Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5e6d872a10d9386…

MALICIOUS

PDF

79.1 KB Created: 2021-08-11 13:57:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 55880bb8d7881d0e6ffe9b3dcc06b985 SHA-1: 48995ad194f0e1dc74029ca65f9eb359ee6be4cb SHA-256: f5e6d872a10d938672bf5522ade984e16059a76ce07723f7614f79c36cf4e3b2
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged as malicious by ML classifiers and ClamAV. It contains numerous links, many pointing to compromised WordPress sites and disposable hosting, suggesting a link farm or phishing lure. The presence of embedded URLs and the nature of the heuristics indicate that the PDF is likely intended to redirect users to malicious external sites, potentially for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

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://longvu.vn/Images_upload/files/89387243503.pdf In PDF document text
    • http://verduciautodemolizioni.it/userfiles/file/11086939993.pdfIn PDF document text
    • https://www.guestquesttravelmedia.com/wp-content/plugins/super-forms/uploads/php/files/6hhi993aus6j5q1hn23gopjk0k/73459560838.pdfIn PDF document text
    • http://tortsurprise.ru/upload/redactor/files/38363416876.pdfIn PDF document text
    • http://www.haztartasigepszakuzlet.hu/pics/file/55239275528.pdfIn PDF document text
    • https://beribuket.ru/wp-content/plugins/super-forms/uploads/php/files/2fd70947e9a2559687a4846db8e333e2/54296226044.pdfIn PDF document text
    • http://devison-matras.com/upload/file/3329104605.pdfIn PDF document text
    • https://www.potterycommercials.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160986e9faf31c---83463089632.pdfIn PDF document text
    • http://findplusltd.com/file/77952725830.pdfIn PDF document text
    • http://www.drop-lok.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610e6a88aa780---sidorudegaxe.pdfIn PDF document text
    • http://mackielaw.net/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/30329821405.pdfIn PDF document text
    • http://mobilni-kadernictvi.cz/files/file/20933526659.pdfIn PDF document text
    • http://bularz-auto.pl/images/userfiles/file/55383800072.pdfIn PDF document text
    • http://clubselectionvoyages.com/images/file/nomane.pdfIn PDF document text
    • http://fantasypartyentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/161131ec21d66d---bapijomurabapiwusivu.pdfIn PDF document text
    • http://allprintusa.com/admin/images/file/wiwotefimoxinefurosuw.pdfIn PDF document text
    • https://teplitsyoptom.ru/wp-content/plugins/super-forms/uploads/php/files/f140e9900623c391992589435387507f/jifetirizozizox.pdfIn PDF document text
    • https://anukulagrotech.com/userfiles/file/34276612222.pdfIn PDF document text
    • http://jucal.es/images/file/jisewodotiso.pdfIn PDF document text
    • https://projetovm.com/uploads/files/nitiwubowifan.pdfIn PDF document text
    • https://action-roofing.com/wp-content/plugins/super-forms/uploads/php/files/f04258b0115f2301bc165c176a3e7aee/womaxewuk.pdfIn PDF document text
    • http://bigyikesmedia.com/home/xtremweb/public_html/consultinstitute/web/upload/files/goput.pdfIn PDF document text
    • http://faizleathergloves.com/userfiles/files/korepebukiveramu.pdfIn PDF document text
    • https://babetravelling.com/ckfinder/userfiles2/files/63980498820.pdfIn PDF document text
    • https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077bceda22e0---61593125912.pdfIn PDF document text
    • http://31kouqiang.com/userfiles/file/1622892718.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=vishnu+sahasranama+sanskrit+pdf+gita+press+free+downloadPDF 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_off0000cf9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF9B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e7b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7B2 11192 bytes
SHA-256: 28bf33621862b96b76c1a9f1cef54e749ed282485ab73c399aec166406552beb
font_02_sfnt_off0001018c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1018C 16984 bytes
SHA-256: dcd2b15d8957ef33ccc6fd6486e301657699f1f18827043e729b551354094b28

Open this report in the interactive analyzer, or submit your own file for analysis.