Malicious PDF — malware analysis report

Static analysis result for SHA-256 86d3e3b7b4a19e79…

MALICIOUS

PDF

68.0 KB Created: 2021-02-08 08:44:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: e2bfac1530ed9da22bfed327cc9c78e5 SHA-1: 5cfc6079fda5ce23d0563f818c0e55399dfbd86d SHA-256: 86d3e3b7b4a19e79c0f62a7a8834b064436033529895b173da703ce325b082cb
96 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URL, identified as a phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent. The PDF's content, though partially obfuscated, suggests it is designed to trick users into visiting the external URL, likely to download further malicious content or lead them to a phishing site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://bologen.ru/aws?utm_term=empty+number+line+addition+and+subtraction+worksheet PDF link annotation
    • https://cdn.sqhk.co/loxowopiv/gcXHd91/79953858211.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422877/normal_60192cd667f17.pdfIn PDF document text
    • https://cdn.sqhk.co/farafakilof/hjegd9H/starfish_movie_2018_synopsis.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375896/normal_5fe551ed50762.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410730/normal_5ffe829421e8e.pdfIn PDF document text
    • https://cdn.sqhk.co/jemajujo/1EjbD0s/75453924632.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484126/normal_5fd8af033dc1b.pdfIn PDF document text
    • https://cdn.sqhk.co/gufezitaxato/22pXnhc/stickman_backflip_killer_5_apk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368742/normal_5fd31b36261aa.pdfIn PDF document text
    • https://cdn.sqhk.co/pavujakorige/aigheaT/taming_a_wild_house_cat.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377379/normal_5fd627a69b642.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4462379/normal_5fe50efca347e.pdfIn PDF document text
    • http://sexafilavu.iblogger.org/pisoxageregivamufoputek.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://teporududa.rf.gd/hollywood_action_movie_tamil_dubbed_tamilrockers.pdfIn PDF document text
    • http://fasokefukolu.epizy.com/nobepadidabedewo.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_off0000cdac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDAC 5668 bytes
SHA-256: acacaa2031968491a48ddffebd9501d2ea9e74adf0502e2c6813f7c6e8c3f0e0
font_01_sfnt_off0000e0d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0D7 9992 bytes
SHA-256: 5558e5fbe0045cd13be1b163346564c023447e6effa5390c5cee3fc2ed7c5143