Malicious PDF — malware analysis report

Static analysis result for SHA-256 00815ec7283a82bf…

MALICIOUS

PDF

85.8 KB Created: 2021-10-05 05:46:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 0b51a096b110f23b8e5904647995059f SHA-1: 6e0723385a4c107eace65ff4a2744fa2f0881771 SHA-256: 00815ec7283a82bf4e53633d5a940000db120f21804f87468f0bf37f544e91e2
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is often used to exploit vulnerabilities or redirect users to malicious sites. The presence of numerous external URIs, many pointing to compromised CMS uploads and disposable hosting, strongly suggests a phishing or malware distribution attempt. The ClamAV detection and ML classifier further support the malicious nature of this file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://irlanc.ru/uplcv?utm_term=how+to+add+funny+effects+on+imovie PDF link annotation
    • https://parisautotravel.com/wp-content/plugins/super-forms/uploads/php/files/db422vgt90rbcbotu6fc8fu297/18578199929.pdfIn PDF document text
    • http://ehomeforeclosure.org/images/file/11080591207.pdfIn PDF document text
    • https://hantverkarenisandby.se/UserFiles/files/45889312132.pdfIn PDF document text
    • http://www.kinoimaging.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1614f30a4b9c2e---99405098855.pdfIn PDF document text
    • http://hingliltd.com/userfiles/tofivaminesuzen.pdfIn PDF document text
    • http://akademia-jedenastka.pl/zdjecia/fck/file/30578109923.pdfIn PDF document text
    • http://cu-mbc.com/ckfinder/userfiles/files/34079257152.pdfIn PDF document text
    • https://magerp.org/upload/files/vobawanodenoladurer.pdfIn PDF document text
    • https://mandarinusa.com/userfiles/file/1632229742.pdfIn PDF document text
    • http://www.meglobalinc.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16153e6eac019a---gosunowazu.pdfIn PDF document text
    • https://vildmarksjagt.dk/userfiles/file/jitojupadugedosar.pdfIn PDF document text
    • https://coebmsf.com/userfiles/file/vemugexudo.pdfIn PDF document text
    • https://corumosmanlimakina.com/js/ckfinder/userfiles/files/92654639344.pdfIn PDF document text
    • http://xn--e1aaafipco3bk8gra3b.xn--p1ai/upload_picture/file/73229400506.pdfIn PDF document text
    • https://www.totspotdaynursery.co.uk/ckfinder/userfiles/files/46116586514.pdfIn PDF document text
    • http://www.gamylai.vn/uploads/files/famabu.pdfIn PDF document text
    • http://dream-mebel.com/pic/file/lisido.pdfIn PDF document text
    • https://certifiedmoversinc.com/wp-content/plugins/super-forms/uploads/php/files/72db22a9e05d47dfc66b37e5807d97fa/fevupixesixubawe.pdfIn PDF document text
    • https://oknoplus-omsk.ru/wp-content/plugins/super-forms/uploads/php/files/035ef8057da80b9c97b0c268e1e393ba/gozanulobaputajuza.pdfIn PDF document text
    • http://srmtteaparty.com/uploads/files/202109021152359440.pdfIn PDF document text
    • https://mytutr.com/wp-content/plugins/super-forms/uploads/php/files/87b53d839046d980f3e6d1e05795fa30/zoliwaxafukabosivulorolo.pdfIn PDF document text
    • https://www.peltonfell.org.uk/ckfinder/userfiles/files/11056188517.pdfIn PDF document text
    • http://www.holzbau-hoelzl.at/wp-content/plugins/formcraft/file-upload/server/content/files/1615207c237a65---tejudoremosekevupuji.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_off0000eb80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB80 10848 bytes
SHA-256: 1c01f799b9b8c3a668b15c0d9734042ee6e0aa9734735b7d31eb1b9a6c3dd1a3
font_01_sfnt_off0001049a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1049A 17536 bytes
SHA-256: f6164ee3f6150292df9eb166a2f39f04dc2d5931fcdc7f176971207b7e6a9c40
font_02_sfnt_off00013155.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13155 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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