Malicious PDF — malware analysis report

Static analysis result for SHA-256 f97b18094b8516a0…

MALICIOUS

PDF

79.5 KB Created: 2021-08-28 05:18:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 086b06b8568cdceae117cbe1e33a3fef SHA-1: fc06a562556b22376bf377c793a601631cff6694 SHA-256: f97b18094b8516a02839da11a3bd6a962cb8a5b7e7f021993276209c17083fa2
156 Risk Score

Malware Insights

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

The ML classifier and ClamAV both flagged this PDF as malicious, with ClamAV identifying it as a phishing trojan. Heuristics indicate the PDF functions as a link farm, pointing to numerous compromised CMS upload locations and disposable hosting sites, likely to distribute malware or conduct phishing. The embedded URLs, such as http://amwordpress.org/wp-content/plugins/formcraft/file-upload/server/content/files/160d332056e0b5---nenegukuxuri.pdf, are central to this attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9911

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://montpellier-business-plan.fr/mbp/upload/images/images/upload/ckfinder/zebedasizipirajaf.pdf In PDF document text
    • https://terravistahometeam.com/wp-content/plugins/super-forms/uploads/php/files/c7bdef8c63f2ffa1a0504701116a6f6a/loranoxekutubovapavaj.pdfIn PDF document text
    • https://mantyobras.com/userfiles/file/71634179473.pdfIn PDF document text
    • http://osrclass1967.com/clients/8/84/84e84eb3bb32f45446e669e24fea3ebc/File/17147109512.pdfIn PDF document text
    • http://ffarchitettura.it/userfiles/files/94162958982.pdfIn PDF document text
    • https://www.indee-r.fr/wp-content/plugins/super-forms/uploads/php/files/ab58d15e0565f30aadcc6f47b228d5c2/74044162335.pdfIn PDF document text
    • https://alianzatours.com/imagenes/file/19763788516.pdfIn PDF document text
    • http://www.teaterskolen-efteruddannelsen.dk/ckfinder/userfiles/files/dugubux.pdfIn PDF document text
    • http://studioaba.net/userfiles/files/moparixovujisunirikirofa.pdfIn PDF document text
    • http://amwordpress.org/wp-content/plugins/formcraft/file-upload/server/content/files/160d332056e0b5---nenegukuxuri.pdfIn PDF document text
    • http://poddertradingandindustries.com/userfiles/file/nijezimasiwagutizojimud.pdfIn PDF document text
    • http://www.village-gaulois.org/gestion/ckfinder/userfiles/files/kekelijuwugujowa.pdfIn PDF document text
    • https://actorconseil.com/files/file/18506097813.pdfIn PDF document text
    • http://sourceandsecure.com/uploads/userfiles/file/63738251561.pdfIn PDF document text
    • https://kayakbranson.com/wp-content/plugins/formcraft/file-upload/server/content/files/161175c7d69638---lugigekasizolujepe.pdfIn PDF document text
    • http://bascobrunswick.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16072e2067e8f8---4167078073.pdfIn PDF document text
    • https://cosanuesa.com/componentes/editor/ckfinder/userfiles/files/dunuvedowozizapuzu.pdfIn PDF document text
    • http://savvyais.com/userfiles/file/sunazumigerugerapi.pdfIn PDF document text
    • http://unseretochter.com/images/file/venamafi.pdfIn PDF document text
    • http://re-view.online/fckFiles/file/48348121091.pdfIn PDF document text
    • http://julieesteban.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e23a002247a---ropiwatix.pdfIn PDF document text
    • http://premiumresourcing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ed0d7188068---risevegukigufodo.pdfIn PDF document text
    • https://www.cocochan.com.pk/wp-content/plugins/super-forms/uploads/php/files/af0beb1d79fe6ba1fc78e8231ca4f5d2/25514248432.pdfIn PDF document text
    • https://home18.ru/wp-content/plugins/super-forms/uploads/php/files/0e5aee6ab10f1c0fbf6d7f4ff426e797/540676388.pdfIn PDF document text
    • https://zold-kommando.hu/files/zumuzugaxalotel.pdfIn PDF document text
    • https://emilline.dk/ckfinder/userfiles/files/70278685615.pdfIn PDF document text
    • http://chineseclothingonline.net/File/muwusajelomovu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=after+we+fell+downloadPDF 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_off0000d489.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD489 10152 bytes
SHA-256: 40d41cf981f53d57a88bb68a7588e0f78c9dcbb5d69c7f5a6a0210da63e3321a
font_01_sfnt_off0000eb71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB71 17500 bytes
SHA-256: 61c6dd15d03bba9331ecf08ec675ef81b4cc7ed93bdb2a8dfc17a58117e19119
font_02_sfnt_off0001186e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1186E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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