Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc94824bf75ff84b…

MALICIOUS

PDF

95.4 KB Created: 2021-06-30 23:35:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 52d0b80c107148b184cb18da8bea7544 SHA-1: f525c31674c09aa4e67a777228d826467570d69b SHA-256: fc94824bf75ff84b4370077a1bccee8d859f86c71fb1b5396d29541fa4aa7699
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains numerous embedded URLs that point to compromised WordPress sites and disposable domains, indicating a link farm designed to lure users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a common malicious PDF tactic.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9935

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=ppt+and+pdf+full+form
    • http://midiabyz.com/wp-content/plugins/super-forms/uploads/php/files/93720ca3b3dcbb33200ddaf470b3d6cf/57299286115.pdf
    • http://antwerp-rentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a69714144f---gosifadatadimawaxosutiper.pdf
    • https://www.mnspineandsport.com/wp-content/plugins/super-forms/uploads/php/files/9fa9c05212f9973474aa982488923efa/37393649265.pdf
    • https://vashadvokat82.ru/wp-content/plugins/super-forms/uploads/php/files/8a4428190e7dfad66a17454451dcc37b/ruwisujebiduno.pdf
    • https://confetti-seasons.ru/upload/files/nezonuroji.pdf
    • https://liniagdanskzydowo.pl/files/potinepogu.pdf
    • http://vincityhomes.vn/wp-content/plugins/super-forms/uploads/php/files/7mndro9mplmsmouufocmtukg4i/80119801917.pdf
    • https://ecoretras.com/file/74609152716.pdf
    • https://area34.info/wp-content/plugins/super-forms/uploads/php/files/vq1u6t1tvg7nnujuqtscsiamt5/wifaviduzotekoxuwakeruga.pdf
    • http://www.kindytennis.com/wp-content/plugins/formcraft/file-upload/server/content/files/160714c12cb638---48961995540.pdf
    • http://amandatravel.com/userfiles/file/59219101259.pdf
    • http://comicpapyrus.com/wp-content/plugins/super-forms/uploads/php/files/e8efb71d57cf99d66e79e923e804efad/74410667229.pdf
    • https://popcouncilinstitute.org/wp-content/plugins/super-forms/uploads/php/files/89fc693f5526219579ccc8ba081da182/lekefumunupilaporajaned.pdf
    • http://sorokolaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/85496205861.pdf
    • http://plenar.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1607c98993f9f4---tijav.pdf
    • http://biotop-zamosc.pl/userfiles/file/xagoguvenajoneje.pdf
    • https://burlingame.com/wysiwygfiles/file/viloze.pdf
    • https://jfefood.com/wp-content/plugins/super-forms/uploads/php/files/bacfe6476bedc31c7a97d6a6c114f632/zidefirolosagoxagesix.pdf
    • https://www.arphplumbing.co.uk/wp-content/plugins/super-forms/uploads/php/files/q47o392b0jmi4237kjo4pj8nf5/89464930729.pdf
    • https://abugfreemind.com/userfiles/file/zebopurem.pdf
    • https://italvaping.com/file/molonodexexenomezesijamu.pdf
    • https://izharfoster.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ceafb07cd2b---50127025822.pdf
    • https://www.thecandystoresudbury.com/wp-content/plugins/super-forms/uploads/php/files/a8i900sl3dkoflfi95hck951lk/21222010164.pdf
    • https://lea-inc.com/wp-content/plugins/super-forms/uploads/php/files/d1695a56a47f98c4f9317b8dd57d0653/fukojirijonokazov.pdf
    • 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_off00011257.bin
07400d95df0220e0520997a370c0f9cc84c55c3918c2bade985f7ea2c92224e4
pdf-font-stream PDF embedded font (sfnt) at offset 0x11257 17876 bytes
font_01_sfnt_off000140fc.bin
8e9bf20ecabbc53979f31efedcb184fa993f0b6962d1f6d2e5fa6375c6da0dd8
pdf-font-stream PDF embedded font (sfnt) at offset 0x140FC 10368 bytes
font_02_sfnt_off00015860.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x15860 16792 bytes