Malicious PDF — malware analysis report

Static analysis result for SHA-256 84556bdad15f3d05…

MALICIOUS

PDF

74.5 KB Created: 2021-09-05 23:52:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 2927a27ecb412137df594e2c9fe562ec SHA-1: 3a10fc69d073bd840a909c339d0d1789b701da29 SHA-256: 84556bdad15f3d05c44dde3bab8e34a8ecea17873a4ed8f9a8a9cbb9bdcc394f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external links, many pointing to compromised WordPress sites, suggesting it functions as a link farm or redirection mechanism. The embedded URLs are likely used to direct users to phishing pages or download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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://medvor.ru/uplcv?utm_term=andhra+pradesh+government+holidays+list+2018+pdf PDF link annotation
    • http://consulcongress.it/uploads/assets/file/mubek.pdfIn PDF document text
    • http://xn--zb0bw3kv4s8mn.com/upload/fckeditor/file/vunezorowovamagi.pdfIn PDF document text
    • https://whiteelephant.co.in/wp-content/plugins/super-forms/uploads/php/files/06927280fe8823f3b4380f9f602a9aa6/silijesogifaju.pdfIn PDF document text
    • http://sunnysolutions.it/uploads/assets/file/93130105898.pdfIn PDF document text
    • http://mountmedpharmacy.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160fdfd1527e3d---tomusazipukig.pdfIn PDF document text
    • https://veglifekc.org/wp-content/plugins/super-forms/uploads/php/files//36430291011.pdfIn PDF document text
    • https://sweetestspaparty.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ef432a37d0---riripezaxunes.pdfIn PDF document text
    • https://directorvincentchow.com/fck_filemanager_upload/file/16711845440.pdfIn PDF document text
    • http://diclenakliyat.com/userfiles/file/kowavelazijolujowezoze.pdfIn PDF document text
    • https://dimensioninteractive.com/WYSIWYGImage/file/joziriwetosobejuvovidana.pdfIn PDF document text
    • https://absoluteanytime.com/media_file/files/files/zakiziwex.pdfIn PDF document text
    • http://gostinica-domodedovo.ru/files/tovuzar.pdfIn PDF document text
    • https://georgiamusicpartners.org/wp-content/plugins/super-forms/uploads/php/files/ce38648dcfca6f10f1958c62ac56f11c/36605728484.pdfIn PDF document text
    • https://www.energetisch-therapeut-estie.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a2f155c378d---leruxigilifubaga.pdfIn PDF document text
    • http://epmresearch.org/userfiles/files/74164922266.pdfIn PDF document text
    • http://colorfulmedia.de/fotki/fotki/file/junuweg.pdfIn PDF document text
    • https://tocgia247.com/wp-content/plugins/super-forms/uploads/php/files/pgre7fhpicgv2389upjtv7g4dc/durevomuxesur.pdfIn PDF document text
    • http://romanakladatelstvi.cz/userfiles/file/tenejerufonemaxilaxafi.pdfIn PDF document text
    • https://samtee.com/admin/images/file/bomamijexuvikuga.pdfIn PDF document text
    • http://halvani.com/wp-content/plugins/formcraft/file-upload/server/content/files/160af95e138816---zademo.pdfIn PDF document text
    • https://arerp.kr/data/file///85279403778.pdfIn PDF document text
    • https://art-lamps-rali.eu/files/file/gaxelanixadag.pdfIn PDF document text
    • https://www.eziblank.com/wp-content/plugins/super-forms/uploads/php/files/0780a60d3ef18e1cedd2d65d80872ec8/73025850328.pdfIn PDF document text
    • http://davidhammerstein.org/userfiles/file/sobubufusenokiminif.pdfIn PDF document text
    • https://eandjfamilyhealthcenter.com/wp-content/plugins/super-forms/uploads/php/files/b99bb903956d91a2e4766125ef355907/61659666993.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_off0000bcc1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBCC1 11608 bytes
SHA-256: baa49edb33acac38a1adc56c9013075c0a065aa861346807afdc696e9d88b240
font_01_sfnt_off0000d80e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD80E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f020.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF020 16932 bytes
SHA-256: b51103f163c09311deb94d755bc458849235b8c9fe1e0035e6c7b1af0f1227fa

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