Malicious PDF — malware analysis report

Static analysis result for SHA-256 482ba94b4e1854b9…

MALICIOUS

PDF

85.2 KB Created: 2021-07-02 15:14:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 348aed9a7b3ab200ba324fd6615a10d2 SHA-1: 060224817192f1e159652130ec449e5dbeb6fcb7 SHA-256: 482ba94b4e1854b9891e55417431fa5be3e1667b63296d2db58adfbc85e89fbf
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, suggesting an attempt to redirect users to malicious content. The presence of embedded URLs and the nature of the heuristics indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://smidgel.ru/uplcv?utm_term=mary+oliver+wild+geese+1986 PDF link annotation
    • https://sdyh.gr/wp-content/plugins/super-forms/uploads/php/files/dmpf8k6jh224jvasgfgbrr0nd0/51836485393.pdfIn PDF document text
    • https://www.advids.co/wp-content/plugins/formcraft/file-upload/server/content/files/160b115006f48c---pafusetavuk.pdfIn PDF document text
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/ec5b0bce9c05b24cca9086cbe064465a/14178784434.pdfIn PDF document text
    • http://aarogyamedico.com/userfiles/file/84121287388.pdfIn PDF document text
    • http://linkingpeople.info/userfiles/file/65558845786.pdfIn PDF document text
    • https://kimtuong.vn/isc/public/files/fckupload/file/5720702633.pdfIn PDF document text
    • https://diversifiedhumansolutions.com/wp-content/plugins/super-forms/uploads/php/files/b9d45e515d9c2578b4d2dc47c64eef4f/tuzukodikewuzik.pdfIn PDF document text
    • https://chamsocmuihong.com/wp-content/plugins/super-forms/uploads/php/files/9t5a6t569f1lqh87sqk534l6u2/56019402273.pdfIn PDF document text
    • http://agnieszkapawlik.com/userfiles/file/29154412933.pdfIn PDF document text
    • https://www.chortho.co.uk/wp-content/plugins/super-forms/uploads/php/files/1spm9vq920nnnl83tk3rsadbhk/sevanokoboxemuwelumital.pdfIn PDF document text
    • http://sarlampa.ru/upload_picture/kewilelomef.pdfIn PDF document text
    • http://3handseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd36b6419c5---46549825561.pdfIn PDF document text
    • https://bf-pomosch.ru/wp-content/plugins/super-forms/uploads/php/files/eim6ga6cnb4hqdoorouurvqof7/92725427640.pdfIn PDF document text
    • http://walthamclassof1985.com/clients/5/52/52060312c10aa816a718e90a19a6a7a1/File/30256042744.pdfIn PDF document text
    • https://highrise.pl/file/13425679295.pdfIn PDF document text
    • https://churchosonline.com/wp-content/plugins/super-forms/uploads/php/files/80f9560417099652a485a1a62b704640/genetol.pdfIn PDF document text
    • https://paloaltospeakerseries.com/wp-content/plugins/super-forms/uploads/php/files/3bdb912819e9105cee8d79cd0502503c/48287404755.pdfIn PDF document text
    • http://stressmanagement-karriere.de/userfiles/file/17804251350.pdfIn PDF document text
    • https://cafemocion.com/userfiles/file/pazubin.pdfIn PDF document text
    • https://suksesunited.com/contents//files/pusexalofurukis.pdfIn PDF document text
    • http://www.toptehnik.si/images/96753432429.pdfIn PDF document text
    • http://fsoa.cn/userfiles/file/nozifaxidaj.pdfIn PDF document text
    • https://kar360.com/resimler/files/megitagi.pdfIn PDF document text
    • http://www.louthadventures.ie/wp-content/plugins/formcraft/file-upload/server/content/files/1607794453475c---59234157562.pdfIn PDF document text
    • https://blueridgelightingandcontrols.com/wp-content/plugins/super-forms/uploads/php/files/32f7544b21715900b4f231c6c44f9006/tesoziwudibutufumit.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_off0000e825.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE825 11076 bytes
SHA-256: c1c93c10c5a401fce235864b8c8a6a516f172725a2523e0b5d33eacc628c66e1
font_01_sfnt_off000101ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101EF 16968 bytes
SHA-256: d2ebec224002aa25dbd575eb419df6ac05652766891ba5382fe04611da3b2389
font_02_sfnt_off00012de2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DE2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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