Malicious PDF — malware analysis report

Static analysis result for SHA-256 036eb5310d130789…

MALICIOUS

PDF

80.8 KB Created: 2021-09-19 02:46:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 81e7581500325d8544c3a3ea70cbc45b SHA-1: 83bd475d441f01fd4131894766dd97ad62951ccd SHA-256: 036eb5310d130789da70d42cbbefb9273a001cd7fdca148ce7024d24b8bcd9f8
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs pointing to various domains, suggesting a link farm or redirection mechanism to distribute malicious content. The PDF structure and embedded URLs are consistent with phishing or malware delivery tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://infrive.ru/uplcv?utm_term=android+supported+audio+formats PDF link annotation
    • https://misbahelmudii.org/ckfinder/userfiles/files/77136425539.pdfIn PDF document text
    • http://bukharaatlanta.com/sites/default/files/file/21557910084.pdfIn PDF document text
    • http://kramnyca.info/img/upload/editor/file/finigutimu.pdfIn PDF document text
    • https://mut-zur-veraenderung-hambuch.de/userfiles/file/vusibike.pdfIn PDF document text
    • https://www.abandassociates.com/ckfinder/userfiles/files/64519704875.pdfIn PDF document text
    • http://ohmamakitchen.com/uploads/files/riroruxuxupagenopofu.pdfIn PDF document text
    • http://liebherr-tr.com/userfiles/file/xideb.pdfIn PDF document text
    • https://totounited.com/contents/files/46144345474.pdfIn PDF document text
    • http://cleversystems.ru/userfiles/file/zusavosetajenudimowu.pdfIn PDF document text
    • http://dienlanhlongan.com/upload/files/gigebugibonosop.pdfIn PDF document text
    • http://www.hj-bouwt.be/wp-content/plugins/formcraft/file-upload/server/content/files/1613ffbb0aa639---vizozarizan.pdfIn PDF document text
    • http://syntrend.critical.tw/upload/files/54580439068.pdfIn PDF document text
    • http://bacsionline.net/userfiles/file/garodukokawevinu.pdfIn PDF document text
    • https://ijtm.in/userfiles/file/23481248518.pdfIn PDF document text
    • http://bearings-home.com/userfiles/file/xusemesexe.pdfIn PDF document text
    • http://adamlegal.com/userfiles/file/tolabewu.pdfIn PDF document text
    • https://generalaudit.pl/eurostyl/photos/file/97835728804.pdfIn PDF document text
    • http://thuaphatlailongthanh.vn/upload/contentFile/minhchau/file/64385986598.pdfIn PDF document text
    • http://stickerbarcode.com/file_media/file_image/file/liremewosadedeb.pdfIn PDF document text
    • https://socardan.com/userfiles/files/wujogevonopuwoxewowig.pdfIn PDF document text
    • http://czechdidgeridoo.com/admin/upload/file/86741264222.pdfIn PDF document text
    • http://akgwealthplanner.com/crm/files/8380949923.pdfIn PDF document text
    • https://mmgrowersg.com/ckfinder/userfiles/files/60302234592.pdfIn PDF document text
    • http://wasserentkalkung.at/ckfinder/userfiles/files/gelelusalukutabidefano.pdfIn PDF document text
    • http://dc-3ed4d7413bdb.prshots.de/uploads/userfiles/1630749801/files/88678918293.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_off0000d654.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD654 17932 bytes
SHA-256: 90ade7f0099bd269d480e49687c3700d5e08792ec1b490e15e314080081c58bc
font_01_sfnt_off000104cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104CD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011ce4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CE4 10696 bytes
SHA-256: 364d10bc2966bc27783aea1d32393686098081a74beff42a7290d03827892c7f

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