Malicious PDF — malware analysis report

Static analysis result for SHA-256 95a0fe9875d8bbbc…

MALICIOUS

PDF

88.2 KB Created: 2021-09-07 19:45:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 898cffa7d831cf0262eda01a6829d3ee SHA-1: 7b09e3ac277ca27760dced201dff1faa66a3c56c SHA-256: 95a0fe9875d8bbbc5a3ac2d4fffb8bcc6a051efed20c1538ba29bf1913e35932
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to multiple compromised or disposable hosting sites, likely for phishing or malware distribution. The presence of embedded URLs and the nature of the heuristics suggest it is designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://medvor.ru/uplcv?utm_term=non+stationary+time+series+pdf PDF link annotation
    • http://health-bridge.in/upload/file/68853295042.pdfIn PDF document text
    • http://farmaciafici.com/userfiles/files/sajafapevaxu.pdfIn PDF document text
    • https://laxmigrouppune.com/wp-content/plugins/super-forms/uploads/php/files/033c7177f9bf03f4e69fbe9aaab65308/nopimifo.pdfIn PDF document text
    • http://tangiahoang.com/skinkorea/Images_upload/files/sijunejujaboluxulezu.pdfIn PDF document text
    • http://agroanaliz.by/upload/editor/files/61219816556.pdfIn PDF document text
    • http://www.alwaysflorida.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609dca8eb74fb---sudekazugupokenelodov.pdfIn PDF document text
    • https://www.andeanskyline.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c3bd1b3f31---xixafesaxowad.pdfIn PDF document text
    • http://accomplishtheimpossible.com/userfiles_ati/file/47913480661.pdfIn PDF document text
    • http://winecellarkeeper.com/ckfinder/userfiles/files/finijujujubev.pdfIn PDF document text
    • https://www.hinogas.com/wp-content/plugins/super-forms/uploads/php/files/60tu6aqjqikmet0628qlcufl7r/goxavokileb.pdfIn PDF document text
    • https://www.sussexweddingservices.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1608dce0142767---71030725344.pdfIn PDF document text
    • http://kazenergy.kz/wp-content/plugins/formcraft/file-upload/server/content/files/1607ccda1b4b0e---tikijuxakibevobow.pdfIn PDF document text
    • https://www.sacproblemleri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160799afac46e4---25532183476.pdfIn PDF document text
    • http://larben.cz/media/images/upload/file/mopabafuvowa.pdfIn PDF document text
    • http://deauville.ru/files/file/tudapatusak.pdfIn PDF document text
    • http://www.fd.ntou.edu.tw/ckfinder/userfiles/files/girufanazuxujar.pdfIn PDF document text
    • https://genesisbehaviorcenter.com/wp-content/plugins/super-forms/uploads/php/files/e8dcb9df292680959ce706e3ec104c5b/83971406064.pdfIn PDF document text
    • http://phdpecs.hu/userfiles/files/bipivi.pdfIn PDF document text
    • https://clove7.com/userfiles/file/40011986977.pdfIn PDF document text
    • http://mdbim.pl/ubezpiecz/obrazy/file/90929551165.pdfIn PDF document text
    • https://www.davinci.dk/wp-content/plugins/formcraft/file-upload/server/content/files/16100e1fa44c10---navemivejegalo.pdfIn PDF document text
    • http://nadiadsa.org/userfiles/file/nuxaxelo.pdfIn PDF document text
    • http://njf724.com/basefile/janatalnajafcom/files/pakot.pdfIn PDF document text
    • https://aspaeng.com/files/image/files/dimakiwizu.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_off0000f6cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6CB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010ee2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EE2 10704 bytes
SHA-256: aa8c6b994be2891391306c907d3ccba0cc71f49735259e649ee1762c5f04253b
font_02_sfnt_off0001277c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1277C 16712 bytes
SHA-256: 56a0aca5b27977dfda5b2c4d4f9b0034c122c2a6cfe533d8e64f6a7bcf042570

Open this report in the interactive analyzer, or submit your own file for analysis.