Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a9c7d4122c53bab…

MALICIOUS

PDF

86.7 KB Created: 2021-07-31 18:11:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 0457965bdd6c981a20a8136184e515d5 SHA-1: d769ced65c69e72c216d16693f542cd7194a29b2 SHA-256: 3a9c7d4122c53baba448dfcb50d8ed8f27ba1e7741a6f118b3e5a0ba034caa93
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating it is a phishing or trojan distribution attempt. It functions as a link farm, with numerous embedded URLs pointing to various websites, including those hosted on compromised CMS platforms. The primary goal appears to be directing users to potentially malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

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://banghetretruc.com/media/ftp/file/34135525816.pdf In PDF document text
    • https://www.kadeavenue.com/wp-content/plugins/super-forms/uploads/php/files/65b151663ca761a46dbd7f068a65b8ea/pazomediwokivatugepuroru.pdfIn PDF document text
    • http://livestreaming.group/wp-content/plugins/super-forms/uploads/php/files/e3vecq26k0m683p16qp2h7f9k9kvk6fi/74403909932.pdfIn PDF document text
    • http://www.infranetltd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f3cf0c957bb---73161127831.pdfIn PDF document text
    • http://seednseed.com/admin/fckfiles/file/guxiperoro.pdfIn PDF document text
    • http://sewakendragroup.com/userfiles/file/30685031689.pdfIn PDF document text
    • https://archltginc.com/wp-content/plugins/super-forms/uploads/php/files/ad5f10fd2c8f80b6eef2bb348180b839/44822754873.pdfIn PDF document text
    • http://elturo.ru/img/upload/files/91818014102.pdfIn PDF document text
    • http://rayhovietnam.vn/upload/files/fakisaxobiwewukemobig.pdfIn PDF document text
    • http://www.barankayalar.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16096863fbf376---58276817972.pdfIn PDF document text
    • http://chhsclassof70.com/clients/1/1f/1f6d1b94cf555b90b9f410dfa82aea5f/File/xawokijujab.pdfIn PDF document text
    • https://fietenhaardenenkachels.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16082317a5f548---fumajux.pdfIn PDF document text
    • https://braviengenharia.com.br/wp-content/plugins/super-forms/uploads/php/files/do30jsj0qnvkvmkvslmi9qveek/16183509653.pdfIn PDF document text
    • http://www.playerclub.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16084e625996f7---74332169702.pdfIn PDF document text
    • http://qualityspices.in/ckuploads/files/61749182044.pdfIn PDF document text
    • http://elma-itc.ru/!upload/files/33849289434.pdfIn PDF document text
    • http://anhuizhkj.com/upload_fck/file/2021-7-27/20210727042331214208.pdfIn PDF document text
    • http://photographybynami.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1e47b43cb3---leloduxo.pdfIn PDF document text
    • http://vinhomeshaiphong.net/app/webroot/img/files/getumozitudox.pdfIn PDF document text
    • http://www.studiolegalefusimorelli.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607dbb4592ba8---lozudimutejofadavidusu.pdfIn PDF document text
    • https://arichaindia.com/userfiles/file/bejolosavakizizazareko.pdfIn PDF document text
    • http://valifyrepapillon.com/clients/6/68/68e1c6a84db99a04c21676ff826d6e37/File/mevemoxu.pdfIn PDF document text
    • https://kayakbranson.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e09093d4327---91841887947.pdfIn PDF document text
    • https://www.rath-catering.de/wp-content/plugins/formcraft/file-upload/server/content/files/160988af796511---dizimanida.pdfIn PDF document text
    • http://pelesiuvalymas.lt/i/File/3617051515.pdfIn PDF document text
    • https://www.surajinformatics.com/wp-content/plugins/super-forms/uploads/php/files/2df3ee8b22e644fde79fc08e87cb201c/vafijuxubup.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=pokemon+sun+and+moon+gba+zip+file+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_off0000eba7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBA7 17856 bytes
SHA-256: b44252389ec6e77288f4dbe36b856ae0b8163f681db6e8a78f09c04707656722
font_01_sfnt_off00011a80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A80 11220 bytes
SHA-256: 6cb5a8163726d22f35e3c194873b3c5505fa35f712feeb9ea211f81b0c78545d
font_02_sfnt_off0001346e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1346E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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