Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ebd0fd005ffabdb…

MALICIOUS

PDF

91.0 KB Created: 2021-09-18 09:51:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: bfc00ca3e458ba29daa7e6deea7d4250 SHA-1: ec05159f9a61db1fec7b6423bcd6af2586456cf5 SHA-256: 5ebd0fd005ffabdb6b250016e1eb19700e8f2479dedb4bd0e77a95cec12bf723
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple heuristics indicating malicious intent, including links to compromised CMS uploads and disposable hosting, and a high ML classifier score. The presence of a visual download button lure suggests an attempt to trick the user into executing a payload. The ClamAV detection as 'Pdf.Phishing.Trojan' further confirms its malicious nature, likely involving the download of a second-stage payload from one of the embedded URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

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://allytemp.ru/uplcv?utm_term=fast+and+furious+9+movie+online PDF link annotation
    • http://odontotecnicacoop.it/userfiles/file/pifupajegidiporufuno.pdfIn PDF document text
    • https://srinivasagroup.com/ci/userfiles/files/vijazegibozegenamazepel.pdfIn PDF document text
    • http://steakclubhn.com/campannas/file/dijox.pdfIn PDF document text
    • https://edubox.mn/uploads/users/0/files/rabazikurinodexudipabadun.pdfIn PDF document text
    • https://camping-du-lac-dijon.com/userfiles/fichiers/66294539379.pdfIn PDF document text
    • http://skrabl.pl/www/rpbd/fck/file/kilojelinovixebuwo.pdfIn PDF document text
    • http://erex.hu/upload/file/63318794043.pdfIn PDF document text
    • http://www.carolglassman.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612edff295025---sisojopikedoj.pdfIn PDF document text
    • http://markone-tools.com/upload/files/7398076631.pdfIn PDF document text
    • https://nevjegyzek.eu/uploads/file/65814330023.pdfIn PDF document text
    • http://tfh-filter.hu/_user/file/ruwefetasiposama.pdfIn PDF document text
    • http://xn--elementy-zczne-kwb98g.pl/media/file/91043900217.pdfIn PDF document text
    • https://djhelaly.com/wp-content/plugins/super-forms/uploads/php/files/b54cdaa7b821ec37f6d0b33f3cf9db53/79054266708.pdfIn PDF document text
    • http://cheapneasytrafficschool.com/CheapNEasyTrafficSchool/pa/trainstation/uploads/image/file/74391747151.pdfIn PDF document text
    • https://glosunspa.com/wp-content/plugins/formcraft/file-upload/server/content/files/161343cd163d85---korotalugukuwiremukomoz.pdfIn PDF document text
    • http://rqconsultores.com/userfiles/file/fozogibelisezowufe.pdfIn PDF document text
    • http://healthywithhart.com/res/file/62789892980.pdfIn PDF document text
    • https://hanedantoptan.com/upload/files/zibanosanuduv.pdfIn PDF document text
    • http://eske.hu/wp-content/plugins/formcraft/file-upload/server/content/files/161341077a342a---19378668239.pdfIn PDF document text
    • https://biographiewerkstatt-singer.de/userfiles/file/jiniweboguga.pdfIn PDF document text
    • https://www.adler-leitishofen.de/wp-content/plugins/formcraft/file-upload/server/content/files/16133ea1bc0f4f---26420517955.pdfIn PDF document text
    • http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/2d21f13c549c3ccd597850525f410beb/56890395974.pdfIn PDF document text
    • https://paroles-vives.com/ckfinder/userfiles/files/pulibuketu.pdfIn PDF document text
    • http://levakov132.ru/userfiles/file/kowipanenifagadibenezukit.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_off0000fb67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB67 10828 bytes
SHA-256: c263d22f25d939f082efdf49505f4f75dbbf2b15b562808523dd712739f64480
font_01_sfnt_off00011468.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11468 18928 bytes
SHA-256: 9646ad8bab0153a3e46c497a99ce016f8d5f9050fa2e1176cbe1446dc1598b7c
font_02_sfnt_off00014612.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14612 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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