Malicious PDF — malware analysis report

Static analysis result for SHA-256 d217ce2ed8c3c61d…

MALICIOUS

PDF

68.8 KB Created: 2021-09-24 20:44:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 7010053b617691a8a772a274b5cc0970 SHA-1: 967513674d8e4daed4fd7c0e9623a3207d58dfd5 SHA-256: d217ce2ed8c3c61d78333db37e3d88d46d04d5df9455d37c78a6dda246216c80
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external URIs and is flagged by ML classifiers and ClamAV as malicious, indicating a phishing or malware distribution attempt. The presence of multiple distinct hosts and UTM parameters suggests a link farm designed to redirect users to potentially malicious content. While no scripts were explicitly extracted, the PDF structure and heuristic firings strongly suggest it's designed to exploit vulnerabilities or redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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://crewmak.ru/uplcv?utm_term=best+sharing+app+android PDF link annotation
    • http://emke.hu/uploads/ckfinder/userfiles/files/7910405057.pdfIn PDF document text
    • https://thefertilizergranulators.com/d/files/vevukemoziroruwanak.pdfIn PDF document text
    • http://reguitti-engineering.it/userfiles/files/jesujufuso.pdfIn PDF document text
    • https://xn-----6kcabagcgfjsxjciriy6alkh6a7aqk.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/a0928af5ed6e89f78b50fc7f30462e26/30683564178.pdfIn PDF document text
    • https://rent-1.es/ckfinder/userfiles/files/novetafi.pdfIn PDF document text
    • http://jiin-torng.com/uploadfiles/20210918035750.pdfIn PDF document text
    • http://ace-pharm.com/upload/files/sodimi.pdfIn PDF document text
    • http://gtshotel.it/images/file/42298926341.pdfIn PDF document text
    • http://darangyi.com/userData/board/file/42266922902.pdfIn PDF document text
    • http://sovaimm.it/userfiles/files/87690951492.pdfIn PDF document text
    • https://pharma-tools.eu/galeria/file/15722185631.pdfIn PDF document text
    • http://mcserpenti.com/userfiles/file/lixadaxoxananabunop.pdfIn PDF document text
    • http://audiomaster.se/wp-content/plugins/formcraft/file-upload/server/content/files/16131f7c2b90f6---sotusevuzudibeti.pdfIn PDF document text
    • http://savemaxint.com/files/file/79600299344.pdfIn PDF document text
    • http://eternoohydro.com/d/files/32657839179.pdfIn PDF document text
    • https://x-leather.com/radsportfiles/file/dagapufakejowenegonexobi.pdfIn PDF document text
    • http://vyveva.eu/UserFiles/File/fizagunagofirolulawakibi.pdfIn PDF document text
    • https://sammycar.ch/sammy/sites/default/sammyfiles/newsletterfile/sajopuvukine.pdfIn PDF document text
    • http://knx-shop.ru/admin/ckfinder/userfiles/files/lajijebenox.pdfIn PDF document text
    • https://makanbanyak.net/contents/files/duvevozukujamedamo.pdfIn PDF document text
    • http://geredekombiservisi.com/userfiles/file/39384036080.pdfIn PDF document text
    • http://myconnect-thailand.com/image/upload/File/gobewuru.pdfIn PDF document text
    • 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_off0000afdc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAFDC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c7f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7F3 10676 bytes
SHA-256: 828f8e1c3f93c646fb1a57f35067ae7c3da58a1d1b5e0be0b46d8167c7f8fd68
font_02_sfnt_off0000e02e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE02E 15164 bytes
SHA-256: 63694ada77b98e8697f93a564aa562392fb423b4fc13c3f49d750cd7cdde7b04

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