Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b250d298eb3d900…

MALICIOUS

PDF

82.5 KB Created: 2021-09-05 21:05:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 09ef2fd2e4738adf07344d6f0c0a45a9 SHA-1: 010744a859190b9cb44b45153a9865551bf0e75b SHA-256: 3b250d298eb3d90064e0bc4e7763f01769c8ab2d648311d82bc7056b8c119d32
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

The PDF contains numerous links pointing to compromised websites, indicating a link farm designed to redirect users to malicious content. ClamAV detected this file as Pdf.Phishing.Trojan, and ML classifiers also flagged it as malicious. The presence of external URIs and link farms suggests an attempt to lure users to potentially harmful sites, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.modianodesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077f0942f672---1838251165.pdf In PDF document text
    • http://kingspec.su/wp-content/plugins/super-forms/uploads/php/files/694eqc22fablar1rcuphq5kfgu/77469476762.pdfIn PDF document text
    • http://sieckultury.pl/wp-content/plugins/super-forms/uploads/php/files/db5966ee2cd9386a29e3d429223e0b19/semewepo.pdfIn PDF document text
    • https://www.frankcapassoandsons.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612b7f5567a08---37384610274.pdfIn PDF document text
    • http://starlightcelebre.org/clients/4/43/43e9139217482d7666ce300faf566241/File/lavuxepexujavavur.pdfIn PDF document text
    • https://masini-de-ambalat.ro/images/userfiles/pikafamujejodobam.pdfIn PDF document text
    • http://yourbuilding.ru/userfiles/files/kudetanirewupeki.pdfIn PDF document text
    • https://ewms.vn/wp-content/plugins/super-forms/uploads/php/files/01af8kht57ig8048keom06la1s/nirogojezigusipam.pdfIn PDF document text
    • http://pi-consulting.ch/download/65525519266.pdfIn PDF document text
    • http://dokumsuzgec.com/userfiles/files/94940672512.pdfIn PDF document text
    • http://ginzaoakland.com/uploads/files/93553284523.pdfIn PDF document text
    • http://lukinserv.hu/file/57180636461.pdfIn PDF document text
    • https://cosanuesa.com/componentes/editor/ckfinder/userfiles/files/nebanoxise.pdfIn PDF document text
    • http://buildinggodskingdom.com/webcms/file/besidenekemidog.pdfIn PDF document text
    • http://parcfamilyreunion.com/clients/b/b3/b3ae52aef0329bb57e848b27182677c8/File/kiwas.pdfIn PDF document text
    • https://hainutedecopii.eu/ckfinder/userfiles/files/xorilojejez.pdfIn PDF document text
    • https://www.corridar.com/wp-content/plugins/super-forms/uploads/php/files/hlmtiikrjaho2er3t3na34m0nc/56179070889.pdfIn PDF document text
    • https://binarbaidrealestate.com/public_html/userfiles/file/nafesekixeduwuje.pdfIn PDF document text
    • http://innotack.com/userfiles/files/65847609209.pdfIn PDF document text
    • http://quanhoangtsi.com/upload/quangtri/files/zitutosufudegonepomo.pdfIn PDF document text
    • https://europeancustomtailor.com/wp-content/plugins/super-forms/uploads/php/files/4972a276b5d299dbae07d33e0204c190/83691085620.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=south+african+lease+agreement+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_off0000de02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE02 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f619.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF619 11244 bytes
SHA-256: d11caf30b6c93a6e7b3a1765a6149872ca1a440350e9a27ae6a34a6c89f987da
font_02_sfnt_off0001100e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1100E 17220 bytes
SHA-256: ca0d98c43345df68cd6a9c9a8f0baff7fa2f30d153221a616a93f0d372ba967f

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