Malicious PDF — malware analysis report

Static analysis result for SHA-256 98d932cee960a027…

MALICIOUS

PDF

75.6 KB Created: 2021-09-02 03:24:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 954fc3ab9689cd805641a775015af87a SHA-1: 0ceee118b8842d441e0d0d2da26d80ab1edb23b3 SHA-256: 98d932cee960a027ae006488aef7f6146dc2b0d48bd2e3af9c9d8b14340f3a4e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a link farm with numerous URLs pointing to compromised WordPress sites, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the structure and URL patterns are consistent with malicious PDF lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9957

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://elenasteele.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f8b67f1bf6---ladadononevonadamaf.pdf In PDF document text
    • https://web-sila.ru/wp-content/plugins/super-forms/uploads/php/files/f14536019af02aa565249828a18f0a2f/jolunumevebis.pdfIn PDF document text
    • http://theopenhouseclub.com/wp-content/plugins/super-forms/uploads/php/files/555c5ebff39f865a1dcb34b0e101c14a/80560960889.pdfIn PDF document text
    • http://aps-mes.com/files/file/nubopezukuraxevulipofat.pdfIn PDF document text
    • https://avenirpourtous.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160a6c55a72cbf---vixizixanomebopuwed.pdfIn PDF document text
    • https://globalazeri.az/wp-content/plugins/super-forms/uploads/php/files/7dabe4vstokq1l9jke1gphqc00/dulasilekobajopafimak.pdfIn PDF document text
    • https://skazkavdom.com/wp-content/plugins/super-forms/uploads/php/files/9b0fc4e8f03d390c711b374dd03d1c44/jasipipemi.pdfIn PDF document text
    • http://albatrossmrn.com/konadnew/userfiles/file/buporewovuzutu.pdfIn PDF document text
    • https://mvmdigital.gr/files/files/2783879655.pdfIn PDF document text
    • http://pastoret.it/userfiles/files/14220849474.pdfIn PDF document text
    • https://pomacanthe-art.fr/imagebeforeafter/files/fupujadidunopepofurulebis.pdfIn PDF document text
    • http://hasanmasat.com/ckfinder/userfiles/files/miwojolabudujamebopaw.pdfIn PDF document text
    • http://hrudolf.com/userfiles/jenilozepifixuvumegop.pdfIn PDF document text
    • https://mithermomix.com.mx/wp-content/plugins/super-forms/uploads/php/files/f6e23a317d7fe01c6ce67e22ebc145ab/23750700476.pdfIn PDF document text
    • http://mid-europe-ex.com/images/blog//file/laxijabekuwogonujug.pdfIn PDF document text
    • http://innovatepc.com/userfiles/file/kipujuvewumajidopebil.pdfIn PDF document text
    • https://www.audifonosdoshoydos.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b4555410d2c---rapisetarogola.pdfIn PDF document text
    • http://mitroc.com/userfiles/file/genubojos.pdfIn PDF document text
    • http://dzstock.com/Upfiles/file/45947414091.pdfIn PDF document text
    • http://potya.com/85824470324.pdfIn PDF document text
    • https://www.cukoyem.com.tr/wp-content/plugins/super-forms/uploads/php/files/emhkfmtg4q2r6jdldcolf8kal3/83394801768.pdfIn PDF document text
    • http://utuin.net/files/fckeditor/file/defosikevevewenimo.pdfIn PDF document text
    • http://administratieindex.nl/images/uploads/23641562160.pdfIn PDF document text
    • http://suphammamnon.org/uploads/files/7211129539.pdfIn PDF document text
    • https://www.idromeccanicasrl.com/idromeccanicasrl.com/wp-content/plugins/super-forms/uploads/php/files/622b996c1a933ca9d6e38d9e4606bbe2/xuxarikuvafagosojobazu.pdfIn PDF document text
    • https://visaonline-vn.com/wp-content/plugins/super-forms/uploads/php/files/ug6pm5p79dh8tnosv4sqba1p12/87720416396.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=free+boost+mobile+reboost+pin+numbers+pdfPDF 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_off0000c370.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC370 16984 bytes
SHA-256: 0e01c676f862cf4187b8ec7e0f64ff4df7f4d3c090884ed789b4c2b3247a5e78
font_01_sfnt_off0000efc1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFC1 10712 bytes
SHA-256: f0afb5147a55aa33fc2631c8a81539efa144ad8ca49416cea4e626d262afed18
font_02_sfnt_off0001080f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1080F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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