Malicious PDF — malware analysis report

Static analysis result for SHA-256 63dae16476d235ad…

MALICIOUS

PDF

78.7 KB Created: 2021-09-17 07:18:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: f6002e20b1755b719f6cf24e503b0ab2 SHA-1: a447641d0ebf80176e9868fc8520d4d2d7a80c02 SHA-256: 63dae16476d235ad861c2919ee68484474d428b29189b1310d50738a564ea9a2
126 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs, many pointing to disposable domains, and is flagged as a link farm. This suggests the document's primary purpose is to redirect users to potentially harmful websites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://imagebeaute.fr/userfiles/file/timafozixixezesatiw.pdf In PDF document text
    • https://ceramicasvillaflor.cl/UserFiles/File/8041761675.pdfIn PDF document text
    • https://xn--80apefbdm9ah5g.xn--p1ai/userfiles/fubimenirazowibapufaxupof.pdfIn PDF document text
    • http://dxline.eu/userfiles/file/kukazimoranokid.pdfIn PDF document text
    • http://xn--80aaaghhaztbcd1agjgbccsgfftf.xn--p1ai/pict/file/19258156385.pdfIn PDF document text
    • https://siyata.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/1613c45818b8de---xufanesavivagifomunu.pdfIn PDF document text
    • http://manpukuorder.com/uploads/files/kijolokaxofotewupamutezi.pdfIn PDF document text
    • http://gibisch.com/files/files/90800566314.pdfIn PDF document text
    • http://thuaphatlailongthanh.vn/upload/contentFile/minhchau/file/vubosakemelerogumikipamo.pdfIn PDF document text
    • https://tomorrowhubs.com/upload/users/files/pivigijugiru.pdfIn PDF document text
    • https://aksusu.com/upload/files/tesujumedete.pdfIn PDF document text
    • http://wimborst-ceramics.nl/public/view/upload/fckeditor_images/file/76732087889.pdfIn PDF document text
    • https://ihappywash.com/uploads/files/202109041043301059.pdfIn PDF document text
    • http://braintradingbcn.com/wp-content/plugins/super-forms/uploads/php/files/a9951ca217d80891e469e00f054fa46f/mowagekinarefapowi.pdfIn PDF document text
    • http://edallyshop.com/upload/files/jetitiw.pdfIn PDF document text
    • http://www.satit.nrru.ac.th/satit/_Adminis/ckfinder/userfiles/files/bafaja.pdfIn PDF document text
    • http://ecoaga.com/documentos/file/56298114259.pdfIn PDF document text
    • http://paulabenveniste.com/UserFiles/file/pixilopapikebunomit.pdfIn PDF document text
    • http://ediljolli.com/userfiles/files/15669691538.pdfIn PDF document text
    • http://www.emporiocaritaspisa.it/wordpress/wp-content/plugins/formcraft/file-upload/server/content/files/1614062a1cbbb8---89450501717.pdfIn PDF document text
    • http://autoscuolauniversale.it/userfiles/files/zudifufijedubibefifamu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=cricket+wicket+lengthPDF 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_off0000d12f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD12F 10268 bytes
SHA-256: 545236d2868749e13da5780cab725eba23257dc986b024139e2ac299c040683d
font_01_sfnt_off0000e83f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE83F 17464 bytes
SHA-256: b8ee022c9398e6e3dd7dd9c7fba5a413cb367c304759dcfe6a85b9210f8889dc
font_02_sfnt_off00011575.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11575 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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