Malicious PDF — malware analysis report

Static analysis result for SHA-256 fbfad217f63ef6fd…

MALICIOUS

PDF

84.9 KB Created: 2021-09-14 21:06:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: def43333df12213f369017b08fe93b11 SHA-1: 7ff6ccc306c23059f26a1f407caee79b68c52ebb SHA-256: fbfad217f63ef6fdf96055db76eb262771453c848409f9d182e2986f07e52a36
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links, many pointing to other PDF files hosted on potentially compromised websites or disposable domains, indicating a link farm or distribution mechanism. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a campaign to lure users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

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 http://agilesolutions.in/uploads/9847921761.pdf In PDF document text
    • https://dbmotorbrokers.com/userfiles/file/7922950458.pdfIn PDF document text
    • https://crbz.ru/userfiles/file/68409243952.pdfIn PDF document text
    • https://pokereshop.cz/data/file/91307767768.pdfIn PDF document text
    • http://moveworldtogether.com/datas/files/49214161203.pdfIn PDF document text
    • https://badeluxe.com/userfiles/files/13624125588.pdfIn PDF document text
    • https://www.hdcorp.com.br/wp-content/plugins/super-forms/uploads/php/files/6m3re8n6l6s5i2ic8hri723lc3/45366703844.pdfIn PDF document text
    • http://kuppersbusch.hu/userfiles/files/gigumexuzijubuwewolo.pdfIn PDF document text
    • https://malimbe.africa/wp-content/plugins/super-forms/uploads/php/files/6184781731f1a32d8f63581954ed2658/70900736866.pdfIn PDF document text
    • http://theprojectmanagement.guru/cote_dor_import/admin/ckfinder/userfiles/files/87903266626.pdfIn PDF document text
    • https://bepxuyenviet.com/upload/files/filil.pdfIn PDF document text
    • http://elitacasa.it/images/file/pibemawamojegoxutugere.pdfIn PDF document text
    • https://gz-topstar.com/wp-content/plugins/super-forms/uploads/php/files/d1c91d541457515289dd4dce736439b7/25809055858.pdfIn PDF document text
    • http://2sisaccount.com/userfiles/files/sajifinupizepifo.pdfIn PDF document text
    • http://www.veronicaneal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/16136712460516---vuminemelaz.pdfIn PDF document text
    • http://feuerwehrobrigheim.de/upload/files/runokonutaviwiketoduvope.pdfIn PDF document text
    • https://fermuar.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133b13901a90---42548970407.pdfIn PDF document text
    • http://www.egavilanes.com/ckfinder/userfiles/files/vaguwapemuwoxuxigobipawa.pdfIn PDF document text
    • https://icicle-mountaineering.ltd.uk/ckfinder/userfiles/files/bopukojuneremomad.pdfIn PDF document text
    • http://www.thebetterinsurance.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613154dd9372f---janilogodaxapiguvam.pdfIn PDF document text
    • https://www.chortho.co.uk/wp-content/plugins/super-forms/uploads/php/files/her739k0eb9k2f7v7jt8qf2pbi/11882267782.pdfIn PDF document text
    • https://inijariku.com/ckfinder/userfiles/files/18226547200.pdfIn PDF document text
    • https://toskov-yordanov.com/userfiles/file/99102747836.pdfIn PDF document text
    • http://lingeriedediva.com/UploadFile/file/2021090503135973499.pdfIn PDF document text
    • http://sieuthicayxanh.vn/webroot/img/files/lonoboririfejoviporow.pdfIn PDF document text
    • http://usefchina.com/uploadfile/file///2021090717001286.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=my+talking+tom+2+mod+apk+hack+unlimited+money+and+diamondsPDF link annotation
    • 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_off0000e351.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE351 18236 bytes
SHA-256: 390dbacc299af6bad5b2747b7b401453a1862e806fb4165b086cf58ace909332
font_01_sfnt_off000112d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112D9 11280 bytes
SHA-256: 1c4bf77eb8f73f9410ca04469ffcaa02e370efad360b8f3d8b0c4fe205a55a2e
font_02_sfnt_off00012d01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D01 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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