Malicious PDF — malware analysis report

Static analysis result for SHA-256 94f81f2960ebd0b4…

MALICIOUS

PDF

80.5 KB Created: 2021-09-18 05:45:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 118fdd659e6514b6dc2fb95cc819d4d7 SHA-1: ed1e58b3ae29c8a9b223d60da7b3400593c2a923 SHA-256: 94f81f2960ebd0b4fbdec43b144252f351f13c3efff95235959298d8c3ed5f1a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating it's likely a phishing or malware distribution lure. It functions as a link farm, with numerous embedded URLs pointing to websites hosted on compromised CMS platforms, such as WordPress. These links likely lead to further malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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://photographerin.agency/wp-content/plugins/super-forms/uploads/php/files/e17f30jtnml4u6kvf6addng1s6/gometitekapev.pdf In PDF document text
    • https://khanoomhoteli.com/basefile/khanoomhotelicom/files/44334594126.pdfIn PDF document text
    • https://rt-totaalafbouw.nl/userfiles/file/68193927287.pdfIn PDF document text
    • http://ccswcd.com/userfiles/file/podelexagijuta.pdfIn PDF document text
    • https://patoman.ro/ckfinder/userfiles/files/21392642958.pdfIn PDF document text
    • http://kondicionery-vidnoe.ru/upload_picture/file/35409688071.pdfIn PDF document text
    • http://dabien.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/16139dcf0d2660---tewaludexakefusiwujoka.pdfIn PDF document text
    • https://highfieldhousehotel.net/nbloom/fckuploads/file/zilisilevosisik.pdfIn PDF document text
    • http://www.offshoreyachts.net/web_upload/editor/files/85900609465.pdfIn PDF document text
    • http://alltimescare.com/attachment/files/fimebi.pdfIn PDF document text
    • http://krasneclanky.cz/uploads/zurepanimikilesubexipo.pdfIn PDF document text
    • http://polipadel.com/userfiles/file/79203899252.pdfIn PDF document text
    • http://slkuang.com/v15/Upload/file/2021951858266484.pdfIn PDF document text
    • http://pilatesmystyle.com/userfiles/files/duxekobawelojaxepixo.pdfIn PDF document text
    • http://immodraft.de/images/architekten_agentur_images_/file/kezelepimobilijiduk.pdfIn PDF document text
    • https://viveironativodevicosa.com.br/ckfinder/userfiles/files/2231229033.pdfIn PDF document text
    • http://admio.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16131697bbf688---10267404039.pdfIn PDF document text
    • http://frutapacargentina.com/ckfinder/userfiles/files/risatiwujotoxin.pdfIn PDF document text
    • https://gruntbudowa.pl/files/file/49020382170.pdfIn PDF document text
    • http://dokumsuzgec.com/userfiles/files/52627302276.pdfIn PDF document text
    • http://tourister.kr/userfiles/file/rojixexosiduxalibixufu.pdfIn PDF document text
    • http://hunting.kg/userfiles/file/roboku.pdfIn PDF document text
    • http://dabien.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/1613803afcfc4b---35790209157.pdfIn PDF document text
    • https://qualitygums.com/userfiles/file/muwozumorij.pdfIn PDF document text
    • https://armagedonspedycja.pl/files/file/83286537355.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=how+to+make+a+cartoon+video+on+androidPDF 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_off0000d688.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD688 17896 bytes
SHA-256: cd8d0e361cc19ba647e38524909b3589cc6baccf1dd251245b9af5164c94130d
font_01_sfnt_off00010413.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10413 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011c2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C2A 10552 bytes
SHA-256: 4081f58109a3ccd32ff1709c50497bbeb1ac774d31036d356987351e1803a332