Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2c03fa880ea0bae…

MALICIOUS

PDF

76.1 KB Created: 2021-03-31 07:42:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 85aefeae6d730add5976eb5183d778a6 SHA-1: 5d8c45c0bdf4bc4f68294d18557e14f14c8fca52 SHA-256: d2c03fa880ea0baeca4c929a0bae706005d5bc28c4acde771ecb90e6a04e54ee
214 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to known malicious redirectors or link farms. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' and 'PDF_SEO_LINK_FARM' indicate that the primary purpose of this document is to direct users to potentially harmful websites. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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.
  • 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.
  • 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/award?keyword=partnership+deed+sample+in+pakistan+pdf In PDF document text
    • http://english-10.site/10699058783s5go0.pdfIn PDF document text
    • http://kinoxca.xyz/assassin_s_creed_odyssey_guided_vs_exploration7l0jj.pdfIn PDF document text
    • http://bu-markett.com/blake_chart_worksheetllwkx.pdfIn PDF document text
    • http://fakts.design/lanenigoxoze4v9xp.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486971/normal_603845537a3de.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4527164/normal_6021ba5ad4bba.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://77483064-5892-4b52-b419-66e751946b77.filesusr.com/ugd/ef7b09_666891fbe8414ccca0d6c94a22389adf.pdf?index=trueIn PDF document text
    • https://ebcfae26-b4e4-4f1a-a5b2-c5bdbddc1bdf.filesusr.com/ugd/259f90_c78b25ea3d394031930e2446584c0925.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xanunafojuloki/lake_of_the_ozarks_march_fishing_report.pdfIn PDF document text
    • http://xiniwipilanaju.atwebpages.com/77985192032.pdfIn PDF document text
    • https://s3.amazonaws.com/bibejovixapis/zebowofirasibibonulaluguw.pdfIn PDF document text
    • https://3789e5f8-265e-48cd-8836-241a044b7ceb.filesusr.com/ugd/45ef7e_ea27de6bbf7542178b0f8c933054504e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zolerazowubow/77715535223.pdfIn PDF document text
    • https://d67926d6-99fe-48a4-938f-95006fdf2de6.filesusr.com/ugd/21d82e_078aee588b1345a1a34dc449eb66eb9d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vofadoloves/how_to_hold_a_wooden_baseball_bat.pdfIn PDF document text
    • https://5c51e3d7-2896-491e-a255-1b002e356b93.filesusr.com/ugd/5b6ce5_e324eb85f68e46bb81a528e9cb1e5c08.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bezutu/67036350595.pdfIn PDF document text
    • https://s3.amazonaws.com/lolaritemukole/italian_renaissance_crossword_puzzle_answers.pdfIn PDF document text
    • http://posikin.myartsonline.com/biochar_pyrolysis.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_off0000ecf8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECF8 5348 bytes
SHA-256: 8234f7ae3d938fe9e03ea85d2f071a00bbf5e64b095ff2ce3249e7935388b867
font_01_sfnt_off0000fefd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEFD 10544 bytes
SHA-256: b8f08746bc2cabcb263138e5fa38df71ec518bc54e57792f2f81f4b35076fa52

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