Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce95fc3e7d94e7be…

MALICIOUS

PDF

68.2 KB Created: 2021-05-26 07:45:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: adc441e4fb19fe0e6ed857418ea3c059 SHA-1: 131f609cb74d9ed12f0ccb71c7f7edb6194f9744 SHA-256: ce95fc3e7d94e7be31ecfb1082494f8b19ffa149e459a84240125276fbcffa83
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains a heuristic firing for an external URI pointing to 'nipisod.ru', which is flagged as malicious. The document body, though heavily obfuscated, contains text related to 'Biology mcq app for neet', suggesting a phishing or scam lure. The presence of embedded URLs and the ML classifier's high confidence score indicate a malicious intent, likely to redirect users to a phishing site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://nipisod.ru/strik?utm_term=biology+mcq+app+for+neet PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4490001/normal_6020cf63913fc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495973/normal_604de5b881f34.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378386/normal_605c878e45836.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495681/normal_605411e790cd9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425924/normal_600f37e1c08e3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383451/normal_5fd12dbe72da1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407064/normal_600fca082a23e.pdfIn PDF document text
    • http://fontawesome.iohttp://fontawesome.io/license/In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/benubapopikaj/gci_alaska_tv_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/nasitevu/80520390941.pdfIn PDF document text
    • https://s3.amazonaws.com/lejivugeleguwod/pisejuzumewubofesufotev.pdfIn PDF document text
    • https://s3.amazonaws.com/bipepezuwed/85105187325.pdfIn PDF document text
    • https://s3.amazonaws.com/nabifovu/tojigasedadixafelivix.pdfIn PDF document text
    • https://s3.amazonaws.com/zebarufuridorur/is_there_a_free_drawing_app.pdfIn PDF document text
    • https://s3.amazonaws.com/jinotugiwomo/9386312605.pdfIn PDF document text
    • https://s3.amazonaws.com/dixaleko/dobosuregew.pdfIn PDF document text
    • https://s3.amazonaws.com/pukaridimupo/swiffer_wet_jet_pads_amazon.pdfIn PDF document text
    • https://s3.amazonaws.com/dazovosugev/74223577860.pdfIn PDF document text
    • https://s3.amazonaws.com/zijivevip/block_story_mod_apk_unlimited_diamond.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_off0000c3f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC3F2 1724 bytes
SHA-256: 1b89cd0a613842fd28fcfc833bdab7ea257a045428400af7a208909e4f7f8713
font_01_sfnt_off0000cc7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC7D 5436 bytes
SHA-256: 2e6b03db00ae2d8bde2d9fadda07175b8f2d7d3d4116f1b880632ccfeaebd3d6
font_02_sfnt_off0000def3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEF3 10204 bytes
SHA-256: bf090f3b836ef3318a6bcd427e11c466cae7fe885444986d98c6e623b03dd759

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