Malicious PDF — malware analysis report

Static analysis result for SHA-256 42251f7b746c27a0…

MALICIOUS

PDF

69.2 KB Created: 2021-09-26 14:57:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 3a30bfc974302ead396fd62c52b2b936 SHA-1: 3d1d4f0080fe0a668e9d22fb5906a143c4b560fc SHA-256: 42251f7b746c27a05c91547e4f6020b8efe0589696477c3c0ad663d92dd46e48
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised websites and disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. No scripts were extracted, and the document body was unreadable, but the heuristic findings clearly point to a malicious link distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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://dragoniresorts.com/userfiles/22676534876.pdf In PDF document text
    • http://www.jamesbgriffinlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130de11a11a4---19892271161.pdfIn PDF document text
    • https://www.hadlowsecurityshutters.com/wp-content/plugins/super-forms/uploads/php/files/1bd2f3690f05f9e493340cddb1a029fd/50236792570.pdfIn PDF document text
    • http://boras-sjuharad.boj.se/uploads/userfiles/files/porozisezasiwatafeka.pdfIn PDF document text
    • https://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614a24b9af93e---51883684151.pdfIn PDF document text
    • http://happyorderfood.com/uploads/files/zuvigezolizipajivimotub.pdfIn PDF document text
    • http://miwon.com.vn/app/webroot/uploads/files/72998929060.pdfIn PDF document text
    • http://hocikto.info/userfiles/file/sovijizexozof.pdfIn PDF document text
    • http://autohondl.cz/userfiles/file/donigoramimanogofuvil.pdfIn PDF document text
    • http://mabo-meccanica.eu/userfiles/files/relofepugijepi.pdfIn PDF document text
    • http://nextgenship.net/upload/file/20210920163210403736.pdfIn PDF document text
    • https://schreinerheusi.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613803954afac---27480746921.pdfIn PDF document text
    • http://diysmart.net/userfiles/file/xilazexumukepobodafoge.pdfIn PDF document text
    • http://epmresearch.org/userfiles/files/94248509029.pdfIn PDF document text
    • https://harpethvalleypto.org/wp-content/plugins/super-forms/uploads/php/files/fe38e1c7b38a846ac0de7e81c297cba2/guxitasogotanamaju.pdfIn PDF document text
    • http://flemingdecal.com/uploads/assets/file/25622176228.pdfIn PDF document text
    • http://autofox.lt/ckfinder/userfiles/files/zemuvokujobojekegorojo.pdfIn PDF document text
    • https://netwindowvn.com/uploads/userfiles/file/57479450179.pdfIn PDF document text
    • https://baongochoa.com/upload/file/85252773862.pdfIn PDF document text
    • http://lnaixi.com/userfiles/file/20210906112755_2147191015.pdfIn PDF document text
    • http://opuspoint.com/ckfinder/userfiles/files/ziselufaronif.pdfIn PDF document text
    • https://cristiandellavedova.com/wp-content/plugins/super-forms/uploads/php/files/a4b6244cb923df922cbc69dac1e86cc5/tudode.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=download+game+naruto+apk+offlinePDF 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_off0000aeca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAECA 15772 bytes
SHA-256: a4c9707e175c955ecec4e40d94c821f6aed412e1c6ad4faacd075beac93c33d5
font_01_sfnt_off0000d658.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD658 10952 bytes
SHA-256: 1659cc2ed9d4c154f78c207fcf0bcfe0a412dac487f4c56b62aa07b18cc8ddd2
font_02_sfnt_off0000ef8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF8D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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