Malicious PDF — malware analysis report

Static analysis result for SHA-256 f702704fbc336b1d…

MALICIOUS

PDF

78.6 KB Created: 2021-09-13 09:31:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 9844c919ba36680a8d9ba578f506a182 SHA-1: 7292c12921f69994bdd325ca3df488cef5d72756 SHA-256: f702704fbc336b1dd0f2ccbdf8c36f79ce9412115d4590134febb7d916d9d7ad
156 Risk Score

Malware Insights

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

The PDF file contains numerous links, many pointing to disposable hosting or compromised CMS uploads, suggesting a link farm designed to distribute malicious content. The presence of a 'download beamng drive apk android' URL in the feedproxy link, combined with the ClamAV detection as 'Pdf.Phishing.Trojan', indicates a phishing or malware distribution attempt. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with techniques used to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

Heuristics 6

  • 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.
  • 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://severstroysnab.ru/userfiles/file/xoduzuv.pdf In PDF document text
    • http://e-hematologica.com/users/file/85029843298.pdfIn PDF document text
    • https://thietbixanh.net/uploads/files/vepibowodosirigajasazir.pdfIn PDF document text
    • http://uat2.hkha.com.hk/ckfinder/userfiles/files/ramiwakuror.pdfIn PDF document text
    • http://bigbulkbags.ahmadpackages.com/survey/userfiles/files/21720116268.pdfIn PDF document text
    • https://adlinefor.com/home/webagen/public_html/korn/data/file/duxar.pdfIn PDF document text
    • https://paloaltospeakerseries.com/wp-content/plugins/super-forms/uploads/php/files/1d5c21681275b90c29a1890366aa2c30/63315082346.pdfIn PDF document text
    • http://frickcontrols.com/uploads/files/keguwasukomezo.pdfIn PDF document text
    • https://eurotig.ro/file/mipapijivevuwa.pdfIn PDF document text
    • http://sky1981.com/asset/uploads/files/15447767269.pdfIn PDF document text
    • https://zakarpattya-tour.com/upload/mofonugivubisixasezo.pdfIn PDF document text
    • https://ngoctraithaibinhduong.com/uploads/news_file/13907958374.pdfIn PDF document text
    • https://cruiseship.cruises/wp-content/plugins/super-forms/uploads/php/files/nvtnj0tpfd7jqibo8qkvb651up/rajerasamotilipuwuk.pdfIn PDF document text
    • http://impressivetravelvietnam.com/upload/files/vasoromufutuxanu.pdfIn PDF document text
    • https://nexapos.com/upload/files/kegesol.pdfIn PDF document text
    • http://aaaexpressheating.com/userfiles/file/munovuzagapivabej.pdfIn PDF document text
    • https://movie2book.com/userfiles/file/63317837045.pdfIn PDF document text
    • https://webvitamin.vn/app/webroot/uploads/files/98104280980.pdfIn PDF document text
    • http://nitecoreromania.ro/files/file/mafifozomekorekudutozu.pdfIn PDF document text
    • http://finalbrand.cz/upload/file/viranero.pdfIn PDF document text
    • https://aurorabersinar2.com/contents/files/91853571464.pdfIn PDF document text
    • http://akcjonariusz.com/UserFiles/file/38046736673.pdfIn PDF document text
    • http://tcsklife.com/filespath/files/20210913025028.pdfIn PDF document text
    • http://hanauhrova.cz/files/64346169434.pdfIn PDF document text
    • https://flylights.pl/wp-content/plugins/super-forms/uploads/php/files/qjq9cm5v0eg55d9v6el1us7kqs/tefadeduvovasepesuwajijex.pdfIn PDF document text
    • https://anpheatingandac.com/nbloom/fckuploads/file/remabizirowosuwoze.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=download+beamng+drive+apk+androidPDF 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_off0000cee9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEE9 17364 bytes
SHA-256: fc3d4fd912cb1717ac776b146413a476567b4f765bcd8385fa0995f6795feb23
font_01_sfnt_off0000fbc0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBC0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000113d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113D7 10856 bytes
SHA-256: 52839838b504571379087f07485608a33eca80a7d8f37496d287d7647344da25

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