Malicious PDF — malware analysis report

Static analysis result for SHA-256 4710437247332167…

MALICIOUS

PDF

84.4 KB Created: 2021-07-09 23:51:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 6319f5aa92782e47ec534e44495218a9 SHA-1: 3e1f49d2f968f4209b629c9a915fe5ac9e69abda SHA-256: 47104372473321673d64a136176b5691ed5fd8c455d8a4a66adcc11bae0d38c9
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, indicating a link farm or phishing lure. The ClamAV detection and ML classifier strongly suggest malicious intent, specifically identified as a phishing trojan. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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 https://www.asahinafunnels.com/wp-content/plugins/super-forms/uploads/php/files/0t88u5mcr7o1jou7ot9io3v6qg/wedimavexebe.pdf
    • http://earthtalismanjewelry.com/clients/b/b2/b27d4d76c51cd35ccef873a204118430/File/55400150180.pdf
    • https://planet-for-events.de/userfiles/file/wejegebasu.pdf
    • https://gruppopolidori.com/upload/image/file/jexog.pdf
    • http://xn----8sbpvg0afdbe.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/rigm2m5ergdhlqkepsub2knp47/lubodorofisutiripurageme.pdf
    • http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/703beabebae48c1ab70e427ae6f6c6d1/35406316425.pdf
    • http://lotuscourtpune.com/wp-content/plugins/super-forms/uploads/php/files/13t9lkhlun45i69kr644508sm7/82706031140.pdf
    • http://nuyewrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/9c4265622d34f9050c2e41c8a58157fa/53126951248.pdf
    • https://www.cocochan.com.pk/wp-content/plugins/super-forms/uploads/php/files/5e434d3f7ef44b45d510893860a699fc/zunifabebinobixemarepemip.pdf
    • http://subventionsbetrug.de/wp-content/plugins/super-forms/uploads/php/files/tpfprji7ovbdnou9fqlcb47uhi/12385888848.pdf
    • http://wilkinsconnection.com/clients/9/94/94ba1e7d864c5c8af3bb481f5f9f31de/File/kakanikawij.pdf
    • http://indovinandoilmondo.it/themes/userfiles//files/dikenikobin.pdf
    • https://propbrains.com/wp-content/plugins/super-forms/uploads/php/files/amem4ga4muin1jrlujevalsv94/bazejizepopesufu.pdf
    • http://dabien.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/1607b9ed2d484d---88168837947.pdf
    • http://biswasi.com/userfiles/files/81368844837.pdf
    • http://3handseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606e52f0a21bd---disevafuxoja.pdf
    • https://messianic.live/wp-content/plugins/super-forms/uploads/php/files/93a967db2b66ffe2232ccf139e5ed6cd/karososokezutuloxu.pdf
    • http://garantc.ru/userfiles/file/25047124784.pdf
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/1607307f3dc231---65469072004.pdf
    • http://sts-logistika.ru/wp-content/plugins/super-forms/uploads/php/files/ac56bdcc10fc63a15d38fb6a00dde933/dulewigiluker.pdf
    • http://quaint-house.com/33105106305.pdf
    • http://www.pianoszimmermann.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607cc23b4b587---4447153720.pdf
    • https://www.harasportcenter.com/wp-content/plugins/super-forms/uploads/php/files/ccd72tpjrco99l7keokd5fb4ch/famasijeduxesogedilagi.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=to+scale+up+meaning
    • 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_off0000e7ef.bin
29582fd5dd7a3eb3103214b347090ce6b03f84ffe923d1d68b573b0b04a7677b
pdf-font-stream PDF embedded font (sfnt) at offset 0xE7EF 17112 bytes
font_01_sfnt_off00011492.bin
dbd3759fedbc7f44958ecaa500ba399689134dd98c82ff766530e3d7cd051381
pdf-font-stream PDF embedded font (sfnt) at offset 0x11492 10580 bytes
font_02_sfnt_off00012cb9.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12CB9 16792 bytes