Malicious PDF — malware analysis report

Static analysis result for SHA-256 928585d8ebb48aab…

MALICIOUS

PDF

157.5 KB Created: 2021-06-27 23:47:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 098ad2acb346787555ec66ea772d3b81 SHA-1: e07379a30f0ccc9f7267f9176cdac9eabd074e9b SHA-256: 928585d8ebb48aab63283c760b90aa4b25b1ac54f4914deb56190ccfcd7e8287
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains numerous links to external websites, many of which appear to be compromised or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the nature of the heuristics indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9714

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 https://drafthe.ru/uplcv?utm_term=dua+to+get+rid+of+stress+and+anxiety PDF link annotation
    • http://laduses.nl/image/file/jizikovomogix.pdfIn PDF document text
    • https://www.cfo-search.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ce326d0c7f---puxuju.pdfIn PDF document text
    • https://xn----8sbaavnccwq4am.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/de62434097aa832e334f381198bda9d0/16334100488.pdfIn PDF document text
    • https://namastehealth.in/wp-content/plugins/super-forms/uploads/php/files/qhjfnaqfm81ve0c2u7g7gu05dk/66639780248.pdfIn PDF document text
    • http://digitalpolicycouncil.com/imagenes/file/89837534837.pdfIn PDF document text
    • https://bestofbucerias.com/upload/file/35314087809.pdfIn PDF document text
    • https://xo-sound.ru/userfiles/file/6279377827.pdfIn PDF document text
    • http://www.holderit.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d97ee8bda5---faletogexaremu.pdfIn PDF document text
    • https://holzhaus-suedtirol.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607aea5143505---36760591952.pdfIn PDF document text
    • http://karinameal.ru/imgdish/files/gudiloxajawebavewegixidap.pdfIn PDF document text
    • http://andreevmag.com/wp-content/plugins/super-forms/uploads/php/files/10a9600190c504ed8fd73610b0c0e9e0/mofanolovafatekepa.pdfIn PDF document text
    • http://cargo3030.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a65a546255b---53968986972.pdfIn PDF document text
    • https://newat.ru/wp-content/plugins/super-forms/uploads/php/files/a25b7bff2fff1913ed11eb6e89af1948/wopuxeresegi.pdfIn PDF document text
    • http://springswellness.net/wp-content/plugins/formcraft/file-upload/server/content/files/160782c73118ba---ruraligapolomokiwego.pdfIn PDF document text
    • https://pinotcar.com/wp-content/plugins/super-forms/uploads/php/files/0fca83c821b9d0fcbbf31c97e13ea217/94437331879.pdfIn PDF document text
    • http://beckydavidsonhomes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c194b401ed7---norajetomizovis.pdfIn PDF document text
    • http://www.melloecastro.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f5cab7d87d---46648866516.pdfIn PDF document text
    • https://wegofa.com/userfiles/file/44262201459.pdfIn PDF document text
    • http://aunay-sous-auneau.fr/ckfinder/userfiles/files/pitafogozenifidu.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a6a8f275afe---fuzuvak.pdfIn PDF document text
    • https://theshairpodcast.com/wp-content/plugins/super-forms/uploads/php/files/089d8d43143a3e421b2d8ba7f02b06c6/nuxarepifidetovijijex.pdfIn PDF document text
    • https://monarchwinemerchants.com/wp-content/plugins/super-forms/uploads/php/files/43e30e39a164afccccc4a081a039ecbb/gufaniwilujubudiwu.pdfIn PDF document text
    • http://therealmccoyfamilyreunion.com/clients/f/f9/f9ea119420dddc0cc5ac7622830b9f68/File/sezuz.pdfIn PDF document text
    • http://markasib.ru/ckfinder/userfiles/files/xotegusebetugisafaxigaxu.pdfIn PDF document text
    • http://lovewhereyoulv.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/e4e0943c19752adb4672790afd54eaca/93023293470.pdfIn PDF document text
    • 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off0001cd6e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x1CD6E 33820 bytes
SHA-256: c19b6b0436ddc742b72ec600bdc6f563b6556bad99488fa5f42d4e6a27d73817
font_01_sfnt_off000209c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x209C2 10800 bytes
SHA-256: 1dbd44d6d0e8439639e55008d4372f48a71012a798bdd6baa0e852f4348cbe54
font_02_sfnt_off000222a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x222A2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off00023ab4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x23AB4 16796 bytes
SHA-256: 5e20795fbc19c46d1a3cb6650864fb015fbf3214ab3aa3bd8403f04a57bdfd0e

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