Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7ebfebc2128288e…

MALICIOUS

PDF

83.3 KB Created: 2021-09-13 02:31:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 37f8c1c391018a55220249944e876f33 SHA-1: e9577bac1da9f1d85a13c640de8812ca842ff681 SHA-256: d7ebfebc2128288e12d4b84b0f8ce9de769113304de74d4a5cffe2762c06772c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to various domains, many of which are hosted on compromised CMS platforms or disposable hosting, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the heuristic firings and URL analysis point to a malicious document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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://philabc.ru/uplcv?utm_term=pirate+bay+proxy+proxy PDF link annotation
    • http://p-energo.ru/content/file/wajolegezefanarikutover.pdfIn PDF document text
    • http://ogledalata.bg/uploads/pages/files/kepoki.pdfIn PDF document text
    • https://g-ortho.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1612fea9c263fc---rafumaxuvepewotufur.pdfIn PDF document text
    • http://ipjanah.ir/wp-content/plugins/super-forms/uploads/php/files/inqg9jt3ika82bf17pa3m7hqr8/runajamuguleporiwe.pdfIn PDF document text
    • http://engroupe.ca/aym_image/files/tifakolugit.pdfIn PDF document text
    • http://tsrmvolontari.it/userfiles/files/kisaxexudufug.pdfIn PDF document text
    • https://parisautotravel.com/wp-content/plugins/super-forms/uploads/php/files/148o51gj82lpk80gttfva6s864/95545026528.pdfIn PDF document text
    • https://cargoservice.pl/cargoservice/userfiles/file/94596954958.pdfIn PDF document text
    • http://www.commandinglife.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f1bc0c6320---73490465090.pdfIn PDF document text
    • https://www.capitalroofingct.com/wp-content/plugins/formcraft/file-upload/server/content/files/161302a79d7818---jekadatenadinixujuro.pdfIn PDF document text
    • https://www.albriug.com/static/editor/ckeditor/ckfinder/upfile/files/93296899807.pdfIn PDF document text
    • https://kindeeyudee.com/ck_files/files/letowubazawewi.pdfIn PDF document text
    • http://imapbook.com/fckeditor/editor/filemanager/connectors/php/userfiles/file/dubefedulexesanivi.pdfIn PDF document text
    • http://texinpack.com/uploadfile/file///2021090207494821.pdfIn PDF document text
    • http://vietdubai.com/userfiles/file/43358028596.pdfIn PDF document text
    • http://www.ags-sib.ru/ckfinder/userfiles/files/97201665955.pdfIn PDF document text
    • http://myucpb.com/userfiles/file/wenitoleve.pdfIn PDF document text
    • http://maximaviajes.com/FCKfiles/file/nutusufunumodumopebawe.pdfIn PDF document text
    • http://ifa-astrologie.de/userfiles/file/18323742395.pdfIn PDF document text
    • https://altonika.pro/files/fck/file/4392243671.pdfIn PDF document text
    • https://www.bakkersvlaanderen.be/resources/plugins/ckfinder/userfiles/0/files/79576259325.pdfIn PDF document text
    • https://artofsurfing.com/preview/ckfinder/userfiles/files/lugirutagoko.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_off0000e165.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE165 17876 bytes
SHA-256: 816c391a5bc81147519536203937e21bd77bc0811fb9ffeb9894f5ca510af41c
font_01_sfnt_off0001104e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1104E 10284 bytes
SHA-256: 1446aaebcd5eab07dd0f1555cd11fd0e059f188c155b0b23b88cff8cc65aa6bc
font_02_sfnt_off00012769.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12769 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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