Malicious PDF — malware analysis report

Static analysis result for SHA-256 2094fa2ece294daa…

MALICIOUS

PDF

68.1 KB Created: 2021-09-20 16:04:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 2fb6a3ce50c5d019ef27b29e09aefb63 SHA-1: 18ae913da9afa0ccf4f518de7405448991815900 SHA-256: 2094fa2ece294daa54daaab27a3f877ff836cbc77252d5009da13807ba41c28a
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file exhibits characteristics of a malicious document, including the presence of numerous links pointing to potentially compromised websites and disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent. The primary attack pattern involves directing users to external resources, likely for further exploitation or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

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 to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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 http://flyingfish-stay.com/userfiles/file/2433436392.pdf In PDF document text
    • http://www.tenniscanberra.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1613753576e795---rikizekaxinenamosenewutoj.pdfIn PDF document text
    • http://ijdssymposium.eu/upload/jebos.pdfIn PDF document text
    • http://chicagohalo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136819b06071---56349416547.pdfIn PDF document text
    • http://panyuchen.com/ckfinder/userfiles/site_eachfun_com/files/mesupabagelewekijopex.pdfIn PDF document text
    • http://abwjefferson.com/uploads/files/tixafuzax.pdfIn PDF document text
    • https://mancomunidadvaldizarbe.com/userfiles/files/lilolejufuf.pdfIn PDF document text
    • http://lagrupacio.cat/file/daremubugojebuzexek.pdfIn PDF document text
    • https://rowadalbyt.com/userfiles/files/11611872039.pdfIn PDF document text
    • http://adoriantarla.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16131cd674bf23---99415793766.pdfIn PDF document text
    • http://modern-pro.ru/files/file/pimome.pdfIn PDF document text
    • https://vienhung.com/webroot/img/files/pilarovin.pdfIn PDF document text
    • https://www.brunosistemi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613198037eb77---gugetegolafukojinasib.pdfIn PDF document text
    • http://sicilyontable.it/userfiles/files/danewu.pdfIn PDF document text
    • https://digitaldaya.com/imagenes/file/2563403297.pdfIn PDF document text
    • http://kondicionery-domodedovo.ru/upload_picture/file/bunirerow.pdfIn PDF document text
    • http://bwc.lt/i/zavin.pdfIn PDF document text
    • http://autosoftware.company/autoresponders_images/files/90864723787.pdfIn PDF document text
    • https://genegurumiraclehealer.com/userfiles/file/26115555043.pdfIn PDF document text
    • https://bompentax.com/quangbasanpham/app/webroot/upload/image/files/22056935239.pdfIn PDF document text
    • https://www.projectorrentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/161411cf66d6fa---mujizorexu.pdfIn PDF document text
    • https://childrencareandliteracysociety.org/userfiles/files/84262137943.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=my+summer+car+android+downloadPDF 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_off0000ae18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAE18 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c62f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC62F 10724 bytes
SHA-256: a15fe7830e7635aac24db511d7424ea0015a354ee844db4b92ed2169e910ec86
font_02_sfnt_off0000ded3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDED3 14424 bytes
SHA-256: 34552be788109eef3b77c6a7640e10eab7c0eedc99c100a94498235a0f97f450

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