.com/newsimages/file///lijopatarawepixikuxokat.pdfIn PDF document text
    • https://navliecky.net/userfiles/file/kopetalopilop.pdfIn PDF document text
    • http://altus.pl/userfiles/file/kiseruwawekawozegujatifir.pdfIn PDF document text
    • http://technocom.pl/editor/file/2674941642.pdfIn PDF document text
    • https://ppuhperspektywa.pl/files/edytor/file/73394365381.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=cartoon+network+watch+and+play+apkPDF 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_off0000d438.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD438 18196 bytes
SHA-256: 7fdb8983542f7217ac1a57f061689a98da4a4ddb41678b4016c6c28ee2e51bcc
font_01_sfnt_off00010357.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10357 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011b6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B6E 10672 bytes
SHA-256: 92de5bd4827785c3a1d426339420d93d9a845dd92d2be1ebe2b0b28d00ca00bb