Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e2668181480e2a8…

MALICIOUS

PDF

83.8 KB Created: 2021-08-10 01:32:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: a5c56561e70cb531a1992b7b41edb1bb SHA-1: 6ae29312cf3dec5d95fb6793c3b79e2b4852fe43 SHA-256: 7e2668181480e2a86ab1ae91bf26bdc117c1269f81da13d7125bcbe2408f8afc
164 Risk Score

Malware Insights

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

The file is identified as malicious by a ClamAV signature and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external links, many pointing to compromised CMS uploads or disposable hosting, suggesting a phishing or malware distribution scheme. The presence of a 'download button' lure further supports this, aiming to trick users into downloading a payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9934

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
  • 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.
  • 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+one+ring+roleplaying+game+pdf+download PDF link annotation
    • http://piau-po21inn.com/CKEdit/upload/files/88799167065.pdfIn PDF document text
    • https://postscriptproductions.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ee7e7330b2---67430955674.pdfIn PDF document text
    • http://liveisagenix.com/ckfinder/userfiles/files/mexajevorezemeselapis.pdfIn PDF document text
    • https://bohemiamaestro.com/webpagebuilder/ckfinder/userfiles/files/60821623587.pdfIn PDF document text
    • http://daindnc.com/fckeditor/userfiles/file/rupowopeno.pdfIn PDF document text
    • https://northwestconvention.cz/data/files/6634600280.pdfIn PDF document text
    • https://www.ideaklinikizmir.com/wp-content/plugins/formcraft/file-upload/server/content/files/160761ba67e76c---30615321255.pdfIn PDF document text
    • https://argumentua.com/i/file/semasiwuvaxaga.pdfIn PDF document text
    • http://mmt24.ru/files/file/duserekovaguzeriwenote.pdfIn PDF document text
    • http://hulstcustoms.ru/uploads/files/17951240836.pdfIn PDF document text
    • http://zartmobilia.com/userfiles/file/20210714105745.pdfIn PDF document text
    • https://bleikss.com/userfiles/file/91013343570.pdfIn PDF document text
    • http://fujavietnam.com/images/Download/rurolozosif.pdfIn PDF document text
    • http://seyrimerdin.com/userfiles/file/73914003137.pdfIn PDF document text
    • http://www.veronicaneal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/160aa60522354e---vilasobibexamupututab.pdfIn PDF document text
    • http://aplus.to/userfiles/file/wewesodesozolesujajilap.pdfIn PDF document text
    • https://travelinnsuites.com/nbloom/fckuploads/file/78135337557.pdfIn PDF document text
    • https://protradingindia.net/userfiles/file/53833284879.pdfIn PDF document text
    • http://chi-kara.net/userfiles/file/kegadederujevavimuf.pdfIn PDF document text
    • https://jpjplumbingandheating.com/FCKeditor/file/gazaropizo.pdfIn PDF document text
    • http://mkconline.com/landmark/ckfinder/userfiles/files/mufiz.pdfIn PDF document text
    • http://www.fullmooneye.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b00e8215d22---68031636054.pdfIn PDF document text
    • http://everest-c.ru/ckfinder/userfiles/files/kidis.pdfIn PDF document text
    • http://sazjah.com/wp-content/plugins/formcraft/file-upload/server/content/files/160780f3110463---59938906715.pdfIn PDF document text
    • https://www.skyline-recruiting.com/wp-content/plugins/super-forms/uploads/php/files/f67c9e28d23b40883c8c36a3c7d97057/68017793798.pdfIn PDF document text
    • http://westleyden72reunion.com/clients/4/46/469dc9162705cbff2d1fbe132f144f37/File/28063599688.pdfIn PDF document text
    • https://marljivo.hr/userfiles/file/pimazurigupopaxovipesi.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_off0000e365.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE365 17092 bytes
SHA-256: 406f1ac7522c3b8c4cc922632e5bfb6061ef92cd5820d6eb3392914d26c0245b
font_01_sfnt_off00010fc8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FC8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000127df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127DF 10844 bytes
SHA-256: d0326b83f27461b937761e5b17ef9b8ea45c7e629232162ff83bac2e3303ab89

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