Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ecdcf8a7bad620c…

MALICIOUS

PDF

85.6 KB Created: 2021-09-10 00:56:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: cc15911dc115769ebe23b41ec5a6bc25 SHA-1: 8e625ea8d0cd3d152b542a71e1a6857ce9dfa461 SHA-256: 4ecdcf8a7bad620c96f97f473ad29f0a6bd485c31c46eb9c625dabc451dbc453
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://zimmerei-possert.at/bugojuvo.pdf In PDF document text
    • http://mondoacquapiscine.com/userfiles/files/budusasefafeguro.pdfIn PDF document text
    • http://reklamaopole.pl/userfiles/file/xesibemanopiwaxurotovotov.pdfIn PDF document text
    • http://www.cottagegrad.ru/files/file/13397675549.pdfIn PDF document text
    • https://www.uniqueartzz.com/wp-content/plugins/super-forms/uploads/php/files/tubrtvcd8pq8qh6alnin6acsrq/febarajori.pdfIn PDF document text
    • https://franchisefarm.franchiseharbor.com/files/files/35612762385.pdfIn PDF document text
    • https://holycrosshealthcare.com/userfiles/files/2662491885.pdfIn PDF document text
    • https://suadienlanhhanoi.net/upload/files/ramulogogivoxiresupuwuw.pdfIn PDF document text
    • http://grandviewgroupresort.com/upload/files/lazux.pdfIn PDF document text
    • https://mobile-translator.eu/app/webroot/media/files/72896026571.pdfIn PDF document text
    • http://mgmkt.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16132e743e7380---jokovokosomanegasidero.pdfIn PDF document text
    • http://hoteldarim.ir/basefile/hoteldarimir/files/38342905713.pdfIn PDF document text
    • http://rockefellersgold.hu/editor_up/libibezavapetonizabitav.pdfIn PDF document text
    • http://lenosada.sk/editor_uploads/files/67505755175.pdfIn PDF document text
    • http://handinks.com/ckfinder/images_store/files/32829037005.pdfIn PDF document text
    • http://karpatskiles.ru/store/file/26513029305.pdfIn PDF document text
    • http://encino.ilovepokebar.com/uploads/files/rokivikotetarudili.pdfIn PDF document text
    • http://xn--80aiddhbkcq5bcaz.xn--p1ai/upload/files/ragavotudu.pdfIn PDF document text
    • https://novinfasteners.com/userfiles/file/63498725221.pdfIn PDF document text
    • https://bankubezpieczen.pl/userfiles/file/fekiredatomegoj.pdfIn PDF document text
    • https://izometal.net/mm/file/jutupu.pdfIn PDF document text
    • http://thuocnam.xyz/images/files/56756033915.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=super+mario+bros+3+rom+cheatsPDF 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_off0000e8d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8D0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000100e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100E7 10976 bytes
SHA-256: 948af610170b17b0d1d06491338d9c7b45362b20500d0bed59797b66a27ee2fb
font_02_sfnt_off00011a29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A29 18004 bytes
SHA-256: 15f0d0c6b8826bccb7f9554b81dd7a1ba1f04bb79633f2dcf21d72c832c1ce53

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