Malicious PDF — malware analysis report

Static analysis result for SHA-256 2946db65d4302239…

MALICIOUS

PDF

83.9 KB Created: 2021-07-19 03:47:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 21b8780d5a53058b74682463d99fe82e SHA-1: 19c802b54c911d55f0d5868b6c62595e0e298d8e SHA-256: 2946db65d4302239b45864945a7004faee2c520899224b2f4ecac58c08247aca
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous embedded URLs pointing to compromised WordPress sites, indicating a link farm designed to redirect users. ML and ClamAV detections confirm its malicious nature, specifically flagging it as a phishing trojan. While no scripts were directly extracted, the nature of the embedded links suggests an attempt to exploit vulnerabilities or deliver further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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.pharmaright.ca/wp-content/plugins/super-forms/uploads/php/files/8step7669oon46k3rstk5uaap1/jeselitel.pdf In PDF document text
    • http://lushexperiences.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c4ee631fb4---ludakuxinupuxolosazi.pdfIn PDF document text
    • http://nhasachconggiao.com/luutru/files/vegevujinexaxofiwisa.pdfIn PDF document text
    • https://www.hinogas.com/wp-content/plugins/super-forms/uploads/php/files/97ho85kldfvsnqp7hm2a2u072a/dokidizeriziju.pdfIn PDF document text
    • http://sarahscupcakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608640bfc0224---gegumifime.pdfIn PDF document text
    • https://slavica.ru/wp-content/plugins/super-forms/uploads/php/files/02f1be255c21c94c56eb08c550f6bc83/wozuxuxalozonemudas.pdfIn PDF document text
    • https://www.traveltimevipp.com/wp-content/plugins/super-forms/uploads/php/files/1515fe5d4379ccdc1c3696b40fea0e29/tavedozekarirusamu.pdfIn PDF document text
    • http://kencert.vn/uploads/image/files/renirixepirodaf.pdfIn PDF document text
    • http://elitaliaweb.it/upload/file/fomuleri.pdfIn PDF document text
    • http://casier-a-bouteilles.com/file/nugolo.pdfIn PDF document text
    • https://retentionstudentexperience.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f627a100cc---fevadawuwegofutovofijojo.pdfIn PDF document text
    • https://m-co.de/wp-content/plugins/super-forms/uploads/php/files/fkehsfptl0j1m934afbkl351pj/70556647263.pdfIn PDF document text
    • https://dangeloremodeling.com/nbloom/fckuploads/file/pafizebukazududug.pdfIn PDF document text
    • http://saintthomasmonrovia.org/clients/a/a7/a774d5b45fc75aba9c6fcf07501e1e58/File/86756222354.pdfIn PDF document text
    • http://abpaluso.com/upload/file/3679037804.pdfIn PDF document text
    • http://bettaletroom.com/file_media/file_image/file/meputasukarivefagise.pdfIn PDF document text
    • https://toyotaautobody.com/ckfinder/userfiles/files/52816993018.pdfIn PDF document text
    • http://webinside.pl/userfiles/file/67578659527.pdfIn PDF document text
    • https://elicopter-de-inchiriat.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16099f95204dee---29058058846.pdfIn PDF document text
    • https://www.endthestigmacounselling.com/wp-content/plugins/super-forms/uploads/php/files/drru1rah4ivnltsbev5bdq3au9/47211216387.pdfIn PDF document text
    • https://abicecream.ru/ckfinder/userfiles/files/lulevo.pdfIn PDF document text
    • https://www.nosolodespedidas.es/wp-content/plugins/formcraft/file-upload/server/content/files/16071b58c73bf1---wujulidubive.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=jack+merivale+and+vivien+leighPDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e5f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5F8 10580 bytes
SHA-256: 5308082fd1592b737356fc839c94024a97c25ea38379356fe46c8b1bcf8fd5d1
font_01_sfnt_off0000fda9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDA9 17188 bytes
SHA-256: 447a13405f9af99a141f8e2bf46aa803e281764da2ebb2a86e4eaa5ab3111481
font_02_sfnt_off00012a5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A5F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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