Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee05326b0380778b…

MALICIOUS

PDF

84.8 KB Created: 2021-09-18 06:54:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21
MD5: c446808dc3bd9f4de640c2354e6e400e SHA-1: a7ab85d3d4fe0856d62385dbc310c73231f0fd5f SHA-256: ee05326b0380778be93088b82adb2efb0e736fd22016f89355f8dec88f5225df
134 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 high likelihood of malicious intent. Heuristics identified it as a link farm with numerous disposable domains, suggesting a phishing or malware distribution scheme. The presence of embedded URLs and the PDF_SEO_DISPOSABLE_LINK_FARM heuristic strongly indicate that the document's primary purpose is to redirect users to malicious sites for downloading further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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
  • 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://oniceh.ru/uplcv?utm_term=bleach+vs+naruto+mod+download PDF link annotation
    • http://toitureetfacade.fr/data/Files/digik.pdfIn PDF document text
    • http://ellissi.org/userfiles/files/nomamafiminav.pdfIn PDF document text
    • http://gavionescodeinsa.com/userfiles/zewufinibudamorosabu.pdfIn PDF document text
    • http://sunwisechem.com/Uploadfiles/files/fomoxuderabekikezipewod.pdfIn PDF document text
    • http://tamtamphat.com/upload/files/32419394317.pdfIn PDF document text
    • http://namhungholdings.com/uploads/ckfinder/files/sazeze.pdfIn PDF document text
    • http://bdsps.org/slbdavbatala/userfiles/file/39278791312.pdfIn PDF document text
    • https://livbiopharma.com/userfiles/file/tujoxivulototamopakifani.pdfIn PDF document text
    • http://hladonural.ru/upload_picture/mojirazawage.pdfIn PDF document text
    • https://bonaparte.cappencms.com/templates/files/14447442930.pdfIn PDF document text
    • http://smenergy.kr/uploaded/file/17535843206130db73c4e2e.pdfIn PDF document text
    • https://maturana.cl/upload/file/revipapozobotegananudamus.pdfIn PDF document text
    • http://firmykominkowe.pl/Obrazki/edytor/file/30927658109.pdfIn PDF document text
    • https://osakaav.com/userfiles/files/69470286253.pdfIn PDF document text
    • https://argentinaproduct.com/ckfinder/userfiles/files/87886486428.pdfIn PDF document text
    • http://southerncross-ex.com/images/blog/file/vuvafowisuriwixapifofa.pdfIn PDF document text
    • http://digitalpolicycouncil.com/imagenes/file/36507558876.pdfIn PDF document text
    • http://ct-tci.com/cttax/userfiles/files/5263653184.pdfIn PDF document text
    • https://poolpoint.be/uploads/file/82714511725.pdfIn PDF document text
    • http://benedictinoselrosal.org/ckfinder/userfiles/files/vepajiju.pdfIn PDF document text
    • http://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613552c7cdc05---zaturagupowugirojotus.pdfIn PDF document text
    • http://bpabv.nl/uploadfiles/file/jeros.pdfIn PDF document text
    • http://saiprogetti.net/userfiles/files/12997762936.pdfIn PDF document text
    • https://calienglish.com/ckfinder/images_store/files/midudixa.pdfIn PDF document text
    • https://fiberglasssupplydepot.com/userfiles/file/tinizete.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_off0000de00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE00 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f612.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF612 20236 bytes
SHA-256: a9272eac3b0bd8f8d1ad9fd2ccc570fbc957557ca663df7615117c12c74498e8
font_02_sfnt_off00012c0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C0B 10848 bytes
SHA-256: 2a156c441f70d04d8418f0e4bf5a20ee364e0e6e586840b2d18f52b8ff411f13