Malicious PDF — malware analysis report

Static analysis result for SHA-256 2036b14180d46015…

MALICIOUS

PDF

84.0 KB Created: 2021-09-07 12:57:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: c2031a9cdb7c696df09a0faf94464bbe SHA-1: eec5534515e54bcbe16f3a5d001dc56f39768486 SHA-256: 2036b14180d46015a69500d1ad597add9fa6d02f58ff9ae6603a87ffec18a417
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier as malicious. It contains numerous links, many pointing to compromised websites or disposable hosting, indicating a link farm designed to redirect users. The presence of multiple external URIs and link farm heuristics strongly suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://smartraoptics.com/fck_filemanager_upload/file/lofipabevesifepaxegapu.pdf In PDF document text
    • http://crisismobile.com/ckfinder/userfiles/files/75833131446.pdfIn PDF document text
    • https://koffiewarenhuis.nl/app/webroot/files/userfiles/files/tiruvujasokanoradomekum.pdfIn PDF document text
    • https://megatekspb.ru/sites/default/files/uploads/tekuwetinifolikikebiruxe.pdfIn PDF document text
    • https://massagetheory.ca/wp-content/plugins/super-forms/uploads/php/files/b620c4a27e5d56fab9156746cd30f3e0/64278258553.pdfIn PDF document text
    • https://simovi.mx/wp-content/plugins/formcraft/file-upload/server/content/files/16079721df2e1c---gusujanusomevikaz.pdfIn PDF document text
    • http://uptownfallschurch.com/uploads/files/85593776666.pdfIn PDF document text
    • https://barcelona-health.com/files/galeria/files/67642053774.pdfIn PDF document text
    • https://coastalholidayproperty.com/ckfinder/userfiles/files/midipoka.pdfIn PDF document text
    • https://www.baptistenhardenberg.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1606f1485c7d21---53175633571.pdfIn PDF document text
    • https://pasarantogel.com/contents//files/tilikipix.pdfIn PDF document text
    • http://topopentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160af98c3efa8a---fonekewogelavuwizuzedi.pdfIn PDF document text
    • http://classtool.info/upload/files/1134933709.pdfIn PDF document text
    • https://inchirieriavioane.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16074485918d3c---49411351484.pdfIn PDF document text
    • http://ambulatorioveterinariorigolon.eu/userfiles/files/bimifirubizepo.pdfIn PDF document text
    • http://woori-tour.kr/FileData/ckfinder/files/20210701_13281A15C79F48D5.pdfIn PDF document text
    • http://pulsrmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f888260dfc9---sudivedexigemesesosafu.pdfIn PDF document text
    • http://fpsh1980.com/clients/7/7d/7de5299bd6bdc19cdd6b275c058e9c4a/File/75522961255.pdfIn PDF document text
    • http://skuplaptop.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1607bb9b6e81fd---35462474188.pdfIn PDF document text
    • https://xn--80aaaglcftt5alesfkk7f.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/fd4f8411d0d086ed8e183603e70fe602/sagelowix.pdfIn PDF document text
    • http://state-lithium.com/upload/files/nunugujavezibu.pdfIn PDF document text
    • http://skuplaptop.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1607b65c0a99e1---55359967631.pdfIn PDF document text
    • https://alkhairi.co.uk/wp-content/plugins/super-forms/uploads/php/files/7f9ad1090f9b94dfff192edb3b839640/36325086160.pdfIn PDF document text
    • http://aarogyamedico.com/userfiles/file/29664927139.pdfIn PDF document text
    • http://lotuscourtpune.com/wp-content/plugins/super-forms/uploads/php/files/v3lfcp5c68pqlu8ru30bpkgk64/55335089036.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=basic+hydraulic+formulas+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_off0000deb0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEB0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f6c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6C2 19544 bytes
SHA-256: e5c7ba05ff75731a79858038efb775fa3dc95d70da97bf89e6bf94374709f295
font_02_sfnt_off0001296e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1296E 10816 bytes
SHA-256: f2d391032a299222f8bbc90254d00466478c0fa3aa590eb6f98291690b2688cb