Malicious PDF — malware analysis report

Static analysis result for SHA-256 2059c909f1800a3b…

MALICIOUS

PDF

86.3 KB Created: 2021-08-04 06:18:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 0e6a9e4a3a26981cea002d1a1b342eee SHA-1: 536c87d757df749db7cd0744cbab8827cc1735aa SHA-256: 2059c909f1800a3b125e92a4eab6a3579d6ab174bd496b8ebbc7e2a2d0aab80a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many pointing to compromised WordPress sites and disposable hosting, suggesting a link farm designed to redirect users. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the nature of the URLs and the heuristic firings point towards a malicious document designed to lure users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

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=secret+guide+dream+league+soccer+2020+apk PDF link annotation
    • https://www.sharpeningfactory.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cce87322c8---62982419148.pdfIn PDF document text
    • https://www.novet.de/wp-content/plugins/formcraft/file-upload/server/content/files/16093a91141348---63606430702.pdfIn PDF document text
    • http://kapelski.pl/userfiles/file/pojalezibivodepa.pdfIn PDF document text
    • http://for-rent-aalst.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cf1fe21919---44851062123.pdfIn PDF document text
    • http://sanraimundo.cl/dyn/uploads/file/gikavodolovezipale.pdfIn PDF document text
    • http://lirealestatelitigator.com/wp-content/plugins/super-forms/uploads/php/files/5670fd39a1d6c7a3e785cf6c75df1daf/legatidumirobivef.pdfIn PDF document text
    • http://bamt.be/wp-content/plugins/formcraft/file-upload/server/content/files/160984488d97c1---jepibikopinu.pdfIn PDF document text
    • http://yuseigachi.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160983e85eb4b7---vadekexuwokujoxut.pdfIn PDF document text
    • http://mebelhotel.ru/images/news/file/57959395855.pdfIn PDF document text
    • https://www.hdontheroadnapoli.it/wp-content/plugins/formcraft/file-upload/server/content/files/1608878178080b---7219799227.pdfIn PDF document text
    • https://wagaskar.com/media/nasarimitonobojore.pdfIn PDF document text
    • http://www.platformliften.info/wp-content/plugins/formcraft/file-upload/server/content/files/16076fc824d1d2---tegavu.pdfIn PDF document text
    • http://busankid.com/webfiles/board/file///wozobebiwosugoripabafi.pdfIn PDF document text
    • http://logistra.fr/ressource/site-image/files/nupedo.pdfIn PDF document text
    • https://vashadvokat82.ru/wp-content/plugins/super-forms/uploads/php/files/2ad5fb17f9c7b313893642f2eb22abfc/56345208633.pdfIn PDF document text
    • http://comicpapyrus.com/wp-content/plugins/super-forms/uploads/php/files/5faf91f853543ab8e59792cc9334a210/51829409860.pdfIn PDF document text
    • http://auto-spec.ca/fck/file/57668527474.pdfIn PDF document text
    • http://ptairsupply.com/userfiles/file/xodafogawusazibavimozo.pdfIn PDF document text
    • https://www.cdscabling.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16091ced649206---15251855157.pdfIn PDF document text
    • http://willtorock.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ce1c6bf9f2---34298818553.pdfIn PDF document text
    • http://taikenplan.jp/ckfinder/userfiles/files/mudorovo.pdfIn PDF document text
    • http://melinterior.ru/userfiles/files/likoviva.pdfIn PDF document text
    • http://www.sevenchurchestour.net/seven/wp-content/plugins/formcraft/file-upload/server/content/files/16078aca38947f---zozagepogiragolajari.pdfIn PDF document text
    • http://bulongvungtau.com/media/ftp/file/24126745403.pdfIn PDF document text
    • https://www.couleurs-et-jardin.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16071387c529bf---69662058290.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000db6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB6D 11264 bytes
SHA-256: 4daa0be99412e32e9bc45e80c5cd5526c40661a34d7b44ad0e397e274359fff7
font_01_sfnt_off0000f5b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5B5 19752 bytes
SHA-256: f8d386a5758c191fda8c64294dfffe9d5a510a57d647746c3e3a6b8bfd737ebf
font_02_sfnt_off0001266f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1266F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off00013e7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E7C 2528 bytes
SHA-256: 596b5442ecefd38aa691706d925e8dbf316c2d4330ff1ffa67292715791e8ded

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