Malicious PDF — malware analysis report

Static analysis result for SHA-256 b62f0114222dcbc4…

MALICIOUS

PDF

102.3 KB Created: 2021-06-29 00:26:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 2e1aefa7e52f6ba7f66c60565fe0eaeb SHA-1: 233e29c7bd5e040c7af2cc6dfc8ff966fc07b92b SHA-256: b62f0114222dcbc4d07d050144b5580b8484ae3a3e69c5440b212765a26626c8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm designed to trick users into downloading more files by masquerading as "tamil astrology pdf books free download". Several heuristics indicate the presence of a link farm on compromised WordPress sites, and ClamAV detected it as Pdf.Phishing.Trojan. The ML classifier also flagged this PDF as malicious with high confidence. No scripts were extracted, but the embedded URLs suggest a phishing or social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9877

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://www.wallisandemmanuel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072030276923---92519105361.pdf In PDF document text
    • http://parkhigh65.com/clients/4970/File/23851075459.pdfIn PDF document text
    • https://mithermomix.com.mx/wp-content/plugins/super-forms/uploads/php/files/f58b7efae1849226ba48af26932d1a03/kuwurijamibezimexelove.pdfIn PDF document text
    • https://leesman.com/wp-content/plugins/super-forms/uploads/php/files/e0c0c4793ba5e4c3f805c8d3462861c3/pofijalutuzigudifijizogu.pdfIn PDF document text
    • https://www.hotel-palladium.gr/wp-content/plugins/super-forms/uploads/php/files/lc3chhj2efurecfncfadhhgv4j/76829967576.pdfIn PDF document text
    • http://queuemanagementsystems.com/wp-content/plugins/formcraft/file-upload/server/content/files/160892950ebd49---59024698946.pdfIn PDF document text
    • https://advancedbusiness.co/wp-content/plugins/super-forms/uploads/php/files/be0c0646cda4da857f17a316777d4e66/demiwibo.pdfIn PDF document text
    • http://remontnoedelo.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a4fa7bd382a---22739620853.pdfIn PDF document text
    • http://shs1977reunion.com/clients/41590/File/suwuze.pdfIn PDF document text
    • https://cspdental.com/wp-content/plugins/super-forms/uploads/php/files/8e4a44dd6bd536bb8218d6baef9ab6c4/82852583510.pdfIn PDF document text
    • http://alexhofford.com/temp/files/file/60296227808.pdfIn PDF document text
    • https://hopefor.today/wp-content/plugins/super-forms/uploads/php/files/cd1a76474e1768324beac0dc2c90335f/nujilulijixomebojiro.pdfIn PDF document text
    • https://solarconsulting.org/wp-content/plugins/super-forms/uploads/php/files/c3d757a69a0a78bbb23583c4534d0693/selukimusimulepikawe.pdfIn PDF document text
    • http://interreg-ipa-husrb.com/downloads/daniludeg.pdfIn PDF document text
    • https://wavesmaroochydore.com/wp-content/plugins/super-forms/uploads/php/files/1fvkvqoiukos18q9bveprg0c2v/xupebet.pdfIn PDF document text
    • https://inchirieriavioane.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1607233dd5f4b3---vovilejuniwediperi.pdfIn PDF document text
    • https://rclurie.com/wp-content/plugins/super-forms/uploads/php/files/80f6afdfabf4de8ae0d9c69819eafd1e/7434477801.pdfIn PDF document text
    • http://brainbond.ro/userfiles/file/wefimoselezepud.pdfIn PDF document text
    • https://diversifiedhumansolutions.com/wp-content/plugins/super-forms/uploads/php/files/d237bca1130e0ddfdad3c8c5f52525fa/3128183284.pdfIn PDF document text
    • http://ecohost.ru/pics/images/file/36199688050.pdfIn PDF document text
    • https://amatnieks.lv/pictures/image/xanulemutisiweket.pdfIn PDF document text
    • http://zamokugrofa.sk/admin/fckeditor/file/3796127829.pdfIn PDF document text
    • https://maidintown.co.uk/wp-content/plugins/super-forms/uploads/php/files/bd75436424af4a3eb6665ad27cfdd354/nozimexirugudezegewox.pdfIn PDF document text
    • http://objetivovender.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9e9efc5dd2---mafepifiredekojit.pdfIn PDF document text
    • http://inlikeflintlogistics.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094b3d955464---kuzubuvib.pdfIn PDF document text
    • https://khonggiansachhanoi.vn/uploads/files/sopizenumi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=tamil+astrology+pdf+books+free+downloadPDF 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_off00012e99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E99 16440 bytes
SHA-256: 56e6d421d0895fa6cd3cde938aa6a316f047e2552eb1c19bcec049e103eb4f2a
font_01_sfnt_off0001590b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1590B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00017122.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17122 11236 bytes
SHA-256: 90b9ea403809cb61a105d84a5c0aba7bcde3803c7e3b9295bfc64f5db2a1bfef