Malicious PDF — malware analysis report

Static analysis result for SHA-256 483b722577f2f261…

MALICIOUS

PDF

199.4 KB Created: 2021-05-12 18:28:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: b315fd6d46be68ebdf8a2c3801014793 SHA-1: 2052e8cea26014ba2f3aecb92a3f8873547403f8 SHA-256: 483b722577f2f261a1b7f92287c38d9d36351d147901d2836beb53e83be78982
154 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, directing users to 'https://yafferge.ru/strik?utm_term=best+kaiju+ever'. This indicates a phishing attempt to lure users to a malicious site. The ML classifier also strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the heuristics suggest a phishing or redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

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
  • 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/strik?utm_term=best+kaiju+ever In PDF document text
    • http://kolomata.ru/997411540714hgcj.pdfIn PDF document text
    • https://narosixepitifon.weebly.com/uploads/1/3/5/9/135960882/kigepinarajirumujir.pdfIn PDF document text
    • http://organic100.fun/leather_oxford_style_boots240vp.pdfIn PDF document text
    • http://misstourist.info/acropolis_museum_virtual_tourz3dhu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415524/normal_5ffe5aedaebfb.pdfIn PDF document text
    • https://kusazejur.weebly.com/uploads/1/3/1/4/131437880/35917caf9a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446390/normal_5fffc4ae7bcfc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418180/normal_606e89311ec70.pdfIn PDF document text
    • http://ideal-it.fun/page_break_in_word_mac8k6ho.pdfIn PDF document text
    • https://gajatizu.weebly.com/uploads/1/3/5/3/135315297/1356794.pdfIn PDF document text
    • https://mapunexi.weebly.com/uploads/1/3/3/9/133999872/tifojinujuduxe.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388271/normal_5ff2022dad006.pdfIn PDF document text
    • http://keepsufi.space/why_energy_storagepvx4p.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479673/normal_605ce96b31000.pdfIn PDF document text
    • https://kotepavugenufe.weebly.com/uploads/1/3/4/5/134592782/zobokewizonod-tuzawixuve.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421630/normal_5fd0ff6acf019.pdfIn PDF document text
    • https://litufefanim.weebly.com/uploads/1/3/4/9/134901191/xomusiburun-pupemelomewup.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/32681e76-40a4-43d6-b3a5-b9843cfb1bb1/bitusulumapime.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/90ff4bc9-256a-4c73-8f16-8e94bd3ee734/reading_comprehension_quizzes_for_5th_grade.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_off0002a574.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2A574 14000 bytes
SHA-256: 9847549c6ef83f21284b4efa4e775fd212663b93f71bac0ead5094109ddad682
font_01_sfnt_off0002d305.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2D305 4896 bytes
SHA-256: f8c7a8b1420df9057f82e1238a4004eb8c7543e8f858fd8befe05364280e7a78
font_02_sfnt_off0002e3cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E3CD 13372 bytes
SHA-256: accf7fff077a8cd7f0fb4fb5dd27758d3fa0e56bdecbbc6fec5a00fe92db5288

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