Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d4a1ace68461bb7…

MALICIOUS

PDF

83.8 KB Created: 2021-09-19 08:02:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 15ab409fb6238344e89d13b9b4e838ff SHA-1: 5fb954f9e1c6b7949db00b1f003aff6bf82379bc SHA-256: 4d4a1ace68461bb77f0d891700011c15bf16b27f045daa89fac5c34f59464bef
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link T1059.007 JavaScript

This PDF file was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains a link farm pointing to multiple domains, many of which are hosted on compromised CMS upload storage or disposable hosting, suggesting an attempt to distribute malicious content or phish for credentials. No scripts were extracted, but the embedded URLs are the primary indicators of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 7

  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://ilyxrace.com/userfiles/files/waparimebamitepozid.pdf In PDF document text
    • http://www.cda.org.hk/ckfinder/userfiles/files/24575098520.pdfIn PDF document text
    • http://tgroupsrl.com/userfiles/files/rikulalajesi.pdfIn PDF document text
    • http://sinice-rasy.cz/files/file/noleporebisas.pdfIn PDF document text
    • https://kiemtoandongnghi.com/public/plugins/ckfinder/userfiles/files/mukonenadotaj.pdfIn PDF document text
    • https://christembassybarking.org/wp-content/plugins/super-forms/uploads/php/files/e9e9bb4462e0596a80e382c9c96e6e5b/8636987229.pdfIn PDF document text
    • http://mobiliteit.nu/files/14293522234.pdfIn PDF document text
    • https://rm-parketi.si/uploads/77084541433.pdfIn PDF document text
    • http://2222.netsociality.com/upload/files/zonit.pdfIn PDF document text
    • http://diegogenna.it/userfiles/files/45530514771.pdfIn PDF document text
    • http://seasonmediagroup.com/pic/file/nutotokuneg.pdfIn PDF document text
    • https://huuphongplastic.vn/uploads/images/files/30956075207.pdfIn PDF document text
    • https://mimpiindah2.com/contents/files/98165444520.pdfIn PDF document text
    • http://www.siposferenc.hu/html/3421606164.pdfIn PDF document text
    • http://candleelectricals.com/uploaded_files/userfiles/files/xonuwewomupejibo.pdfIn PDF document text
    • https://seeandhearbetter.ie/img/shop/contents/javipoludalofobikegik.pdfIn PDF document text
    • http://www.maoles.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613e9940180e1---lefedexuw.pdfIn PDF document text
    • http://interreg-ipa-husrb.com/downloads/91076668778.pdfIn PDF document text
    • http://giga.sk/storage/file/24026063165.pdfIn PDF document text
    • http://louisefarmersmith.com/admin/ckeditor/ckfinder/userfiles/files/23072721749.pdfIn PDF document text
    • http://www.majoriscambio.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16131ca74b7cec---60807185745.pdfIn PDF document text
    • http://hamkr.com/userData/board/file/69876709505.pdfIn PDF document text
    • https://aiaciran.org/cache/fck_files/file/31585790735.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=beyblade+qr+code+royal+genesisPDF 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_off0000e21d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE21D 10900 bytes
SHA-256: 83104f710c6277c03666e146019e9236be69acd2b8d0e8056f22c066a85d8939
font_01_sfnt_off0000faea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAEA 17744 bytes
SHA-256: 8e772cff460027e2ce96151dd8ec30c4f85058f5e56c9bc89f1117eef7003b6e
font_02_sfnt_off0001293b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1293B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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