Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2833f9b42bb47bb…

MALICIOUS

PDF

75.2 KB Created: 2021-06-06 07:49:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 00319e204938953f727c8adb81ab030e SHA-1: 4bfceecd177e32a6b16fb2eddaf1992ec4f9d627 SHA-256: f2833f9b42bb47bbc3bbcc8051bf1d2a761b21f916e110f8988779d12770a60d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link farm pointing to compromised WordPress sites, suggesting a phishing or malware distribution attempt. The presence of 'Omega ruby rom download citra' in the document body, combined with numerous URLs leading to PDF files hosted on various domains, indicates a lure for users to download potentially malicious content. The ML classifier and ClamAV detection strongly support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://drafthe.ru/uplcv?utm_term=omega+ruby+rom+download+citra
    • http://graphicon.hu/wp-content/plugins/formcraft/file-upload/server/content/files/1609aacc3e8263---2857956027.pdf
    • http://www.misshandicap.ch/wp-content/plugins/formcraft/file-upload/server/content/files/16075d6e99b0f6---sodukukubusezujonowenuseg.pdf
    • https://acrgroup.nl/userfiles/file/19204211204.pdf
    • https://skazkavdom.com/wp-content/plugins/super-forms/uploads/php/files/2ebdd0304fa67da1d8db40b96283010f/sokosupozixinevuxixu.pdf
    • http://alternativefitness.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608cc34623b96---sifonorukepazedaliz.pdf
    • https://kuechentreff-schmid.de/wp-content/plugins/super-forms/uploads/php/files/s31krh32q5c3vp7n919v6kq2eg/tolipitevakuvogagege.pdf
    • https://pinotcar.com/wp-content/plugins/super-forms/uploads/php/files/3f4f161a005b4e954c1034717303019c/tukezeripare.pdf
    • http://www.julitolaschools.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086167602045---fepawilubefabomijovon.pdf
    • http://baanpowertrain.com/wp-content/plugins/formcraft/file-upload/server/content/files/160982eb56f2c6---patewasenedagitikexaviwot.pdf
    • https://amerismithenterprises.com/wp-content/plugins/super-forms/uploads/php/files/33c59c613a73b953e946103ab07079e3/bowasixulatorafef.pdf
    • http://www.canadavisaservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b085131f28e---tiduviduxogulixuzosaxore.pdf
    • https://regenerativetherapyforpain.com/wp-content/plugins/super-forms/uploads/php/files/edb5af26e0f02a64fd00802e7456b402/61102006193.pdf
    • http://www.hkwebdesign.com.hk/wp-content/plugins/formcraft/file-upload/server/content/files/160931d5887a74---varukupavinimirafime.pdf
    • http://grani-tonkogo-mira.ru/wp-content/plugins/super-forms/uploads/php/files/689325262ef77b778da84e792a5c46c8/81041011365.pdf
    • https://michaels-limo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080b11f56e97---19419349955.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e4a8.bin
11150bc8a01a7fe6e5be9290010199ce95a7cada496dd3dff6af1b1a5507753f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE4A8 5444 bytes
font_01_sfnt_off0000f720.bin
3b3569d504b42a4d986c010c806767dadffe10c499be8eebd5c59908ab90199c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF720 12068 bytes

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