Malicious PDF — malware analysis report

Static analysis result for SHA-256 d020b2083e82041a…

MALICIOUS

PDF

83.8 KB Created: 2021-07-01 00:25:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-04
MD5: dd90ffa02b3f6cd1ba84bf5e05f1a925 SHA-1: 9b4d1cd33074a9bcd03c4b8ec03f3c400c5f5ba2 SHA-256: d020b2083e82041a70991e80a4b2580de903bf5600534e606b542866945a3265
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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 https://creativesilhouettes.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160bdb903afb4b---90550008475.pdf In PDF document text
    • http://iwish-cosmetics.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070be471d1c4---73346970484.pdfIn PDF document text
    • https://khanikango.in/file/zixizidina.pdfIn PDF document text
    • http://admio.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a980909d279---mumalulolufalarupitevew.pdfIn PDF document text
    • https://borderpak.com/wp-content/plugins/super-forms/uploads/php/files/3650e6efb9603923eec7bedd2803dcd3/60376824441.pdfIn PDF document text
    • https://greshamgilessalon.com/wp-content/plugins/super-forms/uploads/php/files/6561c231868733231082bbbc941bdfe3/xudujodinobuzobisa.pdfIn PDF document text
    • https://parkettworld.com/upload/files/loxubok.pdfIn PDF document text
    • http://bluekeydigital.com/images/pic/file/mazirijunof.pdfIn PDF document text
    • http://wksystems.net/HotelEstimator/userfiles/file/wabegozafameka.pdfIn PDF document text
    • http://esistore.be/userfiles/file/ligebupefuvan.pdfIn PDF document text
    • https://big-cash.de/wp-content/plugins/super-forms/uploads/php/files/ioh708q1p1l9jcng4trp62ka4v/rader.pdfIn PDF document text
    • https://limmaginebistrot.com/file/58101869066.pdfIn PDF document text
    • https://nationalcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094223e75d8c---salobeganeb.pdfIn PDF document text
    • https://atlanthealth.com/wp-content/plugins/super-forms/uploads/php/files/8bc17175cf26cb375118e71b60c09e1d/32430556053.pdfIn PDF document text
    • http://asesorgubernamental.com/images/file/wewevesesumekosus.pdfIn PDF document text
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/ec35d7d7fef988a7d760456a3b091d4d/sutudopig.pdfIn PDF document text
    • https://g-ortho.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b0b9482700f---binuvegejagusanedozu.pdfIn PDF document text
    • https://www.hdontheroadnapoli.it/wp-content/plugins/formcraft/file-upload/server/content/files/160bc1450177ac---padego.pdfIn PDF document text
    • https://xo-sound.ru/userfiles/file/kotutesuraw.pdfIn PDF document text
    • https://honkakuji.jp/honkakuji/images/ckfinder/files/pawebofemujagujavejada.pdfIn PDF document text
    • https://www.higher-energy-trampolineclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/160857639b6641---77496427093.pdfIn PDF document text
    • https://jaiminsales.com/ckfinder/userfiles/files/bemifivu.pdfIn PDF document text
    • https://www.nobleorthodontic.com/wp-content/plugins/super-forms/uploads/php/files/bde35bcdb48dee2cb1fa429989ed8305/90776441495.pdfIn PDF document text
    • https://asiajitutop.com/contents//files/67133446665.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=today%27s+verse+and+prayerPDF 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_off0000e5d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5D1 17376 bytes
SHA-256: 3c7f1217670b132dbd61765e9972e6454e0072829f882066586ddd598c729755
font_01_sfnt_off000112a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112A6 10328 bytes
SHA-256: e4fb5f3eca2e166776e197bd30135f07df5e5127a94f2b52d30f9342b0a57a73
font_02_sfnt_off00012a21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A21 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1