Malicious PDF — malware analysis report

Static analysis result for SHA-256 72d1f0e062d1109e…

MALICIOUS

PDF

91.3 KB Created: 2021-08-05 16:10:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 99ce799800603436c53eb380e360d4ae SHA-1: c5832d1054de2597c7c2d37e39e12b536c4a3763 SHA-256: 72d1f0e062d1109e4ac39ce0f45568e05f7c05e7b545d097221803cd99a28473
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or trojan distribution attempt. It contains a link farm pointing to compromised WordPress uploads and other disposable hosting, likely serving as a lure to download malware, as suggested by the 'utm_term=download crack' parameter in one of the URLs. No scripts were extracted, but the PDF structure and URL patterns strongly suggest a malicious intent to trick users into downloading potentially harmful files.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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 https://pistant.ru/uplcv?utm_term=download+crack+vmware+workstation+14
    • http://geodez.com/pliki/file/94834124582.pdf
    • http://arunimaflavours.com/userfiles/file/favapigexirefelaramozo.pdf
    • https://motionslam.com/wp-content/plugins/super-forms/uploads/php/files/34f5a75303919892af799d1689cef9ec/wowojazizanimi.pdf
    • https://estoniapools.com/contents//files/28253740604.pdf
    • https://bykevin.com/wp-content/plugins/super-forms/uploads/php/files/3898be981db9299be28bd47ed0911bbf/93184046362.pdf
    • http://writtenmail.com/upload_images/file/23248955431.pdf
    • http://www.alfainstal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160c7a7206c8aa---niwup.pdf
    • https://livingcircles.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160b8c6493fe8c---32096963805.pdf
    • https://zzwgjx.com/d/files/narurepikonazojif.pdf
    • http://hani-bee.com/userfiles/files/wapumuganavo.pdf
    • https://advance-pack.com/editor_upload/file/35515098577.pdf
    • http://batiment-tunisie.com/userfiles/file/90837043050.pdf
    • https://www.hed-endo.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160f44654908f8---69215599627.pdf
    • https://eyestech.in/wp-content/plugins/super-forms/uploads/php/files/2lsakv87hrpl1vcok6lldsl7lb/30868115924.pdf
    • http://ahchala.com/img/file/67098291891.pdf
    • http://thaide.org/userfiles/file/13319335436.pdf
    • https://xn--80aaa1anac6cg.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/4e088f1fcdbf0e4a0a2541d5c56fd9f6/72426206807.pdf
    • https://prikolnaya.com/wp-content/plugins/super-forms/uploads/php/files/05bdd63c0cd48c44335618637ddfefa0/kiditidutukisigotute.pdf
    • https://cashofferoregon.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca5480a5fd---vaxuzijinapisoxinelekadow.pdf
    • https://tecnibat.net/uploads/archivos/leburagisejukuwed.pdf
    • http://www.megasaludips.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fe8998207c---77563672155.pdf
    • https://monarchwinemerchants.com/wp-content/plugins/super-forms/uploads/php/files/4d81e440cdc5cac5c9bb6cfb1a63fbb6/gujolumewexedaxazaxopu.pdf
    • https://www.prowallpanama.com/wp-content/plugins/super-forms/uploads/php/files/7c5d0ab0bb4782bd605a0d19dbc2bea8/46899719349.pdf
    • https://gmonlinestore.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606e8aad612e3---miletidowigububobodegabu.pdf
    • http://coimbrasoftware.hu/images/uploads/files/sadadegilekonutu.pdf
    • https://c��ngngh���360.vn/category/review
    • https://c��ngngh���360.vn
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000edec.bin
979bc932d29d0e3a344a64b3d32982e000b39bd36a89bf46d425ec01d94f3f0f
pdf-font-stream PDF embedded font (sfnt) at offset 0xEDEC 10908 bytes
font_01_sfnt_off00010747.bin
5faa25ead4fae5d644ee6ab7fc87ad53bab244c8a3f08c969cb1a108f7024cc8
pdf-font-stream PDF embedded font (sfnt) at offset 0x10747 30284 bytes
font_02_sfnt_off0001455e.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1455E 16792 bytes