Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e41419cd13d7b53…

MALICIOUS

PDF

86.4 KB Created: 2021-09-01 05:58:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 9e1fac7de9fb992cfb1d8ee18bb3e5c6 SHA-1: 9164e07d6f238b2ac1b9081fb7e681ed1cf3584f SHA-256: 0e41419cd13d7b5350946983f71008711f66bc5a8446d5844b2d5a585579de75
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains a link farm with numerous URLs pointing to various domains, many of which appear to be compromised CMS uploads. The presence of these links suggests an attempt to lure users to external sites, likely for credential harvesting or further malware delivery. No scripts were extracted, but the PDF structure and URL patterns are indicative of a phishing or redirection campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://philabc.ru/uplcv?utm_term=toni+morrison+playing+in+the+dark+whiteness+and+the+literary+imagination PDF link annotation
    • http://pokrowce-ochronne.pl/Upload/file/zopos.pdfIn PDF document text
    • https://proff-doors.ru/wp-content/plugins/super-forms/uploads/php/files/108baa1146e12e2a625f9391ec47eae3/mugofovabiwigivovawodefo.pdfIn PDF document text
    • http://wagnerpc.com/userfiles/files/patukiw.pdfIn PDF document text
    • https://medok18.ru/wp-content/plugins/super-forms/uploads/php/files/6cd1a5ccac8077bfc08fd0b6f3501303/6677178062.pdfIn PDF document text
    • http://sbhs1967.com/clients/8/89/8985ce50e7417da620f75e2af787291b/File/severupaxe.pdfIn PDF document text
    • http://doktor-okonski.pl/uploadimg/file/vemun.pdfIn PDF document text
    • https://toliveinchristjesus.ceosale.catholic.edu.au/application/third_party/ckfinder/userfiles/files/kaboxosavexejegebafanoko.pdfIn PDF document text
    • http://andreagarciam.com/wp-content/plugins/formcraft/file-upload/server/content/files/160792bf51ced8---75253287145.pdfIn PDF document text
    • https://air-separation-supplier.com/d/files/xedipojanawizefuxuf.pdfIn PDF document text
    • http://shlawllc.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/19649453929.pdfIn PDF document text
    • http://flirtproducties.nl/ckfinder/userfiles/files/60078809483.pdfIn PDF document text
    • http://ateliergermain.net/sites/default/files/file/20167510181.pdfIn PDF document text
    • http://alltechsro.cz/files/jewubijixo.pdfIn PDF document text
    • http://thm-holding.ru/wp-content/plugins/super-forms/uploads/php/files/ce79cf52d35febc6c3adfcc26ad3ff3c/20717807972.pdfIn PDF document text
    • https://mlmrockstars.com/ckfinder/userfiles/files/10743079973.pdfIn PDF document text
    • http://jiin-torng.com/uploadfiles/20210707130536.pdfIn PDF document text
    • https://amitadevnani.com/userfiles/file/befazilekixe.pdfIn PDF document text
    • http://open.ua/uploads/ckeditor/files/59202402181.pdfIn PDF document text
    • http://kperrylaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/79859024701.pdfIn PDF document text
    • http://theprintfactoryvietnam.com/uploads/files/23469565707.pdfIn PDF document text
    • https://aguiapromocional.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608a5376be5b8---zorakaka.pdfIn PDF document text
    • https://fieldofgreen.com/wp-content/plugins/super-forms/uploads/php/files/b6d8c33cf05c6176f26d60b05c6f7d80/zutiloxutibudarudowov.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_off0000e7bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7BB 18560 bytes
SHA-256: ce18617f6df28b3be12220b6267e618f696abd7c77c543280ddc8a1655f222d1
font_01_sfnt_off00011741.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11741 11096 bytes
SHA-256: 00b7942d65d5d206e8e8696b42f54583f771cd9a5977d70b5a873eada04b4061
font_02_sfnt_off000130d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x130D6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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