Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2af26cd3ca0b984…

MALICIOUS

PDF

82.0 KB Created: 2021-07-15 21:27:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 62aa7980267a983e06dcdb4a8fadfabb SHA-1: d3aef132dcdac44f968bfff6b6ad7244caf79780 SHA-256: e2af26cd3ca0b98418da8ce054f01428950ff0f0206e108a98676bae79cc45cb
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to multiple compromised websites and disposable hosting domains, likely for phishing or malware distribution. The embedded URLs, such as 'https://laborke.ru/uplcv?utm_term=48+laws+of+power+rules', are indicative of this malicious redirection strategy.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 https://laborke.ru/uplcv?utm_term=48+laws+of+power+rules PDF link annotation
    • http://ziepniekkalns.lv/wp-content/plugins/formcraft/file-upload/server/content/files/1607193bc1b80b---35237858500.pdfIn PDF document text
    • https://jjmassociates.com/wp-content/plugins/super-forms/uploads/php/files/41c2060012db877f42918d7517930e7c/40994384771.pdfIn PDF document text
    • http://agiusfuneraldirectors.com/files/file/77975740299.pdfIn PDF document text
    • https://yarsan.ru/wp-content/plugins/super-forms/uploads/php/files/58b19603a6e24bc16a9b9ea90002ca58/jiwiliwuwidijipirenimomab.pdfIn PDF document text
    • https://bf-pomosch.ru/wp-content/plugins/super-forms/uploads/php/files/ddtfp5gac6d8qtvqkm1gb4r175/21960230657.pdfIn PDF document text
    • https://gulertrafik.com/wp-content/plugins/super-forms/uploads/php/files/062mon3t0m3nmckcnapvl5naj0/53875921541.pdfIn PDF document text
    • https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/573497110f5480fff537b69b3d5658fe/67617634510.pdfIn PDF document text
    • https://www.lesson-online.org/wp-content/plugins/super-forms/uploads/php/files/rq78tlp89bfl9or1jus8trt8i2/32074362952.pdfIn PDF document text
    • http://gistys.com/userfiles/file/posavedubapikigonor.pdfIn PDF document text
    • https://www.kiteschule-eckernfoerde.de/wp-content/plugins/formcraft/file-upload/server/content/files/16076cb9021cc0---tejawegejalonolo.pdfIn PDF document text
    • https://artlabjo.com/userfiles/file/53987223196.pdfIn PDF document text
    • http://www.elsecretodelolivo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160edc7b5d2264---37759953961.pdfIn PDF document text
    • https://dimensioninteractive.com/WYSIWYGImage/file/bapobezadezubi.pdfIn PDF document text
    • http://babamoleskine.com/files/file/bimulekepuxuwewumademu.pdfIn PDF document text
    • https://xenang-mitsubishi.com/fckupload/file/sakon.pdfIn PDF document text
    • https://www.reparaciondebomba.com.ar/wp-content/plugins/super-forms/uploads/php/files/s03btmig7i966l4thtqjb3gkn2/kagefuwaku.pdfIn PDF document text
    • https://edukiya.com/wp-content/plugins/super-forms/uploads/php/files/ddc3fba9488f5dfddcaaf0d216008267/8638329299.pdfIn PDF document text
    • https://wurstfargo.com/wp-content/plugins/super-forms/uploads/php/files/5ec754dd910d4e469af81a4d975dad2e/52805109978.pdfIn PDF document text
    • http://caratow.eu/userfiles/file/88651705370.pdfIn PDF document text
    • https://inchiriereelicoptere.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1608f7fe0c0923---begilir.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_off0000e162.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE162 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f979.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF979 10432 bytes
SHA-256: 630db9ef00b7d80e47bd02426d4b8b766967b12fd26a58c0247d7ce76eeb43c3
font_02_sfnt_off00011164.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11164 16236 bytes
SHA-256: c12ad4fd75dd9ab9ccc28f4b7ba367c5768c6e0c5e1912ca22d4207c7e7307be

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