Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc31255a7dcd7ba5…

MALICIOUS

PDF

70.0 KB Created: 2021-09-19 17:22:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 3d1c409fc1189c3a993b874ba85aab47 SHA-1: 789b08fe4bf8a254b02dce615eedff8a95b30d68 SHA-256: fc31255a7dcd7ba577873d74e84d186cf2d02f5caf33d8f6018e7089660fa743
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm designed to redirect users to various download sites, with a specific lure for a PS2 emulator. Several URLs point to compromised CMS uploads or disposable hosting, indicating a phishing or scam attempt. While no scripts were directly extracted, the PDF structure and URL patterns are consistent with malicious document delivery mechanisms.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://lmleadmanagement.com/userfiles/files/zasiresuwegenajuronokow.pdf In PDF document text
    • http://www.musicmaestrodiscos.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/161331342815cf---gejisuxuxasiwalixa.pdfIn PDF document text
    • http://gocoachfox.com/userfiles/file/ramuwozomewofibemuwuror.pdfIn PDF document text
    • http://kristiankutschera.de/userfiles/file/zukud.pdfIn PDF document text
    • https://terrebleue.org/userfiles/file/1696713602.pdfIn PDF document text
    • http://osheamaloneynylaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/24486559340.pdfIn PDF document text
    • http://clinicaveterinariaalbese.eu/userfiles/files/jojizu.pdfIn PDF document text
    • https://reparationmobile.net/userfiles/file/vazaw.pdfIn PDF document text
    • http://school19-zav.ru/userfiles/file/88229612012.pdfIn PDF document text
    • http://zekejozsef.eu/FCKfeltoltott/file/28796283064.pdfIn PDF document text
    • http://lamarchesainterita.be/lamarchesainterita/imgdb/news/files/26287990904.pdfIn PDF document text
    • http://ronaldtan.nl/images/photo/nufosewif.pdfIn PDF document text
    • https://erdenetpost.mn/userfiles/files/ditawimeselamuzejisez.pdfIn PDF document text
    • http://gallery4walls.com/upload/editer/file/40984535959.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c20f5c5dc6---dofuxuvaf.pdfIn PDF document text
    • http://studiorestagno.eu/userfiles/files/wapid.pdfIn PDF document text
    • http://andreuma.madteam.net/ckfinder/userfiles/files/zokozamejewepotegox.pdfIn PDF document text
    • https://webgirls-studio.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139f453c674f---14403689358.pdfIn PDF document text
    • http://umffz21.ru/admin/ckfinder/userfiles/files/64809288090.pdfIn PDF document text
    • http://maimungkorn.com/UserFiles/file/kajifivurebume.pdfIn PDF document text
    • http://prasongp.com/file_media/file_image/file/zowenugamafaraj.pdfIn PDF document text
    • http://bayernglobal.de/userVZ/file/82241786810.pdfIn PDF document text
    • https://storage-in-motion.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613078c15558d---zarajinijapafawoga.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=download+game+emulator+ps2+for+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_off0000b245.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB245 15080 bytes
SHA-256: bc9f96efe18d0416e12cae9c920421daea0220a525d60d81ece06c7bb05fac1f
font_01_sfnt_off0000d871.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD871 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f088.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF088 11148 bytes
SHA-256: 499065aa9fe6de776d19925ce4596bceb890ab49220a1031448c0c689d28bb94