Malicious PDF — malware analysis report

Static analysis result for SHA-256 32a60c6c4ae91f22…

MALICIOUS

PDF

73.0 KB Created: 2021-10-01 07:31:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-20
MD5: eb3250072cbcc155d5992ea3f893ff0d SHA-1: 48e023775fa5e048d5f8f6bd2d7d509c9a1e1ea4 SHA-256: 32a60c6c4ae91f224e037e4f02d5a7b9fae4168bc84f95b85cb297dc884cbcc9
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is a PDF that contains numerous links to external websites, many of which are hosted on disposable domains or compromised CMS uploads, indicating a link farm or phishing lure. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9849

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://laborke.ru/uplcv?utm_term=flash+firmware+android+tv+box PDF link annotation
    • http://andlupa.com/userfiles/file/norilijibekaz.pdfIn PDF document text
    • http://www.deopendeur.org/imgUser/file/35562547868.pdfIn PDF document text
    • https://goldenparadisestsimons.com/wp-content/plugins/super-forms/uploads/php/files/26785beec340eb1d606c43d32b0462f7/rosimafi.pdfIn PDF document text
    • http://munnarinfo.in/userfiles/file/sagibomijewexiluleguvudoj.pdfIn PDF document text
    • https://ptogel2.com/contents/files/82100442592.pdfIn PDF document text
    • http://ville-dammarie.com/ckfinder/userfiles/files/jaguxafad.pdfIn PDF document text
    • https://kermanrooz.com/img/files/vumiguvifalilabo.pdfIn PDF document text
    • http://fabiocaronearchitetto.com/userfiles/files/fidoganewovizazu.pdfIn PDF document text
    • http://seoulsquare.com/userfiles/file/16800054495.pdfIn PDF document text
    • http://traditionsradio.com/wp-content/plugins/super-forms/uploads/php/files/5e665bea58bac91a1183ff629d952511/7547535269.pdfIn PDF document text
    • http://csc0535.com/userfiles/file/20210929060745_9e8ax0.pdfIn PDF document text
    • http://emeraldcovepartners.com/_data/images/file/63676385076.pdfIn PDF document text
    • http://3gr-group.com/ci/userfiles/files/83309351098.pdfIn PDF document text
    • https://tekstilkentrehber.com/upload/ckfinder/files/57097988129.pdfIn PDF document text
    • http://kengosushionlineorder.com/uploads/files/46459936639.pdfIn PDF document text
    • https://argekaucuk.com/nbg/upload/files/roxelotupimuruverovebeda.pdfIn PDF document text
    • https://cyklo-wellness-penzion-palice.cz/content/ramujo.pdfIn PDF document text
    • http://swiftnb.com/ckfinder/userfiles/files/wowol.pdfIn PDF document text
    • http://fortlauderdalelimorental.net/wp-content/plugins/formcraft/file-upload/server/content/files/1614f9a83cccbf---korubojo.pdfIn PDF document text
    • https://rossbeede.com/userfiles/file/risomofabexedexa.pdfIn PDF document text
    • http://nenorm.com/files/files/22339064711.pdfIn PDF document text
    • http://www.afurg.com.br/assets/ckfinder/userfiles/files/bokefururitumisigedukud.pdfIn PDF document text
    • https://eledigitalpr.it/allegati/file/ropomakoj.pdfIn PDF document text
    • http://immobilieninvestors.eu/userfiles/file/xibupibuje.pdfIn PDF document text
    • http://giovanninociti.com/userfiles/files/wegisuwomesititufen.pdfIn PDF document text
    • https://www.rt9.rspo.org/ckfinder/userfiles/files/79939502140.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_off0000b470.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB470 18036 bytes
SHA-256: da6250d9f567c72ed85ebf09ee5bf69fde3534a88e46f6862277bbfd35a10a38
font_01_sfnt_off0000e364.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE364 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000fb7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB7B 10992 bytes
SHA-256: 569b733861a2afa8200a8e4f718367c4b26c1a9bc3be9b30752230beae8fdf5c

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