Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c2476f418f27f28…

MALICIOUS

PDF

78.1 KB Created: 2021-09-20 12:23:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 58d5772862dffff0476f14066949ed7b SHA-1: 274f11f6072f9ae0d3d4a1bd66bedcbed0411a84 SHA-256: 9c2476f418f27f28c33820ef27a6e3d67c5ec542f0b445220c4d29caa0e275ed
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous external URIs and is identified as a link farm on disposable hosting, suggesting a phishing or malware distribution scheme. The presence of embedded URLs points towards the document's role in directing users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

Heuristics 5

  • 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.
  • 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://smidgel.ru/uplcv?utm_term=iphone+5s+second+hand+price+in+pakistan PDF link annotation
    • https://protectname.xyz/whoisprivacy/userfiles/files/nepufu.pdfIn PDF document text
    • https://lengthening-sldf.com/userfiles/file/vosotivisejavegorurix.pdfIn PDF document text
    • http://hanstime.com/userData/board/file/gexarujavaf.pdfIn PDF document text
    • http://meteosputnik.ru/userfiles/file/40317326239.pdfIn PDF document text
    • https://sunrise-photon.com/upfiles/editor/files/xudiwovogaxufelalarifud.pdfIn PDF document text
    • https://sanmuabandoanhnghiep.org/images/content/files/11035673385.pdfIn PDF document text
    • http://brunagabriele.it/userfiles/files/40059354930.pdfIn PDF document text
    • https://lalicorne-hotel.com/userfiles/file/rejoxusenidekigegapafimo.pdfIn PDF document text
    • https://vidaleve.net/ckfinder/userfiles/files/46327698290.pdfIn PDF document text
    • http://leprofit.ee/cmsfile/contentfiles/garex.pdfIn PDF document text
    • http://dlzhrjd.com/images/uploadfile/files/gajuwolitijoxopeba.pdfIn PDF document text
    • http://photo-ostrov.com/ckfinder/userfiles/files/nusoveb.pdfIn PDF document text
    • http://rapet.hu/files/degugipasiwivo.pdfIn PDF document text
    • http://hfnhsw.com/upload/files/43413164066.pdfIn PDF document text
    • https://ballestermultiservicios.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613cecdb48216---dibod.pdfIn PDF document text
    • http://fotofolliasanlazzaro.it/userfiles/files/80302434963.pdfIn PDF document text
    • http://taispacedesign.com/upload/files/dutagipusemisosoxamif.pdfIn PDF document text
    • http://dgelc.com/userfiles/file/20210905011708.pdfIn PDF document text
    • https://htchninc.com/d/files/nonubafa.pdfIn PDF document text
    • http://tw-echen.com/uploads/files/202109112311099179.pdfIn PDF document text
    • http://pileshoppen.dk/userfiles/file/sejujipexenusevifu.pdfIn PDF document text
    • http://zs.tom.ru/jsplugins/ckfinder/userfiles/files/30070766458.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_off0000ca23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA23 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e235.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE235 18404 bytes
SHA-256: 2a41fe3449b75fdb96260e464e4b902bd0eb3d5c9a078adbee8e93b2026ac33b
font_02_sfnt_off00011195.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11195 10740 bytes
SHA-256: 5d55bc5efc31be32e42740e918b90c4e69eab068ef9d25de948e7b9c3459d662

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