Malicious PDF — malware analysis report

Static analysis result for SHA-256 063b06be99d38b28…

MALICIOUS

PDF

95.1 KB Created: 2021-07-22 08:33:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ece4917b1e6df95891d1ef845d79cf5e SHA-1: 9a8d0286488a6777816e7861f764866f18488bab SHA-256: 063b06be99d38b28b50def4c153b34906d5fcb67c17da0f33253f468720b8955
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File

The PDF contains a large number of links, many pointing to compromised WordPress sites, indicating a link farm or SEO spamming operation. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution via these links. No scripts were extracted, and the document body was unreadable binary data.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9928

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://freemansphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/160efee47c4ab6---76055799400.pdf
    • https://calmoinc.com/upload/editor/file/39592755328.pdf
    • http://bfr-bialapodlaska.pl/userfiles/file/migorepaxuxexasem.pdf
    • http://www.patricktennis.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609c6df752484---ruwinegado.pdf
    • https://kolodezrus.ru/wp-content/plugins/super-forms/uploads/php/files/29252a327f20264fd9956480291e5fb8/radelusak.pdf
    • https://trichynext.com/wp-content/plugins/super-forms/uploads/php/files/c68843faddda0cd48c0c43c3ce8be30b/rolekodeg.pdf
    • https://amadesafar.ir/basefile/amadesafarir/files/folugavaxenafoso.pdf
    • http://myjacksonfamilyreunion.com/clients/e/e2/e2167ce47089e9b789d53270b7cccc99/File/kasemujawegisosoxufelorad.pdf
    • http://futureinfashion.com/ckfinder/userfiles/files/damixibekifopufolopilow.pdf
    • http://chikatere.com/Upload/files/gufosidudi.pdf
    • https://phoenixknights.co.uk/wp-content/plugins/super-forms/uploads/php/files/e2a3c7705688cf72c37dfea33075a170/zoxumeze.pdf
    • http://evabody.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16083652d5356f---pinuruxes.pdf
    • http://gpn1971.org/clients/a/a2/a25689677492d603657f1241a2a69ea8/File/69603825793.pdf
    • http://jyjwqj.com/uploadfile/file///2021062916492666.pdf
    • https://freedomtampons.com/wp-content/plugins/super-forms/uploads/php/files/c28014b00fd6212060346ccbf4ee7292/10293725832.pdf
    • http://curry-box-deluxe.de/userfiles/file/suwubuwajofaduxo.pdf
    • http://www.benvenutialmare.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e0eecf46662---zudavufi.pdf
    • https://arrayamed.com/userfiles/file/gufuzinezemo.pdf
    • http://pospatrans.cz/UserFiles/File/timamigo.pdf
    • https://inchiriereelicoptere.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16078adc3312d7---mukopidasoxenepaf.pdf
    • http://lubrifianti-auto.ro/files/file/20869541113.pdf
    • http://alphabodysupplements.com/newerac2c/userfiles/file/38639128722.pdf
    • http://maskaevlawyer.ru/userfiles/file/jugebesaxalafogi.pdf
    • https://greenlakepaint.com/ckfinder/userfiles/files/10435409430.pdf
    • https://beachesbrewing.com/wp-content/plugins/super-forms/uploads/php/files/3e5122feef7cfefde923040c4f129e37/91032791992.pdf
    • https://cafesca.org/ckfinder/userfiles/files/ruzodipusuxareloxat.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=outer+space+coloring+pages+for+adults
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010e22.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10E22 16792 bytes
font_01_sfnt_off00012639.bin
c2c1be318fa19c1eadce009a0d1fa64c6e548d55a1c6a1d4764d25757b00997f
pdf-font-stream PDF embedded font (sfnt) at offset 0x12639 10920 bytes
font_02_sfnt_off00013f79.bin
e92c204b6b6c894319b091cf14d01c02e35cac1f9a3365f84f7918f798109c26
pdf-font-stream PDF embedded font (sfnt) at offset 0x13F79 17324 bytes