Malicious PDF — malware analysis report

Static analysis result for SHA-256 a3872e481b6a8897…

MALICIOUS

PDF

57.1 KB Created: 2020-11-04 03:01:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 78d554380cc6c128d6167a0350d8ac12 SHA-1: dc1ab984951fb329aa80dd67b435170e1cf54e26 SHA-256: a3872e481b6a88974336d5729259fa65343d5f1d5fdfcd632d9a334e7ca8f926
94 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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://ggtraff.ru/aws?keyword=a+clockwork+orange+book+pdf+free In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366331/normal_5f8712030baf5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375207/normal_5f8a4f5870769.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411917/normal_5f9805613ae86.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369648/normal_5f985c24b8206.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/b2239bae-68f4-4a5e-b5d4-509db9cbec44/zevefodepopojejuzo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f237d786-f61e-47c1-87e7-356b90411c4c/63037560944.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/81299b16-32fe-4c94-968a-27d10f93b94d/84785915289.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e64021cb-c8b4-493b-8c00-eb5b59734ee6/24442222244.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3e2c4d7d-010e-477b-90a2-bb11a805c189/84877627568.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0fb40521-aff2-409d-8fb4-97ececcae5d6/catlogo_de_cdulas_do_brasil_2016.pdfIn PDF document text
    • https://s3.amazonaws.com/sugosubexez/word_that_rhyme_with_me.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ae4d92fc-8f98-4b36-9271-40c8b1916935/vapifolag.pdfIn PDF document text
    • https://s3.amazonaws.com/muxozuvalubi/maxodabasazokolotigu.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_off0000a0e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA0E6 5428 bytes
SHA-256: 4293945b2f9e13469f8199d0e54e786afca9571e55b36aa6589161a5eb7cdebf
font_01_sfnt_off0000b382.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB382 10704 bytes
SHA-256: 3cb11d55634830df35b2821078d18f1315e146473fc8b4a6d3685c77e76e3067