Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ab0a0f20a773df6…

MALICIOUS

PDF

81.5 KB Created: 2021-09-12 04:16:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: ac0680a24be8774d99050c9de60cce11 SHA-1: a2d9e330f45d563355f4a07b23436130c9282324 SHA-256: 2ab0a0f20a773df60247add9169839adc6ef1306a6b18a8b77bcfef3e1d4c62f
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains embedded JavaScript and numerous external URIs, many of which point to compromised CMS upload directories or are part of a link farm hosted on disposable domains. The primary function appears to be redirecting users to potentially malicious websites, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://pixomot.ru/uplcv?utm_term=harry+potter+1+read+online PDF link annotation
    • http://asu.com.vn/wp-content/plugins/super-forms/uploads/php/files/a792vqdh0hgihioqd9fq38ro7h/suxibesefupusafi.pdfIn PDF document text
    • http://vrieshorst.nl/images/uploads/file/39475392035.pdfIn PDF document text
    • https://sipsib.ru/wp-content/plugins/super-forms/uploads/php/files/29698518e749e0cd4595f54798bb31a2/gumunawelagepowikuxosote.pdfIn PDF document text
    • http://goldartline.ua/userfiles/file/buvisax.pdfIn PDF document text
    • http://aczelzalog.hu/tmp/wugukimebokoze.pdfIn PDF document text
    • http://kingtonkatsu.com/uploads/files/rolanasoxonipan.pdfIn PDF document text
    • http://energyexcess.com/userfiles/file/jitokerufobe.pdfIn PDF document text
    • http://sunmoon-glory.com/web/upload/files/luzif.pdfIn PDF document text
    • https://www.autopsrus.com/ckfinder/userfiles/files/vivulezaduxapisokafa.pdfIn PDF document text
    • https://wentworthre.com/wp-content/plugins/super-forms/uploads/php/files/b47538e8a9576183a4a8b73aef1ee03d/japopojupu.pdfIn PDF document text
    • https://www.hotel-restaurant-plainfaing.fr/ckfinder/userfiles/files/48368217458.pdfIn PDF document text
    • http://sirindhorn.net/upload/File/rapezizizivokiwetagos.pdfIn PDF document text
    • http://3sdent.com/upload/files/11043443823.pdfIn PDF document text
    • http://jewelry-shopping-city.com/uploads/files/202109050336494087.pdfIn PDF document text
    • http://www.vljainandco.com/userfiles/files/8404411083.pdfIn PDF document text
    • https://associazionemusicaviva.it/uploads/file/56186092046.pdfIn PDF document text
    • http://jl-vacuum.com/upload/files/17965263759.pdfIn PDF document text
    • http://training-solutions.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16134f15c2382a---27639314687.pdfIn PDF document text
    • http://splogservice.ru/content/files/78096551072.pdfIn PDF document text
    • https://gfwofficial.com/ck_imgs/files/jipuxexifuxug.pdfIn PDF document text
    • http://www.thegrcinstitute.org/app/webroot/js/ckfinder/userfiles/files/48126127878.pdfIn PDF document text
    • https://baxsporthorses.nl/userfiles/file/36005586436.pdfIn PDF document text
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/p0qgqsegro28jt3v9lgplofp35/21083380499.pdfIn PDF document text
    • http://marathon-gexin.com/Uploadfiles/files/60749653394.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_off0000dc08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC08 10372 bytes
SHA-256: 03e4b9250f3cc4361bf0c93d8f0c00b607a94fb9a04d5b654683eb60f024681a
font_01_sfnt_off0000f393.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF393 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010ba5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BA5 17256 bytes
SHA-256: f0ed1f5086db612fffc2e051053115b6e1b211bb77783cf175e012a66cb782f6

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