Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0f9d45bfc0b8d01…

MALICIOUS

PDF

92.5 KB Created: 2021-09-09 03:35:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 75481ff584eba7346b80bb381522f22f SHA-1: 51f20e071e1e0d439234bfb742ba72d9ab613122 SHA-256: e0f9d45bfc0b8d0160668b58e948af5a8994d9ba263069708b8982a458f036cc
156 Risk Score

Malware Insights

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

The PDF contains a large number of embedded URLs, many of which point to compromised CMS upload directories, suggesting a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly indicate malicious intent. No scripts were extracted, but the structure and URL distribution are indicative of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9726

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://scout-educationguide.com/userfiles/file/jasifozusetixovugar.pdf In PDF document text
    • https://antoinepanau.com/wp-content/plugins/super-forms/uploads/php/files/09a160dc581fd118073c0194d312df09/nonomibinokizarural.pdfIn PDF document text
    • http://nontaromclinic.com/ckfinder/userfiles/files/27377905870.pdfIn PDF document text
    • https://www.abandassociates.com/ckfinder/userfiles/files/66745980798.pdfIn PDF document text
    • https://excellencetogether.com/img/files/file/18219556202.pdfIn PDF document text
    • http://busankid.com/webfiles/board/file///97632807614.pdfIn PDF document text
    • http://creatinglifeoptions.com/userfiles/files/rogizetunifokizipijokisa.pdfIn PDF document text
    • https://mimpiindah168.com/contents/files/42335557226.pdfIn PDF document text
    • http://euredit-editions.com/userfiles/file/faxoza.pdfIn PDF document text
    • http://myphamvickwhitebeck.vn/luutru/files/64700035535.pdfIn PDF document text
    • http://yeosingol.com/FileData/ckfinder/files/20210908_5B1D1FF6F29E026C.pdfIn PDF document text
    • http://urgentcarepb.net/userfiles/file/bonoguwexegowadulifanoba.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/161310724f3021---30751057512.pdfIn PDF document text
    • https://rsvforum.com/userfiles/file/59524086149.pdfIn PDF document text
    • https://granitnet.hu/editor_up/jafotorarefapodelom.pdfIn PDF document text
    • https://bhopalliteraturefestival.com/mpsdp/uploads/files/28560906147.pdfIn PDF document text
    • http://www.bash.cl/media/file/demovokipexofowifuja.pdfIn PDF document text
    • https://advance-pack.com/editor_upload/file/repufedoga.pdfIn PDF document text
    • http://swissies.lt/ckfinder/userfiles/files/rodigisozapowi.pdfIn PDF document text
    • http://juditphotography.com/picture/userfiles/file/32305699400.pdfIn PDF document text
    • https://arab-hams.com/Ups/files/xoturovix.pdfIn PDF document text
    • http://rayanchem.com/d/files/67824346048.pdfIn PDF document text
    • http://mas.vacations/wp-content/plugins/formcraft/file-upload/server/content/files/16135b1198f4d4---9408774113.pdfIn PDF document text
    • https://staffxrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/38c5d968be03309e165c3c7935bbf8a6/64701952917.pdfIn PDF document text
    • http://asupuro.com/user_data/image/file/79808402767.pdfIn PDF document text
    • http://stkvn.ru/wp-content/plugins/super-forms/uploads/php/files/529bf5f33a0b017430eb7fa1bd989df7/dageninulupifuvise.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=fun+game+for+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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC62 10464 bytes
SHA-256: 85bc1e111359d246493cf024b213fe8280d25be00addc5b1c23585e93b2b0ebb
font_01_sfnt_off000103ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103CE 17596 bytes
SHA-256: d7874bb3a76441231376f8d3830044d4f14cada599820d7c0f6f00da258f062d
font_02_sfnt_off00011e43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E43 17632 bytes
SHA-256: 954972579de25d1121b16f005b61897354e7203f87d7324747ef4e413a6eaec6
font_03_sfnt_off00014bca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14BCA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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