Malicious PDF — malware analysis report

Static analysis result for SHA-256 2aff0f2a368d87b7…

MALICIOUS

PDF

83.3 KB Created: 2021-08-24 05:43:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 73348110e24f03ecf911006bac7c1bb3 SHA-1: 2c0c6235e7c9cb3744adbb9ee9075aefe0a67492 SHA-256: 2aff0f2a368d87b79cf8543e53210dee1eb51000d29f2537d63eff647a29519a
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a high-confidence ML classifier and ClamAV detection as a phishing trojan. It functions as a link farm, with numerous URLs pointing to compromised CMS uploads and disposable hosting domains. The primary purpose appears to be directing users to potentially malicious content or phishing sites through a network of deceptive links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://tpdw.pl/userfiles/file/mewagux.pdf In PDF document text
    • http://easy-sleep24.de/shop/images/editorfiles/file/gejawugigilekezorudibo.pdfIn PDF document text
    • http://licausi.it/userfiles/files/sanovisebebefe.pdfIn PDF document text
    • https://www.simcoerecovery.net/wp-content/plugins/super-forms/uploads/php/files/gfbsfvd9vrc6iltiovlr1bcj52/78488646331.pdfIn PDF document text
    • https://destockbaby.com/ckfinder/userfiles/files/89317974524.pdfIn PDF document text
    • https://catbasailing.com/upload/fck/file/67812776452.pdfIn PDF document text
    • http://veronicanealhome.com/wp-content/plugins/formcraft/file-upload/server/content/files/2/160ac7e61df652---dusemujufovokabiwejiledop.pdfIn PDF document text
    • http://golfproradost.cz/webpagebuilder/ckfinder/userfiles/files/63555537413.pdfIn PDF document text
    • https://www.acetechnology.co.in/wp-content/plugins/super-forms/uploads/php/files/7a2qsjdefkiq0425rf45mi7bk2/xupemimezopinopokepexel.pdfIn PDF document text
    • http://thietbiotovn.com/Images_upload/files/febitiwara.pdfIn PDF document text
    • http://rethabise.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160c8c2ed90171---nosuxomupinoxo.pdfIn PDF document text
    • http://www.ddd-iasi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/161098941739f7---duperajerumojubagetowoze.pdfIn PDF document text
    • https://ajur.rest/uploads/userfiles/file/2601764595.pdfIn PDF document text
    • http://studiopedrazzini.eu/userfiles/files/86671478814.pdfIn PDF document text
    • http://harringtonassociateslaw.com/Test/JabzMedicalBillingService/userfiles/file/vokisumufoso.pdfIn PDF document text
    • https://webtechnocrats.com/upload/file/56833418802.pdfIn PDF document text
    • http://agendaalzheimer.org/files/galeria/files/pilimizizegoxenowati.pdfIn PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083842b82bc8.pdfIn PDF document text
    • http://kielcenoca.pl/files/file/237690950.pdfIn PDF document text
    • http://milcontabil.com.br/wp-content/plugins/super-forms/uploads/php/files/mv2mcd1sm7ik8hj6kuu3oagg16/pitanovudumeruko.pdfIn PDF document text
    • http://nowyhotelik.pl/userfiles/file/mubaxizufozote.pdfIn PDF document text
    • http://dharmapuridiocese.com/svnprojects/DHD/Source/images/files/jekinijalipejufewavevixax.pdfIn PDF document text
    • https://dogathermalhotel.com/resimler/files/gokijowebesiboxabirifogad.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=drawing+for+beginners+with+oil+pastelsPDF link annotation
    • https://bxthirteen.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/c3a90d11584fcf96820c48bf9a98ac00/8819043216.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_off0000e26e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE26E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fa80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA80 16812 bytes
SHA-256: 28db86956f39a699c08cce58b388cbc0835c5d94f4c9d73c094ff3c0cafb3d42
font_02_sfnt_off000125e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125E9 10864 bytes
SHA-256: 56736f0d3de1a5344d22dc24feacb8802f3e059101a1796047eacfd545dd9b9a

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