Malicious PDF — malware analysis report

Static analysis result for SHA-256 9985ef319c04b9fd…

MALICIOUS

PDF

76.5 KB Created: 2021-09-13 08:05:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 0a70a5868cb2d65519f7d9890157cf9f SHA-1: c37c27a2894bc2f023c705c7a4293c6fb6d90b9d SHA-256: 9985ef319c04b9fdbbe46beab581e2d17b43ba51267d3dc65a5651e320da9fbc
134 Risk Score

Malware Insights

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

The PDF contains multiple external URIs and is flagged as a link farm on disposable hosting, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The presence of a 'download button' heuristic further supports the lure-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://philabc.ru/uplcv?utm_term=hq+tv+apk PDF link annotation
    • https://maharajganjtimes.com/assets/ckfinder/core/connector/php/uploads/files/sutavuv.pdfIn PDF document text
    • https://stvorki.ru/files/file/11196083645.pdfIn PDF document text
    • http://www.morrisjones.co.uk/EditorImages/file/85787405877.pdfIn PDF document text
    • http://cecev.com/stockages/files/pinugeda.pdfIn PDF document text
    • https://signos.larrialdiak.es/files/galeria/files/vijos.pdfIn PDF document text
    • http://ouhkpthaa.org/userfiles/gibajogozawosava.pdfIn PDF document text
    • https://mmagame.com/userfiles/file/30068325632.pdfIn PDF document text
    • http://etkenkalip.com/files/logotoxogidufozevaze.pdfIn PDF document text
    • https://beautydiction.com/ckfinder/userfiles/files/38875521631.pdfIn PDF document text
    • https://cicadit.ro/UserFiles/file/8608249683.pdfIn PDF document text
    • http://uitvaartverzorgingsindex.nl/images/uploads/sujuwis.pdfIn PDF document text
    • https://parc-hotel.info/file/81938509418.pdfIn PDF document text
    • http://creative-format.com/upload/editor/files/78980776831.pdfIn PDF document text
    • https://www.darrellstuckey.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613eb4d685e7a---pupunexomanivakon.pdfIn PDF document text
    • https://vadihosting.com/calisma2/files/uploads/getawufo.pdfIn PDF document text
    • http://ucg-eg.com/userfiles/file/terukefuxelosoxeg.pdfIn PDF document text
    • http://sakesushilakehavasu.com/uploads/files/fizeb.pdfIn PDF document text
    • http://ain.proximeo.com/ckfinder/userfiles/files/pisixezim.pdfIn PDF document text
    • http://bsbcarpet.com/userfiles/file/gilezul.pdfIn PDF document text
    • http://maslag.eu/userfiles/file/7521797791.pdfIn PDF document text
    • https://dutchfansitenetwork.nl/ckfinder/userfiles/files/80919084407.pdfIn PDF document text
    • http://bursaceyizgelinlik.com/images_upload/files/99300541469.pdfIn PDF document text
    • https://o2opr.co/userfiles/files/xatal.pdfIn PDF document text
    • http://fotostudiovaccari.it/userfiles/files/jafopusozuken.pdfIn PDF document text
    • https://makemycake.gr/wp-content/plugins/super-forms/uploads/php/files/ubu17eqn3d7og6d3m5vkggmmr5/fajibexagaroxipezas.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_off0000c9b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9B2 9776 bytes
SHA-256: 11e60f5642a6bc5556a69ce369fe29791de162b10ce8e0fc8be3a4e9c601204c
font_01_sfnt_off0000df31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF31 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f743.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF743 17672 bytes
SHA-256: 5cb9e77f9f50d3ea6ce6558982d4a8367ad802874c707ad487d27863f698c1ba

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