Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c8599c545a88012…

MALICIOUS

PDF

157.5 KB Created: 2021-02-26 15:42:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 4cc49363668f9df8633bf3677fc38eb6 SHA-1: bc4f278d1138f8aab7298d5ae1cf7fcfd2300081 SHA-256: 5c8599c545a88012e85098ae2f3fe5b352173ebbfadfb8d3f4a13cd0c6ad8c6d
96 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains an embedded URI pointing to 'golowaki.ru', which is likely a phishing or malware distribution site. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to malicious content, potentially exploiting vulnerabilities or delivering further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://golowaki.ru/strik?utm_term=snape+the+half+blood+prince+wiki PDF link annotation
    • http://onatural.space/garmin_nuvi_50lm_lifetime_map_updatesw75fw.pdfIn PDF document text
    • http://winoraama.website/bivasamaniteboduqkap8.pdfIn PDF document text
    • https://cdn.sqhk.co/kinemefuwa/IVjHgh1/smithsonian_channel_app_samsung_tv.pdfIn PDF document text
    • https://cdn.sqhk.co/nisisepolo/iRq9jg8/30358465960.pdfIn PDF document text
    • http://vorecan.fun/hungry_shark_world_hilesi_apkk91tk.pdfIn PDF document text
    • https://cdn.sqhk.co/tinulafi/iheujhd/vukulexikokezatawewapeg.pdfIn PDF document text
    • https://tofariviviri.weebly.com/uploads/1/3/4/1/134109347/c14a41d0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415524/normal_6020cae79bcb9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496148/normal_6018bdcc5bfd0.pdfIn PDF document text
    • http://vashastrahovka24.ru/pmbok_guide_5th_edition_freed5m2r.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421462/normal_5ff0a0f34fab8.pdfIn PDF document text
    • https://sivevaredewiw.weebly.com/uploads/1/3/4/4/134464028/xutop.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387427/normal_600308de043e5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/fexuror/25116784413.pdfIn PDF document text
    • https://s3.amazonaws.com/xamibudasagas/eye_candy_free.pdfIn PDF document text
    • https://s3.amazonaws.com/midizaxopazeji/counter_strike_1._36.pdfIn PDF document text
    • http://rawozenagi.epizy.com/43917798808.pdfIn PDF document text
    • https://s3.amazonaws.com/mesixadelomomo/bleach_brave_souls_hack_ios.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_off000231a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x231A7 5464 bytes
SHA-256: 54c8a53c7856a97c6325e1e62fef067723bda828085124f15ca5bcaa802efef1
font_01_sfnt_off00024448.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x24448 10888 bytes
SHA-256: a5bc2d504224de0c079ff541a7c1988a0d8998669b7275c559e5d4f30843fb3c

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