Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c9c3bd00c25924b…

MALICIOUS

PDF

68.8 KB Created: 2021-02-18 12:31:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: e9eda66954e9e47f337276df9ea28d93 SHA-1: f5a59446012fd6d62255a0c91da939658b8f1f7f SHA-256: 8c9c3bd00c25924bf61e03243c636a07aa038d647b789850ab5e8cebc41489f3
156 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, and it contains a large number of external links, indicating a link farm or phishing attempt. The presence of embedded URLs and the heuristic 'PDF_SEO_LINK_FARM' suggest the document is designed to redirect users to potentially harmful websites, such as the one found at 'https://maypoin.ru/wix?keyword=heating+and+cooling+curves+worksheet'. No scripts were extracted, but the overall structure and URL patterns are consistent with phishing or malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://maypoin.ru/wix?keyword=heating+and+cooling+curves+worksheet PDF link annotation
    • https://titugujogimob.weebly.com/uploads/1/3/4/0/134017720/3918808.pdfIn PDF document text
    • https://pewoguliburutoj.weebly.com/uploads/1/3/4/2/134234653/gogodoxenukix-liwenel-ziwugete-jarikege.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381320/normal_6002bd995f79e.pdfIn PDF document text
    • https://xumotisububilup.weebly.com/uploads/1/3/4/5/134591263/11aa21bae43e6.pdfIn PDF document text
    • https://dowusezawidi.weebly.com/uploads/1/3/3/9/133997386/nabebosije-jodarikit-jejaw-jadifurudo.pdfIn PDF document text
    • http://idealica-co.site/vovivozak8uhvh.pdfIn PDF document text
    • http://buloshnaya.site/50903650109t394b.pdfIn PDF document text
    • http://runmasten.online/82576471481f9q0r.pdfIn PDF document text
    • http://axecheat5.xyz/35036350296uavmd.pdfIn PDF document text
    • http://sfhgfje5df.xyz/great_little_war_game_download7kep5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474448/normal_602cf45e5e33e.pdfIn PDF document text
    • https://webunufilijamo.weebly.com/uploads/1/3/4/6/134677486/8680290.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391599/normal_600a1eba56cbf.pdfIn PDF document text
    • https://wowavimisaken.weebly.com/uploads/1/3/0/8/130814021/mivezuzopoluri.pdfIn PDF document text
    • https://dosijikapok.weebly.com/uploads/1/3/2/6/132682778/zelad.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484632/normal_5fdd46173a12e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/fotojipifuzitul/kuligogefuguzifadaboxepog.pdfIn PDF document text
    • https://s3.amazonaws.com/rimepusox/jikitakilozikepew.pdfIn PDF document text
    • https://s3.amazonaws.com/fuwenoxuzasila/a_student_ka_full_form.pdfIn PDF document text
    • https://s3.amazonaws.com/tifuwuw/minecraft_pc_free_1._12.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d18e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD18E 5376 bytes
SHA-256: f0f1d27de932a8e60cc4ed6fa89546ab66e11468300d2dc845ba2e59a6eb2d86
font_01_sfnt_off0000e3e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3E5 10012 bytes
SHA-256: 58fa68381a0be61151ca649e17d8ca2aa3d08c43406ba13673e5e6e55989f54c

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