Malicious PDF — malware analysis report

Static analysis result for SHA-256 7eaa2059e0dd00ec…

MALICIOUS

PDF

83.5 KB Created: 2021-09-15 19:34:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 34c45f71356fe52c9fd38deb2f9a4eb1 SHA-1: 0086b5f2787eeb22fdd8b5f1936f9e90891940c2 SHA-256: 7eaa2059e0dd00ec4b2fd7ce6c14b2248ef3d2c346c20488cac7ed72c3557af9
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, and exhibits characteristics of a link farm pointing to potentially compromised websites. The embedded URLs suggest an attempt to redirect users to external sites, which is a common tactic for phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and heuristic firings indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://pistant.ru/uplcv?utm_term=the+secret+of+white+mountain+pdf PDF link annotation
    • http://decaiyun.com/upload/file/2109042330420580715es7gut1k735.pdfIn PDF document text
    • http://livelyway.com/ckfinder/userfiles/files/401860935.pdfIn PDF document text
    • http://slmj8.com/data/userfiles/files/72254536497.pdfIn PDF document text
    • http://bannails.com/fckeditor_userfiles/file/powapitoja.pdfIn PDF document text
    • https://petikdaun.com/contents/files/burela.pdfIn PDF document text
    • https://grouptm2.com/contents/files/30276186449.pdfIn PDF document text
    • http://www.airportlimofortlauderdale.net/wp-content/plugins/formcraft/file-upload/server/content/files/1613c0f2636581---65982295079.pdfIn PDF document text
    • https://ariconium.cz/webpagebuilder/ckfinder/userfiles/files/damusuradobonukonajunus.pdfIn PDF document text
    • http://pokwuttibut.com/file_media/file_image/file/depetazi.pdfIn PDF document text
    • http://tindangnhadat.vn/upload/files/86254872631.pdfIn PDF document text
    • https://hmv.ir/wp-content/plugins/formcraft/file-upload/server/content/files/161419cfe05215---xiwexogexo.pdfIn PDF document text
    • http://konsultacjenaukowe.eu/Upload/file/51814598836.pdfIn PDF document text
    • http://hoya889.com/upfile/files/20210903105834.pdfIn PDF document text
    • http://hengtongrongshang.com/jingkelun/userfiles/files/20210912213253.pdfIn PDF document text
    • http://www.rlktechniek.nl/wp-content/plugins/formcraft/file-upload/server/content/files/161419dae1bfef---80401480021.pdfIn PDF document text
    • http://elard-group.com/ckfinder/userfiles/files/zunovabuboselejejumu.pdfIn PDF document text
    • http://olympicthesportshop.in/uploads/wugekorowogimixe.pdfIn PDF document text
    • http://www.barankayalar.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1613261d46424b---53406202620.pdfIn PDF document text
    • https://jatransfer.com/userfiles/file/23231222686.pdfIn PDF document text
    • http://garantc.ru/userfiles/file/bowubu.pdfIn PDF document text
    • https://promise-land.com/upload/file/moxisibavepawilivujizogu.pdfIn PDF document text
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/25bfbff958941864665a84d337e59b0d/92923178902.pdfIn PDF document text
    • http://erainbowrealty.com/userfiles/file/gisozabolibepuwilatafepew.pdfIn PDF document text
    • http://casavacanzesanvito.eu/userfiles/files/wowusozebipomuka.pdfIn PDF document text
    • https://rgcsmt.org/ckfinder/userfiles/files/92527713572.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_off0000de51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE51 10988 bytes
SHA-256: 21721e08491c502ce84a3c594c264a430b6f1d0bd001a319e657e9cd3ce2ae3f
font_01_sfnt_off0000f7c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7C0 17828 bytes
SHA-256: 19afe4a314f822495d5bc6772f91631341f5081328669a67721dffed44d5a752
font_02_sfnt_off00012633.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12633 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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