Malicious PDF — malware analysis report

Static analysis result for SHA-256 2bec561c87353ceb…

MALICIOUS

PDF

81.1 KB Created: 2021-09-01 22:48:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: da2ba499a32df079a7d5303465a931f1 SHA-1: 9552de71a07f625fac50e3a14a91fec822b4b286 SHA-256: 2bec561c87353ceb5391f595b6543aab6ae1d0db3465570442c2a03fd91f1d4b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous embedded URLs, many pointing to compromised CMS upload storage or disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The presence of these links and the overall structure strongly indicate an attempt to facilitate phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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://catamma.ru/uplcv?utm_term=the+island+of+vieques PDF link annotation
    • http://amirafouad.com/uploaded_files/file/robixavasokomonopos.pdfIn PDF document text
    • https://saikekanglun.com/filespath/files/20210826012810.pdfIn PDF document text
    • http://mentaplywood.com/images_upload/files/40808769259.pdfIn PDF document text
    • https://playerpress.com/ckfinder/userfiles/files/65868718679.pdfIn PDF document text
    • http://hexindechem.com/upload/files/13232277790.pdfIn PDF document text
    • http://bulmarconsult.com/files/90692392089.pdfIn PDF document text
    • https://deniz-sogutma.org/img/userfiles/file/21736603617.pdfIn PDF document text
    • http://co-wemart.com/careeruserfiles/file/67190645850.pdfIn PDF document text
    • https://smarttactic.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a2b493299ad---lonusazepeg.pdfIn PDF document text
    • https://www.syah.org/wp-content/plugins/super-forms/uploads/php/files/66d963aa72fb060a074ba047853e6aed/86306958979.pdfIn PDF document text
    • https://aryaayur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160995330b0751---genugawupuzikimi.pdfIn PDF document text
    • http://bioident.pl/photos_fck/file/78798197574.pdfIn PDF document text
    • http://snsi.jp/image/news_file/delodiwumesuzevonexuduj.pdfIn PDF document text
    • https://member-amz-seller-system.de/wp-content/plugins/super-forms/uploads/php/files/5449f5b31eb2ebab3b680ec538142360/41352742625.pdfIn PDF document text
    • http://toyotacri.com/userfiles/files/lexarosimunivonepurokorus.pdfIn PDF document text
    • http://tasteofruraleurope.eu/upload/File/76363511126.pdfIn PDF document text
    • https://www.getfitcrew.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a24a1072615---zetinavexirokuzomolabax.pdfIn PDF document text
    • http://www.cpiequipos.com/assets/images/user_files/files/26170799427.pdfIn PDF document text
    • https://e-lightingcontrols.com/wp-content/plugins/super-forms/uploads/php/files/5ae2f02170f0ab75a1359b08e7b4eda6/jemuxinagepawudavazateku.pdfIn PDF document text
    • https://ncfouting.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cfc459e6938---mijikumis.pdfIn PDF document text
    • http://industrialdevices.in/uploads/14684495738.pdfIn PDF document text
    • http://antasboru.com/guvennet/resimlerfiles/zubovirodeda.pdfIn PDF document text
    • http://peaceinsrilanka.lk/userfiles/file/tekigerewipilojoraf.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_off0000d46b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD46B 10528 bytes
SHA-256: 46a9d27cbea07fea556939a23ec797251cbe327765071dd27dea6b43d4f60dd9
font_01_sfnt_off0000ec1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC1E 19032 bytes
SHA-256: a243c74972879febe60b38a1a8d625b5ef36e293483cc89be88c3b9595269162
font_02_sfnt_off00011dd2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DD2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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