Malicious PDF — malware analysis report

Static analysis result for SHA-256 32cb9cd949d7efb6…

MALICIOUS

PDF

82.2 KB Created: 2021-07-01 19:57:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: c5d90bbc143b0c56a2ccacab207bc083 SHA-1: 15d3a308e3b985c8321d40fb7dff97e68c69098e SHA-256: 32cb9cd949d7efb628c1ee21ec326efb669ffeedb3f76fccda4c296a97508557
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised CMS upload directories or disposable hosting, indicating a link farm designed to lead users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9933

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://synergyproperty.com/images/files/zepadenaraxazonopomeba.pdf In PDF document text
    • http://aarogyamedico.com/userfiles/file/tibemafinebabe.pdfIn PDF document text
    • https://www.varishastalari.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607501b9c8b29---getolasagote.pdfIn PDF document text
    • http://hitecds.com/userfiles/file/bobukawuxijewupofuririj.pdfIn PDF document text
    • https://schreinerheusi.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609fba35ba837---50629196125.pdfIn PDF document text
    • https://bataretak.com/img/files/file/fefuxil.pdfIn PDF document text
    • https://specialbrands.gr/wp-content/plugins/super-forms/uploads/php/files/3d0d91a7284d28d4240a005cb0455ffe/dakidejagivegefeb.pdfIn PDF document text
    • https://tirthmobile.com/wp-content/plugins/super-forms/uploads/php/files/umsn43rdaaddgmulf77bqsgirf/39899836307.pdfIn PDF document text
    • http://www.qookspot.kitchen/wp-content/plugins/formcraft/file-upload/server/content/files/160ad3e7cb2e0b---divofaxikuzivo.pdfIn PDF document text
    • https://shared401k.com/wp-content/plugins/super-forms/uploads/php/files/dc1ca420ec4e8c666b288e5a78bc9658/99042949693.pdfIn PDF document text
    • http://cortabellanews.com/userimages/nevevugejujup.pdfIn PDF document text
    • http://sieckultury.pl/wp-content/plugins/super-forms/uploads/php/files/31b6b2036eb83d1800f5df9e4f0bea43/29889626269.pdfIn PDF document text
    • https://avvocatoboretti.it/file/sumapopafanapipow.pdfIn PDF document text
    • https://3dreamstudios.com/wp-content/plugins/super-forms/uploads/php/files/d50133670d561c180a82221355dc120a/29715984131.pdfIn PDF document text
    • http://cgl.lu/userfiles/files/69047336111.pdfIn PDF document text
    • http://vipavtoufa.ru/wp-content/plugins/super-forms/uploads/php/files/404dd47de16b35214bb62b2558ea8633/49686523851.pdfIn PDF document text
    • https://vinacomvietnam.vn/uploads/news_file/94902221005.pdfIn PDF document text
    • http://nguyenthaotech.com/upload/files/87073350731.pdfIn PDF document text
    • http://www.highlandmetals.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1607a56c478efe---58640144749.pdfIn PDF document text
    • http://xn----8sbnbd9chja.xn--p1ai/userfiles/file/63793036915.pdfIn PDF document text
    • https://csom.cz/wp-content/plugins/super-forms/uploads/php/files/30809614a25f969d86e4e72675d0dda8/mobojitanoburakezizusir.pdfIn PDF document text
    • https://china-glass-mosaic.com/userfiles/files/20210621_034323.pdfIn PDF document text
    • http://softwarefactory.nl/images/file/goworokalupadopisoj.pdfIn PDF document text
    • http://stellamaris.cz/userfiles/dazoguxoxinunibu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=hairy+muscle+dudesPDF 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_off0000c6ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6ED 16640 bytes
SHA-256: 5db21afb75fa6af256a3538c29f7e17c3e4f2072668d875bd4fa990b077dbca0
font_01_sfnt_off0000f24d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF24D 10416 bytes
SHA-256: 7bc66e7014b3398eb94fe4b8bf246c16c833542ac14c5e32697438b44d88d288
font_02_sfnt_off000109d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109D9 16896 bytes
SHA-256: f73279835209ce7ae84697ae309ebdee1582295129d0a15078bd34b3a7c3283f
font_03_sfnt_off000121a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121A6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1