Malicious PDF — malware analysis report

Static analysis result for SHA-256 e35fe0d5e1493575…

MALICIOUS

PDF

83.8 KB Created: 2021-06-30 17:35:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 6e70e644e81833bbd7def5947e98037a SHA-1: 316575c0d28ec31d03de7cabfca2251825c6d25a SHA-256: e35fe0d5e1493575874d0684fce6f4d0d3376665353dff38c1e176ea62586d6b
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan payload. It contains numerous links to compromised WordPress sites, suggesting an attempt to host or distribute malicious content. The presence of a 'download button' lure further supports a phishing or social engineering attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://archism.ru/uplcv?utm_term=get+out+1080p+torrent PDF link annotation
    • https://www.peeryhotel.com/wp-content/plugins/super-forms/uploads/php/files/c7eece6b6bd5ff7307206f844852e8bd/kuvaligudux.pdfIn PDF document text
    • http://www.grupohk.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609d3cd3f2825---kabatazimupazowenunixavoj.pdfIn PDF document text
    • http://pck.malopolska.pl/wp-content/plugins/super-forms/uploads/php/files/08fe00cda415d55ab553eb2898038371/kimagogiwubelofumutaji.pdfIn PDF document text
    • http://atlantichomeportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b42dd296dcb---13614452214.pdfIn PDF document text
    • http://www.viksexteriors.com/wp-content/plugins/formcraft/file-upload/server/content/files/160985ee3d0534---xelemavesesowawid.pdfIn PDF document text
    • https://xn----8sbaavnccwq4am.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/1b9bb0dff88a495e21c1ea96d0dfec0a/43816465080.pdfIn PDF document text
    • https://www.kngroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8329c009da---33615385176.pdfIn PDF document text
    • https://erinmillssmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/tn6gk5j7ngn6v522asakeps6c7/masusavarexiwezarefosewe.pdfIn PDF document text
    • https://xn--80adj7cxa.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/0950d6a5dcf4210b06423355552988d3/48516026983.pdfIn PDF document text
    • http://kfbi.ru/content/file/muzanagutawukuxigu.pdfIn PDF document text
    • https://stpetejazz.com/wp-content/plugins/super-forms/uploads/php/files/fvgsv0uvu3t65mpvmqukene43d/18743113005.pdfIn PDF document text
    • http://www.siscard.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a61179b6e5a---jemusuwenegi.pdfIn PDF document text
    • https://nicemexico.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a3a8cf8adb1---mubox.pdfIn PDF document text
    • https://robinio.de/wp-content/plugins/super-forms/uploads/php/files/p0ttfostct7iigsittgibmguv4/60831181365.pdfIn PDF document text
    • https://higher-reason.com/wp-content/plugins/super-forms/uploads/php/files/vlhhf7d0r90t9o2fbdv9j5bsb0/99432614061.pdfIn PDF document text
    • https://readxyz.org/wp-content/plugins/super-forms/uploads/php/files/3e21753b9f3fbab70a06907612f3dffb/kediwelox.pdfIn PDF document text
    • https://amadesafar.ir/basefile/amadesafarir/files/80851145113.pdfIn PDF document text
    • http://gld-lining.com/user_img/files/60133504548.pdfIn PDF document text
    • http://hengtaixin.com/HangShun/ckfinder/userfiles/files/vexanenakerifufixapigu.pdfIn PDF document text
    • http://incoyun.com/calisma2/files/uploads/ronekinowov.pdfIn PDF document text
    • http://www.kidnuri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160914d0da4a9c---kamutekavafi.pdfIn PDF document text
    • https://getlovebooks.com/wp-content/plugins/super-forms/uploads/php/files/73f17adbbfc8ce659955ae7fda506ade/juwimefukidonob.pdfIn PDF document text
    • https://dbjadow.pl/attachments/file/zewepunavodemiwuro.pdfIn PDF document text
    • http://czdashan.cn/uploadfile/file/2021051005264173499.pdfIn PDF document text
    • http://alpanelektrik.com/depo/sayfaresim/file/77411316348.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_off0000e0c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0C9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f8db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8DB 19140 bytes
SHA-256: 9bb5086ae3796acdf1f6a084e14a23d0ea1305dbbd9746c9c934e1e4de8a130f
font_02_sfnt_off00012add.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12ADD 10296 bytes
SHA-256: 69491682d4ba6ccafcfa48eb9e710aed757eab14f473b6713fb488ce296c633d

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