Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6d9b73fc8d1b558…

MALICIOUS

PDF

73.9 KB Created: 2021-09-09 03:44:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 00810a8f53b22a5ad686fabfa5a93f2a SHA-1: 2ffc210c5839540faa6e8d26e2d3e467402ddd94 SHA-256: d6d9b73fc8d1b558ac0e81456a1dcc461605b86d5c65c86db43726d8595f8c6c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The file contains a link farm with numerous URLs pointing to disposable hosting and compromised CMS uploads, indicating an attempt to redirect users to malicious content. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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
  • 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 http://tipsclubcr.com/campannas/file/37011932666.pdf In PDF document text
    • https://eclipsetheaters.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612e9fa05ada9---37476593244.pdfIn PDF document text
    • http://braintradingbcn.com/wp-content/plugins/super-forms/uploads/php/files/ae03a870fa4846222e2661a56e99bcf0/veridugasut.pdfIn PDF document text
    • http://ssaisarang.com/ckfinder/userfiles/files/vupesoradazekomopetuxa.pdfIn PDF document text
    • https://parfumzone.ro/files/file/tusebisosiradafopuzinibar.pdfIn PDF document text
    • https://ever-progress.dacola.com/upload/files/95252829011.pdfIn PDF document text
    • http://amblesidewindermere.ca/fckuploads/images/file/64893445724.pdfIn PDF document text
    • http://buzmakov-ua.ru/admin/ckfinder/userfiles/files/xurilomadaruj.pdfIn PDF document text
    • http://pcwenhua.com/uploadimg/file/16309818791165398172.pdfIn PDF document text
    • http://xn--12cm8caae5d9a0a0a1dxk6dd.com/user_img/files/25669450083.pdfIn PDF document text
    • http://kxxbs.com/uploadfiles/file/a/65083748144.pdfIn PDF document text
    • http://studiotecnicofrisoli.com/userfiles/files/4744866471.pdfIn PDF document text
    • http://energo-market.ru/sadm_files/91316040067.pdfIn PDF document text
    • http://kaus21.com/userData/board/file/dododivosuzewubibinaxom.pdfIn PDF document text
    • http://melissajacksonmd.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132e4fe559c2---xagiz.pdfIn PDF document text
    • http://sovaimm.it/userfiles/files/digagadakomunag.pdfIn PDF document text
    • https://microfocus-realize2020mea.com/wp-content/plugins/super-forms/uploads/php/files/251f59c99bf2d86a926a3bd1ad60470a/rojuw.pdfIn PDF document text
    • http://bimbrlata.cz/UserFiles/File/23513412886.pdfIn PDF document text
    • http://www.stratcareerservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134c0ecd73c0---xufimumewimafaguruxubokuk.pdfIn PDF document text
    • http://www.adarshvidhyasankul.org/userfilesfile/29151737983.pdfIn PDF document text
    • http://archiw.bibliotekalesmierz.eu/img/upload/files/26183532760.pdfIn PDF document text
    • http://mathrainbow.com/userfiles/file/vimowesad.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=sonic+forces+android+downloadPDF link annotation
    • 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_off0000bcd1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBCD1 17500 bytes
SHA-256: 49cde69c2d90730e0457cbbe63dad77e258fbd316656a952516a5db160af32b4
font_01_sfnt_off0000e9cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9CD 10532 bytes
SHA-256: e13f021b1c8ba5771adedff948dfca58c79528b3326e230869104024f74aa8bb
font_02_sfnt_off000101ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101ED 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1