Malicious PDF — malware analysis report

Static analysis result for SHA-256 09d5f2d8170fdc9a…

MALICIOUS

PDF

166.3 KB Created: 2021-07-28 00:56:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: d709c276a3e76d200731416b223e1d0e SHA-1: 810443708a83c831de48f4a1ba9f52401149e76a SHA-256: 09d5f2d8170fdc9a160750c70bbfd76237dbf2a08570b318ca1adea1bc874c89
156 Risk Score

Malware Insights

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

The PDF was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. It functions as a link farm, with numerous URLs pointing to various domains, some of which are associated with compromised CMS uploads or disposable hosting. The embedded URLs suggest an attempt to redirect users to potentially harmful content, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9825

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 http://nadiadsa.org/userfiles/file/botimazidelud.pdf In PDF document text
    • https://www.hadlowsecurityshutters.com/wp-content/plugins/super-forms/uploads/php/files/0196af674b2e1adf1c16f9c4c61dc223/71777967053.pdfIn PDF document text
    • https://betonwerkendejonge.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1606d52df514bf---72434428326.pdfIn PDF document text
    • http://riskhedgetech.com/uploaded/file/17886759660e0136899cb0.pdfIn PDF document text
    • http://aksaaydinlatma.com/img/editor/image/file/jorojafabenisedonine.pdfIn PDF document text
    • http://sellmysayarah.com/userfiles/files/11146933148.pdfIn PDF document text
    • https://planet-for-events.de/userfiles/file/devutudamiwexegatofe.pdfIn PDF document text
    • https://condominiovillage.com/userfiles/file/11432924463.pdfIn PDF document text
    • http://shosholoza.de/file/zowisuxupivo.pdfIn PDF document text
    • http://serendipityorlando.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083c0fb25ed2---43063151374.pdfIn PDF document text
    • http://shinies.ru/img/lib/file/65672456.pdfIn PDF document text
    • https://snabavto.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb9f98c3b1d---poxukejukaduxujapo.pdfIn PDF document text
    • https://jetzterstrecht.hamburg/wp-content/plugins/super-forms/uploads/php/files/0csbrbb62ercaomhbugnpnadr9/piloko.pdfIn PDF document text
    • https://lightsourceindiana.com/wp-content/plugins/super-forms/uploads/php/files/5ff448c4a57770088b29b5aaf6e4b425/20326429532.pdfIn PDF document text
    • https://www.sacproblemleri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160953c528123f---91531697173.pdfIn PDF document text
    • https://ddshower.com/ckfinder/userfiles/files/49146268630.pdfIn PDF document text
    • http://illinoislivestock.org/userfiles/file/fozozexuvozoge.pdfIn PDF document text
    • https://orkhaconstruction.com/wp-content/plugins/super-forms/uploads/php/files/o7sufk0mh2gof1ls4p488q7us7/xepobovalaxaz.pdfIn PDF document text
    • https://pharmnet.cz/ckfiles/files/files/bajigabugumekonedolupe.pdfIn PDF document text
    • http://georgeandmaryjones.com/clients/f/ff/ff66b05efb8f16ea353d8e6908bb1429/File/51790411507.pdfIn PDF document text
    • https://confetti-seasons.ru/upload/files/retunutorewaviv.pdfIn PDF document text
    • https://discoverapartmentsforrent.com/wp-content/plugins/super-forms/uploads/php/files/a2c895a8f15c99e78f342c829170715d/91280256393.pdfIn PDF document text
    • http://inglewoodreunion.com/clients/68690/File/82668537790.pdfIn PDF document text
    • http://ctkupavna.ru/upload/file/zoledofukuminuvixuxogopom.pdfIn PDF document text
    • http://asianmosaicnyc.com/userfiles/file/21435872590.pdfIn PDF document text
    • http://sumbulefendiegitimvakfi.com/resimler/files/merazij.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=ejercicios+de+gram%C3%A1tica+espa%C3%B1ola+pdfPDF 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_off0002243c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2243C 20144 bytes
SHA-256: f657c4a5cacb28bc25eea46cd9325a088c5b540a7da666ff6573241728eb94f1
font_01_sfnt_off00025639.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x25639 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00026e50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x26E50 11360 bytes
SHA-256: f3ffe2ba72e979db57424df529583cc660c4698b5eee2502d3fbda408283b90f

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