Malicious PDF — malware analysis report

Static analysis result for SHA-256 c483f34840c9ecea…

MALICIOUS

PDF

83.0 KB Created: 2021-09-21 14:10:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-20
MD5: fc89f037c33467889410ae881305f5a7 SHA-1: ce006bb9337d7b15c2fb508c5d2f21e645384742 SHA-256: c483f34840c9ecea1eaa7011aa95940bfe4eca9404d28541e6f8a40058b41b1f
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

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. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a malicious workflow designed to trick users into downloading further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://queure.ru/uplcv?utm_term=raees+movie+free+download+for+mobile PDF link annotation
    • http://websteravelandscaping.com/editorData/file/wanerinoloribubozizokavuv.pdfIn PDF document text
    • http://hnc2.com/userfiles/file/pujiro.pdfIn PDF document text
    • http://ressourcengarten.de/azubi/userfiles/files/54931975827.pdfIn PDF document text
    • http://ilturismoinitalia.it/userfiles/files/lufim.pdfIn PDF document text
    • http://honghuibio.com/d/files/kuwapanemewufibab.pdfIn PDF document text
    • https://dlt-nkp.com/fileupload/file/77776359149.pdfIn PDF document text
    • https://tradegateindia.com/userfiles/file/527204097.pdfIn PDF document text
    • http://skpizzasubs.com/uploads/files/90365380688.pdfIn PDF document text
    • http://xn--12cm8caae5d9a0a0a1dxk6dd.com/user_img/files/tupozara.pdfIn PDF document text
    • https://keyword-lda.pt/site/upload/file/71819785388.pdfIn PDF document text
    • https://mattress-leader.com/media/47137725180.pdfIn PDF document text
    • http://garankuccu.com/upload/fckimagesfile/9ea15649eca037385ed27c719f1fd551.pdfIn PDF document text
    • http://www.louthadventures.ie/wp-content/plugins/formcraft/file-upload/server/content/files/1613f933741e9e---18619575537.pdfIn PDF document text
    • http://perevodvnegiloifond.ru/pict/file/wawujapiperimiz.pdfIn PDF document text
    • https://kanat.com/upload/ckfinder/files/12588165004.pdfIn PDF document text
    • http://hangnhatbanonline.com/upload/files/tadakisa.pdfIn PDF document text
    • http://tokyosushilohaus.com/uploads/files/fiwexowusodiroki.pdfIn PDF document text
    • https://asiantms.com/ckfinder/userfiles/files/4426015204.pdfIn PDF document text
    • http://semihkerpiccilervesupersound.com/upload/file/67836165618.pdfIn PDF document text
    • http://biaikatolikus.hu/files/file/69709004010.pdfIn PDF document text
    • http://biplano.eu/userfiles/files/xiwulevekuvim.pdfIn PDF document text
    • http://xn--80aer5aza.xn--19-kmcm3c.xn--p1ai/ckfinder/userfiles/files/lowujezoli.pdfIn PDF document text
    • https://gresathouse.com/wp-content/plugins/super-forms/uploads/php/files/94f4e4e8fe1f658661137879f0ea4456/gatunawizezodupajifafasu.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_off0000e115.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE115 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f92c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF92C 10752 bytes
SHA-256: 914324b401ac4a5586e36cef229c5130377f1ba6f31923a1fd94885d1d646141
font_02_sfnt_off000111ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111EA 17224 bytes
SHA-256: 9eb61d2d265e6b8df26d924a882a17d28cacd042f00e202835c9104d4988c3f7

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