Malicious PDF — malware analysis report

Static analysis result for SHA-256 06da8b14b78399a9…

MALICIOUS

PDF

84.7 KB Created: 2021-09-15 12:26:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 1108553207ca2a2ad01ae5e386ed6943 SHA-1: 510469aba3d2fd635de01716f4919c19e8b275a1 SHA-256: 06da8b14b78399a998a02a4a2167867e0127d42d21543271dd7dccb0de82f6cb
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains a large number of external URIs pointing to a link farm hosted on disposable domains, suggesting a phishing or malware distribution attempt. The presence of a 'download button' heuristic further supports the lure-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://chcial.ru/uplcv?utm_term=aksar+2+full+hd+movie+download PDF link annotation
    • http://gt-outillages.fr/ressource/site-image/files/59185702427.pdfIn PDF document text
    • https://semut73.com/contents/files/segek.pdfIn PDF document text
    • http://dc-07b6a75bc4d0.breakthrough-physical-therapy.com/userfiles/files/jarosejigavidu.pdfIn PDF document text
    • https://ristovski.mk/public_html/upload/userfiles/file/29781700993.pdfIn PDF document text
    • https://htcpost.vn/vietpost.vn/img_content/file/bedodabidubimadutisusuwo.pdfIn PDF document text
    • https://alaqart.atelierleuthold.ch/userfiles/files/46335273477.pdfIn PDF document text
    • https://profession-your-dr.com/uploads/files/202109101245591976.pdfIn PDF document text
    • https://socialacademy.gr/wp-content/plugins/super-forms/uploads/php/files/c4e454cf1d54f2930a8f65c9c9de991d/degigilinuv.pdfIn PDF document text
    • https://greenlakepaint.com/ckfinder/userfiles/files/tojilusobode.pdfIn PDF document text
    • http://spodne-pradlo-2bpoint.sk/UserFiles/File/josefakumumawureropemexig.pdfIn PDF document text
    • http://theonejsc.com/userfiles/file/17495191158.pdfIn PDF document text
    • http://suma.ca/upload/editor/file/welajuda.pdfIn PDF document text
    • http://all-paca.com/ckeditor/ckfinder/core/connector/php/uploads/files/31418882212.pdfIn PDF document text
    • https://washlounge.in/ckfinder/userfiles/files/tepusole.pdfIn PDF document text
    • http://hrdiborice.cz/erucom1/files/files/mozisusewiwoj.pdfIn PDF document text
    • http://canshu.dlzj.net/upload/files/20210906120025751062.pdfIn PDF document text
    • http://iltorg.ru/upload/file/35485761010.pdfIn PDF document text
    • http://gruppocaminiti.it/userfiles/files/zidadazaso.pdfIn PDF document text
    • https://absoluteanytime.com/media_file/files/files/11525239045.pdfIn PDF document text
    • http://yourhandmadeitems.com/userfiles/file/zedidixis.pdfIn PDF document text
    • http://deauville.ru/files/file/xojija.pdfIn PDF document text
    • http://aisne.proximeo.com/ckfinder/userfiles/files/54020317466.pdfIn PDF document text
    • http://www.radeton-cz.vasestranky.cz/ckfinder/userfiles/files/65942983994.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_off0000e653.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE653 17468 bytes
SHA-256: b65c379b2afd7b7d5d957dba4f75775be32e675132f271fb0802c2a241372f86
font_01_sfnt_off0001138a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1138A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012ba1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BA1 10968 bytes
SHA-256: 65599ecb8d91fbcad15dd45e969ee1ff541eb815a3bc94b5bc282b3512cf7899

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