Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e47733fe35bb908…

MALICIOUS

PDF

108.3 KB Created: 2021-07-04 22:48:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 03534f68272aa05f3932b35582eb675d SHA-1: 665df42e7b78d8877c004ccc7057bc894bcf98d5 SHA-256: 6e47733fe35bb9081ce16d70688cf1212dd25742472e12fb99235514524fe335
156 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains a link farm pointing to multiple compromised WordPress sites, suggesting an attempt to redirect users to malicious content. The presence of numerous PDF link farm heuristics indicates a deliberate effort to obscure the final destination and potentially distribute malware or conduct phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9921

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://stakeoutllc.com/wp-content/plugins/super-forms/uploads/php/files/226092b9fe143617f15c76aa9409e90f/92808442227.pdf
    • http://www.zav-mito.si/wp-content/plugins/formcraft/file-upload/server/content/files/1608ade490e2af---kuxutedazixigupejel.pdf
    • http://www.meditt.com/wp-content/plugins/super-forms/uploads/php/files/esadq42h0a18omm08i8od2lqq2/forosota.pdf
    • https://endoaccessories.com/wp-content/plugins/super-forms/uploads/php/files/o8vlc6ferca708os6caqdb7kur/35001115184.pdf
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/lbnnuvarqh53u8ftkembnbdf54/55039351379.pdf
    • https://moolans.com/uploads/files/gevipo.pdf
    • http://steclotildehorton.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607e055d3e2c7---60816782784.pdf
    • http://wypelnienia.kratex.pl/wp-content/plugins/super-forms/uploads/php/files/653c4df538310c793f0fd6eae62feede/xewomijasotitirekiwegi.pdf
    • https://martybermanassociates.com/wp-content/plugins/super-forms/uploads/php/files/4159e0ffe911891d3ec8ea028d7f7f3e/sikegok.pdf
    • https://techson-cctv.com/upload/file/zigobopugufozodanafe.pdf
    • http://studiocalderini.it/userfiles/files/41343904221.pdf
    • http://adanateknikservis.web.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1607b2eeec43dc---45459837319.pdf
    • http://titusrelay.com/clients/e/ef/ef304ccc03541e9e6382bef5f13b0a7d/File/50018388677.pdf
    • https://laneopx.com/wp-content/plugins/formcraft/file-upload/server/content/files/160944daf512c2---tolivonetonopin.pdf
    • http://festivaldeliteraturadepereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077a0abafb89---makowafatobup.pdf
    • http://kapelski.pl/userfiles/file/zivov.pdf
    • https://jgmurphy.com/wp-content/plugins/super-forms/uploads/php/files/2b922bfa1a44e5c740fa36235e951a9d/pupot.pdf
    • http://www.goataxiservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160720ef175c91---nekenumuku.pdf
    • http://animalscipublisher.com/files/upfiles/file/73597394041.pdf
    • http://yesilderecine.com/admin/editor_resim/file/zorapidiwaminimujasotawo.pdf
    • https://elitstroycraft.ru/source/file/lujudajamowamazekofukijub.pdf
    • http://payassistinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d554456f3a---48940370608.pdf
    • http://brandnewgoods.net/userfiles/file/22287313402.pdf
    • http://daiichilogistics.com/uploads/news_file/pakalojovofoluzoloz.pdf
    • https://gmonlinestore.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608da13fc65fc---56648027066.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=health+benefits+of+black+seed+and+honey
    • 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_off00014592.bin
9f2724b4ae49f0459024146aa972ca21bc6c627460170957b60ce31536ec08e5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14592 17272 bytes
font_01_sfnt_off000172d9.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x172D9 16792 bytes
font_02_sfnt_off00018af0.bin
ac0542394ed64a6a7fb95139b2b5b4220d631306ab77686145616fca7f64a48f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x18AF0 10812 bytes

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