Malicious PDF — malware analysis report

Static analysis result for SHA-256 74e2b620aaabc0d5…

MALICIOUS

PDF

87.9 KB Created: 2021-06-26 04:16:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: 08c171ea3f029549d3508bf68125462d SHA-1: f020f0b824e6930bf92d3b7fbab6ffb34f50afca SHA-256: 74e2b620aaabc0d5a1bca4a17d3cbf52db528da47c9c500ae3adc8d3bddd74a4
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external links, many pointing to compromised WordPress sites, suggesting a link farm designed to redirect users to malicious content or phishing pages. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document, possibly delivered via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://garglob.ru/uplcv?utm_term=encountering+jesus+in+the+new+testament+crossword+puzzle+answers PDF link annotation
    • https://faresaldabbous.com/uploads/files/42286243192.pdfIn PDF document text
    • https://ecef-groupe.com/wp-content/plugins/super-forms/uploads/php/files/be0spu4kp02qude29vk0qabt60/55952849252.pdfIn PDF document text
    • http://www.kinoimaging.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c357eeb408c---61791897875.pdfIn PDF document text
    • http://careerhack.net/wp-content/plugins/formcraft/file-upload/server/content/files/1606c97d8dc8f6---68038335573.pdfIn PDF document text
    • http://kapelski.pl/userfiles/file/52567872251.pdfIn PDF document text
    • https://primeodontorj.com/wp-content/plugins/super-forms/uploads/php/files/5a8bf453741ffa7099a3a38bfba3e43f/nasiwogulajufesobeki.pdfIn PDF document text
    • http://bollywoodsalonskokie.com/admin/images/file/wuzafatakofe.pdfIn PDF document text
    • http://in-dapt.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f4e68a284a---muxedob.pdfIn PDF document text
    • http://foto-klub.dk/userfiles/file/megosekos.pdfIn PDF document text
    • http://fine-cottage.ru/userfiles/files/faxekedekudewatumaxenax.pdfIn PDF document text
    • https://atolab.it/wp-content/plugins/super-forms/uploads/php/files/736467c3cdb44cbaa4eeb45dac428265/21510827512.pdfIn PDF document text
    • http://trainternational.in/wp-content/plugins/formcraft/file-upload/server/content/files/1606c8feea583e---82840401207.pdfIn PDF document text
    • https://aadhaarretail.com/administrator/imagetemp/file/sirubi.pdfIn PDF document text
    • https://dcoderesearch.com/uploads/maramenigekedusiveroz.pdfIn PDF document text
    • https://simovi.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160a0f8f52dbca---340159132.pdfIn PDF document text
    • http://www.telsercom.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608df3041a39f---fizunurovof.pdfIn PDF document text
    • http://www.k-24.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cf6afe88f85---kipuboliwataze.pdfIn PDF document text
    • http://cherriestattoo.com/ckfinder/userfiles/files/25380920855.pdfIn PDF document text
    • http://loveperfectionschool.com/upload/file/kovapapawopoxes.pdfIn PDF document text
    • http://ednak.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e305332b73---fipasizuzemepadawezu.pdfIn PDF document text
    • http://kapli74.ru/upload_picture/niwosepoketebu.pdfIn PDF document text
    • http://indecomavo.pl/inc/92926488031.pdfIn PDF document text
    • http://goldenpeak.it/userfiles/files/47506749544.pdfIn PDF document text
    • http://triumphtoday.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a71679cfc6c---32723978814.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_off0000f27a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF27A 11320 bytes
SHA-256: df71f88d7231f09698aa319a7a94fa4423a199f5aef9ffbdbcf5437a331680ec
font_01_sfnt_off00010cbc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CBC 17204 bytes
SHA-256: 6477ca94c7f666caa447d6839ee5b5ab14760417f40703deaeee593e6ecba8e4
font_02_sfnt_off0001399d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1399D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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