Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd2660e5d6e3a0d7…

MALICIOUS

PDF

82.4 KB Created: 2021-09-15 17:53:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 5bcab72f8459b4f97a645107433266e8 SHA-1: 3e1f03109b0a4ec8f3eb945a77653b6d92dc6d6d SHA-256: fd2660e5d6e3a0d752e3e95dc2c7a63c41343a2d9a45c94af31104f89bebe918
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as a phishing trojan and ML classifiers indicated a high probability of maliciousness. It contains embedded JavaScript and numerous external URIs, many of which point to compromised WordPress sites or disposable hosting, suggesting it functions as a link farm to distribute malicious content or conduct phishing. The embedded JavaScript likely facilitates the redirection to these malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://ketchas.ru/uplcv?utm_term=privacy+safe+android PDF link annotation
    • http://mtt-association.fr/upload/file/piferixa.pdfIn PDF document text
    • http://chanhbon.vn/media/ftp/file/gawikinomerosozimugar.pdfIn PDF document text
    • https://registracijakoncar.com/webroot/js/ckfinder/userfiles/files/fafoxuruzofubuvojamafaxe.pdfIn PDF document text
    • https://pfgmm.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1613ef823a5811---jefamedelelabubetaki.pdfIn PDF document text
    • http://www.itbaloch.com/wp-content/plugins/formcraft/file-upload/server/content/files/16140781065dfb---10562263569.pdfIn PDF document text
    • https://bizdrive.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/1613c7f0c27504---31852198723.pdfIn PDF document text
    • https://bizimpin.com/calisma2/files/uploads/88230842381.pdfIn PDF document text
    • http://szentistvanpatika.hu/upload/file/xakenato.pdfIn PDF document text
    • http://leeandrewdavison.com/download/27221084400.pdfIn PDF document text
    • https://susta.vn/userfiles/file/meripisabapivopubigepirux.pdfIn PDF document text
    • https://wasael.com/userfiles/file/tadafopa.pdfIn PDF document text
    • https://mlspoland.co/files/file/zabuxuwogezejale.pdfIn PDF document text
    • http://www.kinoimaging.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16141ffa23ba20---dutotepe.pdfIn PDF document text
    • http://barrarioservicos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613e1645b7765---12842744178.pdfIn PDF document text
    • http://gediklimakinahidrolik.com/resimler/files/36170397538.pdfIn PDF document text
    • https://akemi.ro/hirek/file/fafalapevoleleluzumog.pdfIn PDF document text
    • http://bamila.vn/luutru/files/26557881468.pdfIn PDF document text
    • https://seikai.jp/free_images/files/43398270218.pdfIn PDF document text
    • http://gingerwooddesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a514db5f2d---60871691463.pdfIn PDF document text
    • http://tabouligrill.com/ckfinder/userfiles/files/7129340514.pdfIn PDF document text
    • https://indiantiffin4me.com/nbloom/fckuploads/file/dageridazajixemudiwobir.pdfIn PDF document text
    • http://career-id.org/ckfinder/userfiles/files/sonenatujitudoxoxulilemes.pdfIn PDF document text
    • http://myslizdrave.com/soubory/xerevovalele.pdfIn PDF document text
    • https://endobible.com/userfiles/file/lusaxixujulipilu.pdfIn PDF document text
    • https://pisausakti.com/contents/files/nuzolumodijedo.pdfIn PDF document text
    • https://stehovani-ostrava.cz/static_pages_files/file/7156820442.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_off0000dcf1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCF1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f503.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF503 17996 bytes
SHA-256: 17aa19766db7029279e04f137e5301ead695ee4629bde7ad9be88f0bed5277f6
font_02_sfnt_off000123b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123B3 10504 bytes
SHA-256: 302960b8a69bf6bedb3961265844d950d1e4087998f554acec7196084e64af76

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