Malicious PDF — malware analysis report

Static analysis result for SHA-256 fffe1ab0c669a2b9…

MALICIOUS

PDF

658.9 KB Created: 2021-06-28 04:27:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 161db03321d79bb79aa3aba4a396286e SHA-1: 0f86e3f580595e5f8dc9a1db6b663f046a8053dd SHA-256: fffe1ab0c669a2b9392ef4a6f1df502004475c2d9d9bb8fc01a13005d66aba59
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing attempt. The document contains language suggesting it is an invoice or payment request, a common lure for users to open malicious attachments. Multiple external URLs are embedded, many pointing to compromised WordPress sites, likely serving as download locations for further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6289

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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://huntic.ru/uplcv?utm_term=143+ipc+in+tamil
    • http://gtshotel.it/images/file/72052692038.pdf
    • https://srp-galabau-rostock.de/wp-content/plugins/super-forms/uploads/php/files/gpds110adt500i0e2hkha19t54/kubiwagomogimejobap.pdf
    • https://www.intermediastudios.com.mx/wp-content/plugins/super-forms/uploads/php/files/741ccff7eb56111295c3ea74b30e7d29/xinifagimiwokekekeba.pdf
    • http://altaprecision.com/userfiles/file/54104537054.pdf
    • http://willtorock.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cad60e5d5a0---gowexonozezujo.pdf
    • https://mebelpozakazu.ru/wp-content/plugins/super-forms/uploads/php/files/25e512741f8bfe6dffb64e53d4b23114/18995180401.pdf
    • https://evocative.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1608207c780d18---mutupujibigoj.pdf
    • http://quickfix-poland.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd0f1a68361---47043403964.pdf
    • http://veterani-pushkino.ru/userfiles/files/didiwaxugovorasox.pdf
    • https://www.hagensmarketing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607183372c6e6---92248746903.pdf
    • http://vngo-cc.vn/cooker/public/files/24797492438.pdf
    • http://accessiblevehicleservices.com/userfiles/file/73603721801.pdf
    • http://nw-line.ru/generic/uploaded/73579718365.pdf
    • http://www.altrus.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16096901d02421---logum.pdf
    • https://phase1acoustics.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cdf7504974---jesad.pdf
    • http://plusbateria.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096fac801ef5---mofawi.pdf
    • http://raduzhniy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc8252bc33d---nurapezuxalabanesof.pdf
    • https://maidintown.co.uk/wp-content/plugins/super-forms/uploads/php/files/a990b516ecde4f786bc7e75f9e1c6cb7/lodinipafilizabumiki.pdf
    • https://inclinedigital.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099a5dd2c2cc---14466151910.pdf
    • https://turkihale.com/userfiles/file/78654548097.pdf
    • http://baanpowertrain.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072adc42e904---4067192937.pdf
    • https://www.birdandwildlifeteam.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab397fbb1e4---35689835827.pdf
    • http://argra.rs/wp-content/plugins/formcraft/file-upload/server/content/files/16090e59220a4e---rexatedujilulexiwasuwajak.pdf
    • http://windowsplusllc.com/ckfinder/userfiles/files/71281873018.pdf
    • http://www.sarajevo-inn-grunewald.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c9330ece8f---rivuvubijuzopazanitat.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0009df23.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x9DF23 16792 bytes
font_01_sfnt_off0009f743.bin
4d428540199632b92b19927150d6891b4eded0882a079783083b4d4d0dc6f240
pdf-font-stream PDF embedded font (sfnt) at offset 0x9F743 10220 bytes
font_02_sfnt_off000a0e38.bin
02a25382442bc52ebfaabeb7061b6340ca48f8b1d7e5b3a011b9f7a463ea5a71
pdf-font-stream PDF embedded font (sfnt) at offset 0xA0E38 16928 bytes