Malicious PDF — malware analysis report

Static analysis result for SHA-256 e33dba7e6225ce26…

MALICIOUS

PDF

82.5 KB Created: 2021-09-13 09:44:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 808773aa491904dd955126aad69c910e SHA-1: 1f98ee05cda19117dba3b10c5f82ba9324b4b38b SHA-256: e33dba7e6225ce261d91e5f31c06ebd1c87b5e4722f593d4090e52991ce6ac28
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with several pointing to compromised WordPress upload directories, indicating a phishing or redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to lure users to malicious sites or download further payloads. No scripts were extracted, but the PDF structure and URL analysis are sufficient to determine its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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
  • 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://massiimo.com/piceditor/file/giravutiranotur.pdf In PDF document text
    • http://www.cenlajobinator.com/siteuploads/editorimg/file/vulitavumatefivulefewur.pdfIn PDF document text
    • https://suprizpin.com/calisma2/files/uploads/76934092448.pdfIn PDF document text
    • https://duproject.com/uploadEditor/files/rapenadudifinadujexi.pdfIn PDF document text
    • https://aashianarealty.com/file/nirupuluv.pdfIn PDF document text
    • http://st-ark.it/userfiles/files/76490275754.pdfIn PDF document text
    • http://csc0512.com/userfiles/file/20210902042752_vgj48b.pdfIn PDF document text
    • https://www.sexualaufklaerung-schule.ch/ck/ckfinder/userfiles/files/59848082218.pdfIn PDF document text
    • http://proart.by/media/file/53935362772.pdfIn PDF document text
    • http://bibrka-school.org.ua/ckfinder/userfiles/files/patodeda.pdfIn PDF document text
    • http://triumphtoday.org/wp-content/plugins/formcraft/file-upload/server/content/files/1613852f48a077---vodelevekujofenuwavobat.pdfIn PDF document text
    • http://adhdadvisory.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613e930432559---52276505447.pdfIn PDF document text
    • http://gocoachfox.com/userfiles/file/20305087818.pdfIn PDF document text
    • http://mobil-tech.com/files/91823634113.pdfIn PDF document text
    • http://phutungotodungha.com/img/files/febekiwimos.pdfIn PDF document text
    • http://vankouwenenmastop.nl/UserFiles/file/55559648179.pdfIn PDF document text
    • https://rdw-wolf.de/backend/ckfinder/userfiles/files/kuwevu.pdfIn PDF document text
    • http://www.medicalalliedtraining.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613cc7aab9c93---xitopijukelonirut.pdfIn PDF document text
    • http://www.perchegouet.com/ckfinder/userfiles/files/5446465641.pdfIn PDF document text
    • http://bsa-billiard.by/images_from_html_editor/file/vozotebeten.pdfIn PDF document text
    • https://goldgreiner.de/userfiles/file/fugirezujugojazivamiraz.pdfIn PDF document text
    • http://purepassion.pl/userfiles/file/4301182357.pdfIn PDF document text
    • http://karinameal.ru/imgdish/files/nixafazuk.pdfIn PDF document text
    • http://le-lemniscus-incandescent.fr/ckeditor/upload/files/18093541853.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=do+not+disturb+driving+androidPDF 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_off0000db7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB7B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f38d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF38D 18740 bytes
SHA-256: e0860f1d5921e40a4c49a3d9ad370508a8c30d270d6c26dad645dd4594e6b4d4
font_02_sfnt_off000123dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123DD 10552 bytes
SHA-256: 268b185b6696c3b863788c53023d60fecc912b4b89723a47fb50a0e870435fff

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