Malicious PDF — malware analysis report

Static analysis result for SHA-256 1eb3499df8625686…

MALICIOUS

PDF

81.7 KB Created: 2021-10-05 08:46:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: c48ca7f60079fdebdc3753f203f9dcf1 SHA-1: 54b33dd21de5005c5f0e015da50ac197ba2d8fe7 SHA-256: 1eb3499df8625686e62c8d7ed0d0fdcd42c595920c66a9983aa73e2ccc51a56c
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous 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, likely to trick users into downloading a secondary payload disguised as a game download. No scripts were extracted, but the PDF structure and embedded URLs point towards a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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://pistant.ru/uplcv?utm_term=the+hobbit+game+2003+pc+download PDF link annotation
    • http://dnepropress.net/files/file/31502198733.pdfIn PDF document text
    • http://trenermichal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/161487b5f98b5f---vitidemofidulavaloj.pdfIn PDF document text
    • http://attep.com/home/sandbox/domains/heekee.com.hk/public_html/ckfinder/userfiles/files/kifeli.pdfIn PDF document text
    • http://szm.hu/userfiles/file/50103817773.pdfIn PDF document text
    • https://hmanagement.net/userfiles/file/buraxi.pdfIn PDF document text
    • http://hooleihomes.com/cms_images/file/53937905133.pdfIn PDF document text
    • http://stolizstekla.ru/userfiles/file/82165056131.pdfIn PDF document text
    • http://zetrade.cz/userfiles/file/3753532717.pdfIn PDF document text
    • https://www.mediawerf.nl/bundles/store24backoffice/ckfinder/userfiles/files/72033061870.pdfIn PDF document text
    • http://take114.kr/FileData/ckfinder/files/20210902_A0F722B9C6DC75E0.pdfIn PDF document text
    • http://hurtglass.pl/upload/file/16004582827.pdfIn PDF document text
    • http://basketaci.cz/UserFiles/File/gijedezo.pdfIn PDF document text
    • https://broadcasthub.com/ci/userfiles/files/97309019049.pdfIn PDF document text
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/f3ec1b9b1ea87a2ead3d1e4febc13dbb/xenajisoluta.pdfIn PDF document text
    • http://turksebruiloften.nl/userfiles/file/wesukemodupumutelij.pdfIn PDF document text
    • http://sun-tes.ru/files/file/jirezavazapojirixineb.pdfIn PDF document text
    • http://bsa-billiard.by/images_from_html_editor/file/zipesadelu.pdfIn PDF document text
    • https://bravo-hk.com/userfiles/file/jaxukojulonu.pdfIn PDF document text
    • http://ndc-group.ru/uploads/files/zawetuxife.pdfIn PDF document text
    • https://fokusmedia.com/images/uploads/64495293167.pdfIn PDF document text
    • http://technology-mp.it/userfiles/files/putapitupirunopanobu.pdfIn PDF document text
    • http://digilit.ir/basefile/digilitir/files/wolep.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_off0000d6f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6F6 18592 bytes
SHA-256: d5d4f8bc0702cd4efe05429eab875d7285a074c75391f1b8b869fb9081b89973
font_01_sfnt_off0001071e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1071E 11296 bytes
SHA-256: 34dd9c2fc274b11dfed755b8137fc48398a3c7d9700222ff9fcd0dc1b9c9c32d
font_02_sfnt_off0001212e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1212E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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