Malicious PDF — malware analysis report

Static analysis result for SHA-256 0982a96013f69fbd…

MALICIOUS

PDF

96.5 KB Created: 2021-09-17 15:46:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 1ae88fa1e9324de8f29f9efada0a1332 SHA-1: 4e052ecb210b52f7c8c3c7cf16673fa4c9e3c7e1 SHA-256: 0982a96013f69fbdb586012f81a9971b632811f02b8760048cb5d29f37374468
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to compromised websites and disposable hosting, indicating a link farm designed to redirect users. The presence of ML and ClamAV detections, along with the heuristic findings of compromised CMS uploads and link farms, strongly suggests malicious intent. While no scripts were explicitly extracted, the nature of the links and the PDF structure point towards a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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://irlanc.ru/uplcv?utm_term=pok%C3%A9mon+diamond+and+pearl+gba PDF link annotation
    • http://www.akutrans.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614407d0a28ba---bireneboxijotalopomujalar.pdfIn PDF document text
    • https://phr4u.com/files/70732177103.pdfIn PDF document text
    • http://europeanprofservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613bef04c7f51---semezano.pdfIn PDF document text
    • http://wildpflanzen-planung.de/file/texugowagawubatejudewu.pdfIn PDF document text
    • http://espacioschillout.es/images/admin/file/25874467738.pdfIn PDF document text
    • https://www.elementstraining.co.uk/wp-content/plugins/super-forms/uploads/php/files/9863b1ue67recsq2513hiug3ft/36081499170.pdfIn PDF document text
    • https://www.gpaci.org.br/cms/ckfinder/userfiles/files/72472208768.pdfIn PDF document text
    • http://jun-travel.com/userfiles/file/zavafurut.pdfIn PDF document text
    • http://ana-jsc.com/upload/files/wixofobofitugezoputuk.pdfIn PDF document text
    • http://longtra.vn/userfiles/file/kokoron.pdfIn PDF document text
    • http://biblioteka-belzec.pl/upload/files/werujejivuzuwemipifo.pdfIn PDF document text
    • http://mq-water.net/upload/gurovixufoki.pdfIn PDF document text
    • http://stopasbestos.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1613fe02811b6f---sedidusubiveb.pdfIn PDF document text
    • https://madhubanindiancuisine.com/nbloom/fckuploads/file/xelaxafosozawuvevozi.pdfIn PDF document text
    • https://qian-ho.com/upfiles/editor/files/jebegini.pdfIn PDF document text
    • https://ganport.pl/userfiles/file/28186604148.pdfIn PDF document text
    • http://dreambeauty.kr/upload/fckeditor/file/raxiwagorofinukuxidewo.pdfIn PDF document text
    • http://skup-laptopow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136d3a16f11f---wejekukuxenejobor.pdfIn PDF document text
    • http://infinivideo.hu/sites/infinivideo/files/pogiva.pdfIn PDF document text
    • http://big-blue-bus.com/pics/fotos/1/file/pojanemefuje.pdfIn PDF document text
    • https://yingzhaoliuart.com/upload/file/88109992873.pdfIn PDF document text
    • https://ever-progress.com/upload/files/lazalajirufawoturi.pdfIn PDF document text
    • https://lacausedeslivres.com/userfiles/file/mujenevarivapexakife.pdfIn PDF document text
    • https://augsburger-dartliga.de/uploads/file/denomimewugow.pdfIn PDF document text
    • http://naturenhuman.com/app/webroot/userfiles/file/kutivunetezob.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_off00010b13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B13 20872 bytes
SHA-256: da53380bbb3401169ada427ab30a84041d205be59af23d1f507d6df87e0db927
font_01_sfnt_off00014210.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14210 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00015a27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15A27 10856 bytes
SHA-256: 7f39bb2057cfc028799de7be4bd9c9c18f221ec7cb64ea1e4e9a8efaf9eeabdf

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