Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8b4bb572d613cc5…

MALICIOUS

PDF

84.1 KB Created: 2021-07-07 04:55:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 5661ef6f20cdb64276a6800e00446d35 SHA-1: 627aa8603ef55b4111a2021479aa90aae91197ca SHA-256: e8b4bb572d613cc596b2c6dc1f7e1411d4e4e4138c838404e3a1ae8432487152
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document has been identified as malicious by ML classifiers and ClamAV, indicating it is a phishing or trojan delivery mechanism. The document functions as a link farm, containing numerous URLs that redirect to potentially compromised websites or disposable hosting. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an intent to lure users to malicious sites, likely for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

Heuristics 7

  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://zxpgw.com/userfiles/file/29682850723.pdf
    • https://leesman.com/wp-content/plugins/super-forms/uploads/php/files/a667db4c080e6d5b60c42b05c98fed1f/8922741194.pdf
    • https://infypos.com/infyposcms/media/44660096780.pdf
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/mhqo5vin4mi8ojcgf93qoi5a14/godefepeg.pdf
    • https://xn----8sbaavnccwq4am.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/62d35b085335a199fe61faf9be643d1b/29958306070.pdf
    • http://ncdesign.it/userfiles/files/kumoxanimuxonajabafiputov.pdf
    • https://asiahijau.com/contents//files/wupavinuronu.pdf
    • http://terapeutickemasaze.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1609b1c1d6b4ae---95379826046.pdf
    • http://valleypainclinic.org/userfiles/file/78367475436.pdf
    • https://www.carlosfunes.es/wp-content/plugins/formcraft/file-upload/server/content/files/160c8d8d2708ba---gilinon.pdf
    • https://www.lesson-online.org/wp-content/plugins/super-forms/uploads/php/files/31hok6sck1tbvk3r69stn123f2/61168226041.pdf
    • https://expresstestingatl.com/wp-content/plugins/super-forms/uploads/php/files/dfb827e6d5f3e293f199e866d16b12b2/votupijof.pdf
    • http://israel-aliya.com/wp-content/plugins/super-forms/uploads/php/files/72d1735483133bfda4c5fd09894d348c/65354244304.pdf
    • https://room12shio4.com/contents//files/libexetok.pdf
    • http://dirabrealtors.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa58297cf4f---gamadanumufifivasinel.pdf
    • http://daonshop.com/files/fckeditor/file/63175342824.pdf
    • http://artecgroupservices.com/imagenes/file/vanoduduripuw.pdf
    • http://lilit-realty.com/wp-content/plugins/super-forms/uploads/php/files/ukp5gg7c1msk6h164ks53vfun1/fizekuxelaxik.pdf
    • http://ciskmv.com/css/file/3382056556.pdf
    • http://domeinbeverdonk.be/assets/files/file/nakulubagimabonulu.pdf
    • http://www.airportlimofortlauderdale.net/wp-content/plugins/formcraft/file-upload/server/content/files/16077b6bb8f7e0---gidafusimopijakuzu.pdf
    • https://fablab808.com/nbloom/fckuploads/file/bupizavowokuxa.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=8ft+by+10ft+in+cm
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e32a.bin
73b13fefa63f8aab13ceaf6e773bb96a27c22f295e700849ef5341fedf5f4eec
pdf-font-stream PDF embedded font (sfnt) at offset 0xE32A 18408 bytes
font_01_sfnt_off000112b0.bin
2e225f5b5be751d36a1ab7591d592e46ca6cc374ba63aee3b56af90157956ff8
pdf-font-stream PDF embedded font (sfnt) at offset 0x112B0 10308 bytes
font_02_sfnt_off000129f8.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x129F8 16792 bytes