Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a198f9ac972ebd8…

MALICIOUS

PDF

100.8 KB Created: 2021-06-26 04:53:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: ce07d9d817d220501d8b04ba7dc0b007 SHA-1: 5e19263f39858d86eb6925443a89308ecdd15457 SHA-256: 9a198f9ac972ebd8e4642865da47d0f23fea244cbfb22f922df051faedb4b8ac
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised WordPress sites, suggesting a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9887

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://www.deadclan.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160925d7e82e84---3733299831.pdf In PDF document text
    • https://eclipsetheaters.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085725251487---fodoxukoluwebomow.pdfIn PDF document text
    • http://adamlegal.com/userfiles/file/78486426277.pdfIn PDF document text
    • http://finsura-lifedirect.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1609ed52cc8202---38623411456.pdfIn PDF document text
    • https://www.advids.io/wp-content/plugins/formcraft/file-upload/server/content/files/16075af3579478---54206636380.pdfIn PDF document text
    • http://sarahscupcakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082f60a8bfda---pazinixuziriwal.pdfIn PDF document text
    • http://mattstergamer.com/wp-content/plugins/super-forms/uploads/php/files/d5slp18u7oioolspa7unrb9ls4/63094177872.pdfIn PDF document text
    • https://3dreamvr.com/wp-content/plugins/super-forms/uploads/php/files/ec878062dcd06f880f0486a18e49776d/woviwalu.pdfIn PDF document text
    • http://rosniyom.com/userfiles/files/15300266253.pdfIn PDF document text
    • https://edusfera.pl/upload/file/8736793120.pdfIn PDF document text
    • http://www.skupp.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16091143b0095d---fobesedajisoxapoza.pdfIn PDF document text
    • http://kazenergy.kz/wp-content/plugins/formcraft/file-upload/server/content/files/1607dd01141df7---gebedipurupil.pdfIn PDF document text
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/hlt5qfjuqa5gd4dtn5r99mbhg1/gopuz.pdfIn PDF document text
    • https://flylights.pl/wp-content/plugins/super-forms/uploads/php/files/qpfas1u17pt7ua3sdvp5699sm8/mezurowe.pdfIn PDF document text
    • http://temple.mo/userfiles/file/61243417457.pdfIn PDF document text
    • http://multiseal.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/160a8ca56c4c3b---daboludanapexufiduxixet.pdfIn PDF document text
    • http://pensjonatagat.pl/userfiles/file/tinekanora.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aced137ad8a---67466469383.pdfIn PDF document text
    • https://iword.de/userfiles/file/33788340081.pdfIn PDF document text
    • https://2greenchicks.com/wp-content/plugins/super-forms/uploads/php/files/78b5080b66f4ff54de22b9d797db0104/kafisizibedagomodo.pdfIn PDF document text
    • https://egyiksem.hu/uploads/file/gimilikirukifamubexeko.pdfIn PDF document text
    • https://comodee.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a49526df4bd---wukug.pdfIn PDF document text
    • http://hongdacable.com/d/files/16857979518.pdfIn PDF document text
    • http://twfindia.in/userfiles/files/fosikurogejatixuruka.pdfIn PDF document text
    • https://masterok-kovka.ru/wp-content/plugins/super-forms/uploads/php/files/6f1ed0077a9ade94162a42ad642c2cdf/4014371771.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=counting+by+7s+reviewPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010fed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FED 17452 bytes
SHA-256: 4a7a6f95023fdb99ae4515a51168d89333a5b12170af15cd5a76abd0cacb5a2d
font_01_sfnt_off00013d6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D6A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00015581.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15581 10660 bytes
SHA-256: 40a0e5f36cdcaea882272b1877d68f41d59c6b9eb23fa9e61a37a04bed374a10
font_03_sfnt_off00016e45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16E45 16860 bytes
SHA-256: 2375a5bf03f5d369027548eabcf70b6656bddf3ff7d15275ad1da74f9baf08d1