Malicious PDF — malware analysis report

Static analysis result for SHA-256 0eedc02bb9bef88b…

MALICIOUS

PDF

90.0 KB Created: 2021-09-05 21:49:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: eb1e4359f1d619deeca247cd654c465e SHA-1: e1df77cc38379643afb825a6b242efb558697aa9 SHA-256: 0eedc02bb9bef88bafcc9e37f2f1d726b030c0fa8e9d717bf26278650aa183c5
156 Risk Score

Malware Insights

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

The PDF was flagged by ML and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, directing users to multiple compromised WordPress sites and disposable hosting domains. The embedded URLs, despite some being marked benign, contribute to the overall malicious intent of redirecting users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://ozhelalikram.de/resimler/files/4191921874.pdf In PDF document text
    • https://jnfarley.com/wp-content/plugins/super-forms/uploads/php/files/9c24nj6hrv983tmnghlfmi8jb6/pedepudunod.pdfIn PDF document text
    • http://www.jcca.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/16132ab7a0e451---luxalibosipuzide.pdfIn PDF document text
    • https://glearningsolutions.com/userfiles/files/wosugedefinagitopufako.pdfIn PDF document text
    • https://www.rowtheerne.com/wp-content/plugins/super-forms/uploads/php/files/1cca5863ef5766721c7f0c6bef7464cf/gevopiru.pdfIn PDF document text
    • http://sciencevier.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bbe6fc3c5a5---fifalobasu.pdfIn PDF document text
    • https://omprintandpack.com/userfiles/file/pifovikebuwive.pdfIn PDF document text
    • https://yarsan.ru/wp-content/plugins/super-forms/uploads/php/files/60bac0e18e666fadd419419eba221bc8/roxinowoti.pdfIn PDF document text
    • http://acetuitioncentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160bdc076b411a---marolef.pdfIn PDF document text
    • https://nicemexico.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607f09f3e898d---2690100003.pdfIn PDF document text
    • http://alumcity.ru/userfiles/file/88231737816.pdfIn PDF document text
    • http://securitydirect.it/wp-content/plugins/super-forms/uploads/php/files/1235b447fa1c6d4072dd6fd0c98469ea/jasixavunanasunev.pdfIn PDF document text
    • http://opalsolar.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608357352862d---nimoduvoxuwuzedub.pdfIn PDF document text
    • https://www.rath-catering.de/wp-content/plugins/formcraft/file-upload/server/content/files/160f5d13076b21---sunejidekij.pdfIn PDF document text
    • https://comesa.com.pe/wp-content/plugins/super-forms/uploads/php/files/vu8p55ouqkg6rfpbcjg3l02sm6/36234183899.pdfIn PDF document text
    • https://asi-filter.pl/files/file/pegusokipuwim.pdfIn PDF document text
    • http://kamnitikamini.si/upload/files/pajofezawogufizuko.pdfIn PDF document text
    • http://www.molinoag.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081ac2f8a7f7---46576131919.pdfIn PDF document text
    • http://ahkjt.com/upfile/file/gogusiwetozimom.pdfIn PDF document text
    • http://maility.pl/_ADRESuserfiles/file/30414122604.pdfIn PDF document text
    • http://tunglamgarden.com/images/fck/file/lalanezufa.pdfIn PDF document text
    • http://nowator-zpu.pl/userfiles/file/rivasusijom.pdfIn PDF document text
    • https://skyfireconsulting.com/wp-content/plugins/super-forms/uploads/php/files/vitievmcga1a13p35dbfb89bsr/rezojagubiwopejodin.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=daily+routine+esl+worksheetPDF link annotation
    • 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_off0000fa64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA64 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001127b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1127B 10596 bytes
SHA-256: 9c426cb34c2f766374b9ed1bd085c17e262318e9046fe61b363dc5a9282c300e
font_02_sfnt_off00012ab4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12AB4 18444 bytes
SHA-256: e6ad84a3f0a36dbed28087c024f97c372933a7d7e12cbc6d6b1da92f662bbaa8

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