Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0b96dddd11ffe66…

MALICIOUS

PDF

93.9 KB Created: 2021-07-08 20:05:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 8090d0969f0edcffdba9df2690b41b75 SHA-1: 2037647e4d7ef47d0afb952806b297faabc4bb50 SHA-256: d0b96dddd11ffe66b265eabb361296c36b0baaf21e17500c8e253f0b6e3fe110
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised WordPress sites and acting as a link farm. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution through these links. No scripts were extracted, but the structure and URL analysis suggest a malicious document designed to lure users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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://www.accidentinjurylascruces.com/wp-content/plugins/super-forms/uploads/php/files/16em97g2lcaj9ncqjm7q4n48ov/jilawererowafifobofijozek.pdf In PDF document text
    • https://cananalimdar.com/wp-content/plugins/super-forms/uploads/php/files/9mfh81mtvvr0m5f2auf19k3j4a/wovap.pdfIn PDF document text
    • http://supair-lux.hu/ckfinder/userfiles/files/fezadapigedamemorosabelu.pdfIn PDF document text
    • https://www.landalastadservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081dacac8579---tafexiwafokidaweladep.pdfIn PDF document text
    • https://malabarmail.com/ckfinder/userfiles/files/80310233499.pdfIn PDF document text
    • https://www.mds-horizons.com/upload/files/kovep.pdfIn PDF document text
    • http://global-insurance-broker.de/downloads/39201828595.pdfIn PDF document text
    • https://eminencesolutions.in/resources/userfiles/file/6197938975.pdfIn PDF document text
    • https://ateneoarbonaida.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607de5a908b0a---69107626830.pdfIn PDF document text
    • http://www.vitrierbxl.be/wp-content/plugins/formcraft/file-upload/server/content/files/16070bed2d759b---tinijovizanopen.pdfIn PDF document text
    • https://www.dynasil.com/wp-content/plugins/super-forms/uploads/php/files/f6b57963fe3041a5583f7e29626abf9a/bewezomebuw.pdfIn PDF document text
    • http://suachuadienlanhhoaphat.com/hinhanh_fckeditor/file/riwananujo.pdfIn PDF document text
    • https://heykidsletscook.info/wp-content/plugins/super-forms/uploads/php/files/5e5787979012b8c00a0074e85cb6b5f6/67687588837.pdfIn PDF document text
    • https://lymfologi.se/anvandarbilder/221/files/50863453059.pdfIn PDF document text
    • https://elitestrategyglobal.com/wp-content/plugins/super-forms/uploads/php/files/641c793e9a3a74bd7834ba420d8d24ee/5548996730.pdfIn PDF document text
    • http://franzoesischebulldoggen.eu/userfiles/file/sifobuvijilawokotetotak.pdfIn PDF document text
    • http://mvclassof1990.com/clients/8/8c/8ca0ba2c7a07c5cd1f21f9fc323c16c5/File/vuxub.pdfIn PDF document text
    • http://aite-materials.com/upfiles/file/popazegefuwaxi.pdfIn PDF document text
    • http://zoncmswebsitebeheer.nl/files/editor/file/60655512460.pdfIn PDF document text
    • https://www.lang-mayer.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608fd4aedcf3c---52600817369.pdfIn PDF document text
    • http://amwordpress.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607755649cc44---zebofamilebage.pdfIn PDF document text
    • http://zamokugrofa.sk/admin/fckeditor/file/417830644.pdfIn PDF document text
    • https://purebodycare.courses/wp-content/plugins/super-forms/uploads/php/files/figmm4eh9m8no6go8tulefe5e0/vozelabuwipowezoxa.pdfIn PDF document text
    • https://nscs.org/wp-content/plugins/super-forms/uploads/php/files/02ad9d526f1ba8821e49bf1ac4f52431/debavutozopa.pdfIn PDF document text
    • http://svsteinfurth.de/radsportfiles/file/labemeluneroketiraki.pdfIn PDF document text
    • http://leap-egypt.com/wp-content/plugins/formcraft/file-upload/server/content/files/160803d9200a95---jetelunune.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=internal+strengths+examplesPDF 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_off000109d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109D3 10540 bytes
SHA-256: 714d14e7086b4d928f29f5b661bd3bd56930d24f45f389002201fdeae2abec60
font_01_sfnt_off000121ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121AD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000139bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x139BF 17780 bytes
SHA-256: 16e99a44b303be5f1b2174ac0fcfc629ffc20ddefe993aa486badd8040781020

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