Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd7886c0a80bafdd…

MALICIOUS

PDF

81.6 KB Created: 2021-09-19 16:57:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 9a65b382e0d8108cefae82eba327575a SHA-1: 1a57d39b0a29af3f903fc1f996277cd894ae7f60 SHA-256: cd7886c0a80bafdd71bf852f987332f66ce05fa10a67dd27f559b1f38fdd84d3
156 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, directing users to multiple external URLs, some hosted on compromised CMS uploads. The presence of numerous links on disposable hosting further supports a malicious intent, likely to distribute phishing content or download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

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 https://people11people.gr/uploads/File/10050331373.pdf In PDF document text
    • https://intelean.com/wp-content/plugins/formcraft/file-upload/server/content/files/161325a11af44c---65510486097.pdfIn PDF document text
    • https://directprocessors.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137c670ea310---57292257581.pdfIn PDF document text
    • https://rosedreamholidayhomes.com/ckfinder/userfiles/files/73610734989.pdfIn PDF document text
    • http://bulk-supplies.com/userfiles/file/jaguzubofiwa.pdfIn PDF document text
    • https://turismo-galicia.es/ckfinder/userfiles/files/7078691875.pdfIn PDF document text
    • http://placc.info/up_image/31540549409.pdfIn PDF document text
    • https://myphi.biz/nbloom/fckuploads/file/87885417095.pdfIn PDF document text
    • http://kerama.altrodesign.eu/ckfinder/userfiles/files/befujuxaxemululojaxe.pdfIn PDF document text
    • http://accronline.com/userfiles/file/nifofudorimaxemexos.pdfIn PDF document text
    • http://www.gradur.ba/wp-content/plugins/formcraft/file-upload/server/content/files/16134f1feaa125---kavolux.pdfIn PDF document text
    • http://windcampus.com/wp-content/plugins/formcraft/file-upload/server/content/files/161457336d85d2---kubapibekomozapowevixaviw.pdfIn PDF document text
    • https://www.gsccn.it/wp-content/plugins/formcraft/file-upload/server/content/files/16135501f0af70---vovux.pdfIn PDF document text
    • https://digitaldaya.com/imagenes/file/xirazidifusurogoza.pdfIn PDF document text
    • http://bon-mar.com/fck_user_files/file/81368083490.pdfIn PDF document text
    • http://mnwebdesign.dk/userfiles/file/38515432106.pdfIn PDF document text
    • http://taigesw.com/upload/files/21159063655.pdfIn PDF document text
    • http://sanyosushiglendora.com/uploads/files/39459242160.pdfIn PDF document text
    • https://barrierball.cl/ckfinder/userfiles/files/bugejeboganosekikifowedul.pdfIn PDF document text
    • http://burelomdo.com/ckfinder/userfiles/files/24971958968.pdfIn PDF document text
    • http://vtracauto.com/wp-content/plugins/formcraft/file-upload/server/content/files/161375f668901c---98505217583.pdfIn PDF document text
    • http://phrabat.net/UserFiles/File/wivetibirofudalix.pdfIn PDF document text
    • http://www.advokat.com/app/webroot/img/fck/file/55410434385.pdfIn PDF document text
    • http://hotelalbicia.com/userfiles/file/75798913874.pdfIn PDF document text
    • http://garmaclima.com/uploads/ckfinder/files/tewimazales.pdfIn PDF document text
    • http://pololanna.com/user_img/files/jomugimimuva.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=how+to+bypass+iphone+12+lock+screenPDF 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_off0000d8a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8A3 17944 bytes
SHA-256: c626d34e04b5886841ee8d4a565cb26a09f97f1715edbfac14a6063797c2840b
font_01_sfnt_off000106f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106F9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011f10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F10 11064 bytes
SHA-256: 31bd55ee5772a1b60e7ce06d909cad92fe6c137ef1cffc257d644680d6032884

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