Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d9bf96208747f39…

MALICIOUS

PDF

80.9 KB Created: 2021-09-05 13:55:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: 0a63929b5a904c874b5fab8876f00eed SHA-1: 48e73f6221f28d424d03d564d2b37163ebf0bf19 SHA-256: 6d9bf96208747f39ba356857a51187e905dcafd743632369752813915827fa98
196 Risk Score

Malware Insights

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

This PDF document is classified as malicious, exhibiting characteristics of a phishing and potential malware distribution lure. The document body is heavily obfuscated, but heuristics indicate it attempts to trick the user into installing a browser extension or update. Multiple external URLs are present, many hosted on compromised CMS uploads or disposable domains, suggesting a link farm designed to redirect users to malicious sites. The ClamAV detection and ML classifier further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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://synerhu.ru/uplcv?utm_term=honeywell+wifi+thermostat+manual+8580 PDF link annotation
    • http://citygclub.com/ckupload/files/minon.pdfIn PDF document text
    • http://multiseal.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/1609729275c035---narorovuvemigojafizapidu.pdfIn PDF document text
    • http://vrajacreation.com/uploaded_files/userfiles/files/99191979410.pdfIn PDF document text
    • http://sns.hu/_user/file/96185368399.pdfIn PDF document text
    • http://energo-winstal.pl/userfiles/file/24137195886.pdfIn PDF document text
    • https://ambientltg.com/wp-content/plugins/super-forms/uploads/php/files/ee20a7de816a2d43b19d54615a22aeff/58057176154.pdfIn PDF document text
    • https://www.cedicar.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076d2d3b13ce---93071924808.pdfIn PDF document text
    • http://mastrodibaglio.it/userfiles/files/97548893028.pdfIn PDF document text
    • https://lesura.net/userfiles/file/xoxisodagebirizexojasoj.pdfIn PDF document text
    • http://escritacontabilidade.net/fotos/news/file/kigivakinepixokopufiminuv.pdfIn PDF document text
    • http://geology.ie/wp-content/plugins/formcraft/file-upload/server/content/files/16082b919631f2---xuwumixaziso.pdfIn PDF document text
    • https://pluviaterra.mx/wp-content/plugins/super-forms/uploads/php/files/011f0a95d297084585b24f1d4bc364a0/rabawogej.pdfIn PDF document text
    • http://sochi-vitrazhi.ru/ckfinder/userfiles/files/89397592722.pdfIn PDF document text
    • https://baodinhsolar.com/wp-content/plugins/super-forms/uploads/php/files/qc8c3l0amqnb2favn6jld15ph5/42359497870.pdfIn PDF document text
    • http://thuocnam.xyz/images/files/94619866060.pdfIn PDF document text
    • http://biaikatolikus.hu/files/file/jijezivufamuduriluvitop.pdfIn PDF document text
    • https://nanyangtextile.com/userfiles/file/garewemalewufasu.pdfIn PDF document text
    • https://zazilha.com.mx/wp-content/plugins/super-forms/uploads/php/files/3f425c193839a7fa7b167869c954c7d4/33777273714.pdfIn PDF document text
    • https://cesiedizioni.com/userfiles/file/rebajusexidumesonu.pdfIn PDF document text
    • https://peilimineko.com/userfiles/file/devid.pdfIn PDF document text
    • http://www.jcca.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/160acc57f5ae94---ramoxomuzapo.pdfIn PDF document text
    • http://tdjl.com/uploadfile/file///2021090120240554.pdfIn PDF document text
    • http://aimic.com/userfiles/file/varin.pdfIn PDF document text
    • http://interface-referencement.com/userfiles/file/wuvesozidi.pdfIn PDF document text
    • http://sad-azov.ru/wp-content/plugins/super-forms/uploads/php/files/492362de39e729172f45abb7950dceeb/16240427686.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_off0000d4f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4F1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ed08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED08 11232 bytes
SHA-256: 3f2968f328045224bb081b043cb77ce0600cc51f2d1f9e284c223e5a1950084e
font_02_sfnt_off00010740.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10740 17908 bytes
SHA-256: bd628fbfa00855539923054d814cba2846f4c336f850e5b1f8a95262651c3afb

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