Malicious PDF — malware analysis report

Static analysis result for SHA-256 df201bd14d7f3e47…

MALICIOUS

PDF

99.3 KB Created: 2021-03-01 03:24:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: d23c58a125928f4278da6f85bae83c79 SHA-1: d72bb92bc4a31c717f81d411a545d43b57eb6c81 SHA-256: df201bd14d7f3e47741fbae6ab5cdb546254d7ab3592f33b6cf9c49d44f771f9
94 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://yafferge.ru/aws?utm_term=preponderance+of+evidence+definition+black%2527s+law+dictionary'. The ML classifier also strongly flagged this PDF as malicious. While no scripts were extracted, the presence of a malicious URL within the document body indicates an attempt to lure the user to a harmful site, consistent with phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 3

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://yafferge.ru/aws?utm_term=preponderance+of+evidence+definition+black%2527s+law+dictionary In PDF document text
    • https://static.s123-cdn-static.com/uploads/4371807/normal_5feb0c633cd1a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403938/normal_5fe2989d4d918.pdfIn PDF document text
    • http://azorocheat5.xyz/report_dead_seal_maine9zbgz.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368225/normal_5ff36b469e5fc.pdfIn PDF document text
    • http://slampochka.ru/batman_arkham_city_ps3_pt_br8xfb4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459174/normal_5ff44a3f7d815.pdfIn PDF document text
    • http://tiruxukanemaga.iblogger.org/50273426766.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380691/normal_5fea115008ace.pdfIn PDF document text
    • http://4d-5d.com/cccam._cfg_enigma2168yd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375075/normal_6013b7f97d37f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/pusixa/manual_de_neurologia_veterinaria.pdfIn PDF document text
    • http://todamabofadufod.epizy.com/baghini_movie_song.pdfIn PDF document text
    • https://s3.amazonaws.com/xalexojaxipud/oracle_sql_substr_instr_example.pdfIn PDF document text
    • http://godavuvexo.epizy.com/ansys_workbench_fluent_tutorial.pdfIn PDF document text
    • https://s3.amazonaws.com/welanisowari/gufipokilefidewasusemof.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001380e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1380E 5432 bytes
SHA-256: ea0119043ca5d37380198e9ee0a29206478ebc89fb38fb6ec3742b263707cbca
font_01_sfnt_off00014aa4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14AA4 11328 bytes
SHA-256: f7b438217418651ccd3ddae8bb9af0948fd1ac9c89bb4d45372d2d42f63964a8
font_02_sfnt_off0001712d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1712D 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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