Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7ee3cf6054adb9a…

MALICIOUS

PDF

78.8 KB Created: 2021-09-22 23:26:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 103fd60bcca005480d8b973d11dd42d7 SHA-1: 262b1aef8b86563c20a63d87862ba464e8ca6f32 SHA-256: c7ee3cf6054adb9a39a467b9fd33a356740260c32a40e46da124361596c7ec45
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV identifying it as a phishing trojan. It functions as a link farm, containing numerous URLs pointing to potentially compromised or disposable hosting domains. The primary purpose appears to be directing users to malicious websites, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9958

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://rhondadejean.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/siroviboluduzuvejerega.pdf In PDF document text
    • https://highrise.pl/file/zukujazubonatujirode.pdfIn PDF document text
    • https://motodubai.com/uploaded_images/files/58283050172.pdfIn PDF document text
    • https://lynnesnaturaltreats.com.au/wp-content/plugins/super-forms/uploads/php/files/22f825bde73c6c03aa9940dfca1233d1/rupefe.pdfIn PDF document text
    • https://haps.company/wp-content/plugins/super-forms/uploads/php/files/218821893730307a7dc4709d51df7042/wosajine.pdfIn PDF document text
    • http://vipforiraq.com/userfiles/files/tamarimowifi.pdfIn PDF document text
    • http://vet-spb.com/userfiles/file/jonoboziguwo.pdfIn PDF document text
    • http://wbbray.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136292e7ca84---26704505173.pdfIn PDF document text
    • https://85097781.com/upload/files/47479047476.pdfIn PDF document text
    • https://impulsa.mantareys.net/uploads/plantillas/files/vavewo.pdfIn PDF document text
    • http://kdekdyjak.cz/data/vezowizigufezeregoduvemo.pdfIn PDF document text
    • http://biemmecommerciale.eu/userfiles/files/17272897019.pdfIn PDF document text
    • http://ferien-in-zahren.de/images/file/27559588919.pdfIn PDF document text
    • https://augsburger-dartliga.de/uploads/file/43352404464.pdfIn PDF document text
    • https://www.almuhja.com/ckfinder/userfiles/files/jofode.pdfIn PDF document text
    • http://erkerlaender.de/wp-content/plugins/formcraft/file-upload/server/content/files/1614078c568176---gosafelepevobesavidi.pdfIn PDF document text
    • http://maidichike.com/upload/files/bufinavenevugurawu.pdfIn PDF document text
    • http://molenat-energies.fr/molenat.com/images/editor/file/73666943459.pdfIn PDF document text
    • http://swiss-ex.com/images/blog/file/55159578431.pdfIn PDF document text
    • https://dichvumoinoi.com/ckfinder/userfiles/files/zurolizokuwumebi.pdfIn PDF document text
    • http://lambanghieuquangcaogiare.net/vietkiendo/upload/file/72503616058.pdfIn PDF document text
    • http://staresecurity.com/userfiles/file/5253410824.pdfIn PDF document text
    • https://gretajensen.com/ckfinder/userfiles/files/nunim.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=new+iphone+hotspot+not+workingPDF 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_off0000d366.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD366 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000eb78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB78 16648 bytes
SHA-256: 95874324b4727c13a2dcbb90cc162d53710bf6588ee347537847798fa7a0793a
font_02_sfnt_off0001163e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1163E 10476 bytes
SHA-256: 61f6650f40ba843d1aa41047424bbb2f85984d896db861bc719970d77f0d748b