Malicious PDF — malware analysis report

Static analysis result for SHA-256 e02c0972f8a7b0eb…

MALICIOUS

PDF

110.1 KB Created: 2021-09-01 20:00:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: b0089ed91ec358efac345a0c105569e6 SHA-1: 8208245c2d269ff885cda7bf2e89eb22746a1a55 SHA-256: e02c0972f8a7b0eb3d300b08533be8e94ab55be406d53255e60f0d67f0b5a78f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier as malicious. It contains numerous links, many pointing to compromised CMS upload directories or disposable hosting, indicating a link farm designed to redirect users. The presence of these links suggests an attempt to distribute malicious content or conduct phishing operations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

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://sinhadventure.com/uploads/file/52801855157.pdf In PDF document text
    • https://calprin.com/ckfinder/userfiles/files/7251069557.pdfIn PDF document text
    • http://serendipityorlando.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080d9a6324b4---zobitopipivovitidixif.pdfIn PDF document text
    • http://buyyoutubesubscribers.com/ci/userfiles/files/73879207805.pdfIn PDF document text
    • http://www.agrosystem.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1610d5ffdea226---xusowowumoromotoxin.pdfIn PDF document text
    • https://www.financedeclined.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160773a65dc0dc---pijimafitokabubaj.pdfIn PDF document text
    • https://vcubusinesssolutions.com/userfiles/file/gesepusumuvaf.pdfIn PDF document text
    • https://www.enviedecrire.com/wp-content/plugins/formcraft/file-upload/server/content/files/160783f26ac73a---vovumenomi.pdfIn PDF document text
    • http://zsmnowakowski.pl/userfiles/file/beguzuxivozovitefifo.pdfIn PDF document text
    • http://americasbestmanassas.com/uploads/files/roveleraxamugubafada.pdfIn PDF document text
    • http://dralituncer.net/userfiles/file/nalenatadoli.pdfIn PDF document text
    • http://sintellect.ru/Repository/file/17244622746.pdfIn PDF document text
    • http://jngf.cn/files/file/kurapabavud.pdfIn PDF document text
    • http://infrabud.eu/fckpliki/file/70507214940.pdfIn PDF document text
    • http://fitviewer.biz/files/file/18082541968.pdfIn PDF document text
    • http://elonsummerstorage.com/wp-content/plugins/formcraft/file-upload/server/content/files/160706bd54b78f---647409343.pdfIn PDF document text
    • https://slavica.ru/wp-content/plugins/super-forms/uploads/php/files/707f484152de2c9810a1b5be3f634299/revozu.pdfIn PDF document text
    • http://gocep.org/data/userfiles/files/mirogewotazokojirutojefi.pdfIn PDF document text
    • http://dirabrealtors.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b9b7f861331---71673414519.pdfIn PDF document text
    • http://hotelpenza58.ru/ckfinder/userfiles/files/46093403545.pdfIn PDF document text
    • http://xn--80akij1ajew.xn--p1ai/wp-content/plugins/formcraft/file-upload/server/content/files/16093bce5ceb5d---putimubal.pdfIn PDF document text
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/ls8u1cvr74pgh5uhn7b81p73s3/kurovove.pdfIn PDF document text
    • http://bigredclassof1960.com/clients/879476/File/kadikutafobi.pdfIn PDF document text
    • https://lesura.net/userfiles/file/pewetemij.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=guarantor+rent+meaningPDF 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_off00014958.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14958 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001616a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1616A 18636 bytes
SHA-256: c92996671f8e3dcbb4afcb93af7fdf49fa0a33573866dfc466d11792f1b48527
font_02_sfnt_off0001921d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1921D 10376 bytes
SHA-256: 79855eaac4e47848028819296e612e7c5077b634d0101b7ff84a80d5588d4a11

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