Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3addd4f0518e643…

MALICIOUS

PDF

80.0 KB Created: 2021-09-21 07:22:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: e657424a06804d273ca71569c4b5df12 SHA-1: 9cfd38bc1c4b521fa9fd0fc4b8b98b57d5779f12 SHA-256: f3addd4f0518e64363daf82f51cfc3a4122b52edda394976540425f513d7bd65
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which appear to be hosted on compromised CMS platforms or disposable domains, suggesting a phishing or malware distribution campaign. The heuristic 'ML_NYX_PDF_MALICIOUS' and ClamAV detection strongly indicate malicious intent. The embedded URLs and link farm structure are designed to redirect users to potentially harmful content, likely for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://pixomot.ru/uplcv?utm_term=download+theme+lucu+untuk+android PDF link annotation
    • https://millvalley.com/wysiwygfiles/file/tijumebasododejili.pdfIn PDF document text
    • http://www.hkwebdesign.com.hk/wp-content/plugins/formcraft/file-upload/server/content/files/16141392220f67---41492821483.pdfIn PDF document text
    • https://elitestrategyglobal.com/wp-content/plugins/super-forms/uploads/php/files/d3bcecb76cf1e8212832f02acc0f29f5/34674418816.pdfIn PDF document text
    • http://conblocmanado.com/pics/file/jegibezagug.pdfIn PDF document text
    • http://revize-elektro.info/UserFiles/File/puvasirigoluripomenaz.pdfIn PDF document text
    • https://militarynetwork.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1613bdaf905f68---gakoregezomogizasuzo.pdfIn PDF document text
    • http://dc-a0dcf319a153.breakthroughsport.com/userfiles/files/88243089189.pdfIn PDF document text
    • http://elandtour.com/FileData/ckfinder/files/20210916_AD8159CBFCED0A86.pdfIn PDF document text
    • http://krzysztofmalec.pl/gfx/fck/file/puvubuvunibabobubeb.pdfIn PDF document text
    • http://igabana.com/upfolder/e/files/20210916155429.pdfIn PDF document text
    • http://alvasari.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c15ac6200d---13930397124.pdfIn PDF document text
    • http://novafish.it/userfiles/files/33285934052.pdfIn PDF document text
    • https://messianic.live/wp-content/plugins/super-forms/uploads/php/files/8777505096d8db425404f0e60177aff8/3015064692.pdfIn PDF document text
    • https://ecpa.fr/uploaded/file/54372604232.pdfIn PDF document text
    • https://alteanetworks.fr/img/file/75288372849.pdfIn PDF document text
    • http://ipsaix.com/ckeditor/ckfinder/userfiles/files/53177989459.pdfIn PDF document text
    • http://fivelscope.net/fckimages/fujogowot.pdfIn PDF document text
    • https://flylights.pl/wp-content/plugins/super-forms/uploads/php/files/731roulgcd06rtttragugv76b6/jalitajow.pdfIn PDF document text
    • http://romovi.net/sgi_userfiles/userfiles/files/83520269865.pdfIn PDF document text
    • https://www.phuketvillarentalandservices.com/ckfinder/userfiles/files/kipebifusivosofabakeniz.pdfIn PDF document text
    • http://moonlightmontessori.com/upload/files/gunonukokinanebezanol.pdfIn PDF document text
    • http://hzeiger.com/userfiles/file/toxin.pdfIn PDF document text
    • https://sicurezzaips.it/uploads/file/93906031298.pdfIn PDF document text
    • 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_off0000d78d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD78D 10748 bytes
SHA-256: 2f038151e6aa9bb17d9ca64f69388c191ff8686ebaaf380c8c60a2e94684cec0
font_01_sfnt_off0000f00d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF00D 16428 bytes
SHA-256: c2e15251375053927951ec88916922909875cb66a5aa4a576a3bda4c19c0921a
font_02_sfnt_off00011a4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A4B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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