Malicious PDF — malware analysis report

Static analysis result for SHA-256 5732247c8380545e…

MALICIOUS

PDF

83.6 KB Created: 2021-09-17 15:31:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 15e5ff64ef4d045db60f28663fc24b1e SHA-1: bbd40f64ccde641ce62d1f7f028d0cbe945a37b7 SHA-256: 5732247c8380545e34654890a600c1f9d97b01810cffab53d706aad0d0ef4d3a
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF sample was flagged by ClamAV as Pdf.Phishing.Trojan and exhibits characteristics of a link farm, with numerous URLs pointing to compromised CMS uploads and disposable hosting. The presence of a 'download button' heuristic suggests a lure to trick users into downloading malicious content. While no scripts were explicitly extracted, the PDF structure and URL patterns indicate an attempt to deliver a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9833

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://catamma.ru/uplcv?utm_term=forza+horizon+3+apk+android PDF link annotation
    • http://limeitec.com/upfiles/editor/files/gegufujegegevovavodimiva.pdfIn PDF document text
    • http://mannaz.pl/userfiles1/file/totafivefoditigutevone.pdfIn PDF document text
    • http://dynamicyunnan.com/ckfinder/userfiles/files/47796243313.pdfIn PDF document text
    • http://www.tempshift.com/app/webroot/files/uploadimagesfile/dakujovime.pdfIn PDF document text
    • https://pianotuningdarwin.com/userfiles/files/37810364395.pdfIn PDF document text
    • http://sumisaedu.com/FileData/ckfinder/files/20210905_4A4F0F7DE0216DF5.pdfIn PDF document text
    • http://www.garriagricola.com/wp-content/plugins/formcraft/file-upload/server/content/files/16142967c74ba5---35435645173.pdfIn PDF document text
    • http://alconsprom.ru/ckfinder/userfiles/files/kovune.pdfIn PDF document text
    • http://www.victorian-manor.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/161380fc989b47---bixilureve.pdfIn PDF document text
    • https://stef-nancy.fr/upload/document/zijomexow.pdfIn PDF document text
    • http://hatowo.com/app/webroot/uploads/files/mopofofumugigijim.pdfIn PDF document text
    • http://www.iciparis.ru/ckfinder/userfiles/files/rigujoximijudiwisifiziv.pdfIn PDF document text
    • http://www.brennholz-heinlein.de/wp-content/plugins/formcraft/file-upload/server/content/files/161368f29ebe14---bimowutabofema.pdfIn PDF document text
    • http://lnianemarzenie.pl/userfiles/file/67001427496.pdfIn PDF document text
    • https://temporar.mirceaseminee.ro/printuri-fi/files/95898128684.pdfIn PDF document text
    • https://shriramsteels.in/public/ckfinder/userfiles/files/56106669893.pdfIn PDF document text
    • https://wsbtitan.com/images/file/85887039015.pdfIn PDF document text
    • https://pingthye.com/userfiles/files/pemagiragejogena.pdfIn PDF document text
    • https://www.cfo-search.com/wp-content/plugins/formcraft/file-upload/server/content/files/161357c57940b2---53771372608.pdfIn PDF document text
    • http://grupomarsamo.com/wp-content/plugins/formcraft/file-upload/server/content/files/161323546a3f53---41186345245.pdfIn PDF document text
    • http://prunay-en-yvelines.fr/ckfinder/userfiles/files/mumefafopipizanupamik.pdfIn PDF document text
    • http://creaorganization.com/depo/sayfaresim/file/xakovusesunobiraf.pdfIn PDF document text
    • http://61kidsclub.com/userfiles/file/93402652725.pdfIn PDF document text
    • http://z-him.ru/userfiles/file/rimutalagamexariluw.pdfIn PDF document text
    • https://pastravariaizvoarelebratiei.ro/images/file/89405037923.pdfIn PDF document text
    • https://dogathermalhotel.com/resimler/files/23966585702.pdfIn PDF document text
    • http://naoshima-tours.com/images/blog/file/koxuzuso.pdfIn PDF document text
    • 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_off0000e060.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE060 19016 bytes
SHA-256: 4e8e6b23adce714c729b3c74d1424f921688978665697f48c5e57c688eee78e8
font_01_sfnt_off0001115c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1115C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012973.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12973 10348 bytes
SHA-256: 0e9cbe051c19d3f273f90105f50c9c2b2fb84d0de2e9c22caf9aa1e644bbc140

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