Malicious PDF — malware analysis report

Static analysis result for SHA-256 f132da3ef5435e3f…

MALICIOUS

PDF

79.3 KB Created: 2021-09-21 21:36:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: f832853380d1edf0f99b41e150c67ee9 SHA-1: 203f311e13695e842d210dd9568efd9af685803b SHA-256: f132da3ef5435e3f24b8e3670856ab5340746b5580be5b3e06f89785d4e9e451
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to disposable domains and are structured as link farms, a common tactic for phishing or distributing further malware. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the PDF structure and embedded links suggest it's designed to redirect users to malicious content, likely as part of a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://oniceh.ru/uplcv?utm_term=roblox+adopt+me+futuristic+house PDF link annotation
    • https://perfecthospitals.org/ckfinder/userfiles/files/jogigabifazobavak.pdfIn PDF document text
    • http://minipit.com/data/files/37548399143.pdfIn PDF document text
    • http://eyupsifalibitkiler.com/resimler/files/91947243618.pdfIn PDF document text
    • https://bosingels.nl/ckfinder/userfiles/files/bexexekewuxa.pdfIn PDF document text
    • https://sabagdasarov.ru/upload/file/32129026757.pdfIn PDF document text
    • http://gr-chem.com/upload/files/95275894001.pdfIn PDF document text
    • https://stephan-kratt.de/data/reiterhof/userfiles/file/38191034613.pdfIn PDF document text
    • https://pingthye.com/userfiles/files/16724911774.pdfIn PDF document text
    • https://www.wroclawmodelshow.pl/ckfinder/userfiles/files/33726811364.pdfIn PDF document text
    • http://aeon-dev.com/uploads/files/202109201909089071.pdfIn PDF document text
    • http://cafesezony.ru/fck_editor_files/files/99199207165.pdfIn PDF document text
    • https://777mto.info/contents/files/fapegugisogoros.pdfIn PDF document text
    • http://crmloccitanecr.com/campannas/file/kazosuzafiwezekaliji.pdfIn PDF document text
    • http://napiarsaigh.com/images/narabasudeviwudos.pdfIn PDF document text
    • http://sunrui-ti.com/d/files/wugugunebexuf.pdfIn PDF document text
    • https://gagiongvitgiong.com/ckfinder/userfiles/files/47558647236.pdfIn PDF document text
    • http://na-bytecek.cz/UserFiles/File/56021177332.pdfIn PDF document text
    • http://bargiel.com.pl/ckfinder/userfiles/files/satozevotoput.pdfIn PDF document text
    • https://activepymes.com/pub/file/sipulexukazareb.pdfIn PDF document text
    • https://playerpress.com/ckfinder/userfiles/files/maravim.pdfIn PDF document text
    • https://hglobaltourb2c.com/FileData/ckfinder/files/20210908_845EB516FFE8CEAC.pdfIn PDF document text
    • https://apgr.eu/UserFiles/file/pobozizineterowesawojuw.pdfIn PDF document text
    • http://top-rubber.com/admin/fckeditor/editor/filemanager/connectors/upload/file/rapuravokadepasagikemamim.pdfIn PDF document text
    • http://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613405063e0f9---xenefefedikonegomit.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_off0000c944.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC944 11168 bytes
SHA-256: 46d96239f79af8281c508a0ea2cc4dd5a33ef7d65186a57f1ebe2a371a32a496
font_01_sfnt_off0000e330.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE330 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000fb42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB42 19728 bytes
SHA-256: 412c4d89ee45d94dae9327ab8e5f4241ad88c1506b13d0e29c453788b4e00cc5

Open this report in the interactive analyzer, or submit your own file for analysis.