Malicious PDF — malware analysis report

Static analysis result for SHA-256 680605ae0b7cb83a…

MALICIOUS

PDF

77.4 KB Created: 2021-01-17 14:10:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: f64e33acc4b3701a400a70bc0d11c62a SHA-1: a6165b8b698bde3975a4c74ffb3b4f67dc888831 SHA-256: 680605ae0b7cb83abdd4b628dcc814a0429bee5d58c93b2ac4eff183e7b0ffb6
96 Risk Score

Malware Insights

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

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URL that, when clicked, leads to a domain associated with malicious activity. The document body, though heavily obfuscated, appears to be a lure related to 'Rstudio cheat sheet statistics'. No scripts were extracted, but the presence of an external URI and the overall detection profile strongly suggest a phishing or malware delivery attempt.

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://trafficel.ru/aws?utm_term=rstudio+cheat+sheet+statistics PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4387040/normal_5f99bac87f5b4.pdfIn PDF document text
    • https://site-1168054.mozfiles.com/files/1168054/xejiperuxukivo.pdfIn PDF document text
    • https://cdn.sqhk.co/sarowojep/ij6PeId/super_meme_soundboard_2020_pro_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/segenapiza/eZgesji/xoxola.pdfIn PDF document text
    • https://cdn.sqhk.co/fawabanof/ML72jfR/60929576805.pdfIn PDF document text
    • https://cdn.sqhk.co/vekuperik/dQYhc4v/cheddars_eclub_login.pdfIn PDF document text
    • https://cdn.sqhk.co/xeveweno/vhhgjic/best_all_in_one_arcade_games.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/jixerubowi/sexual_and_asexual_reproduction_in_plants_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/gonafoziguwewe/bubbleupnp_apk_pro.pdfIn PDF document text
    • http://zewogukanonudut.epizy.com/39160926611.pdfIn PDF document text
    • https://s3.amazonaws.com/nalifij/jivomugazukomiwisanolones.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dc40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC40 4904 bytes
SHA-256: d5f980d7da2e046e8c6acf45420f858314e19376b356073039a6df8f09fdb2cd
font_01_sfnt_off0000ecf0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECF0 11084 bytes
SHA-256: d51e7b2d7fcc34a1ae0aa4ce1edeb39f33ee85fb2df6b94cb7908e09d8081dd5
font_02_sfnt_off000112a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112A7 16344 bytes
SHA-256: f3b95f1269985bafc3dfb9b5b35e76df8a4d57039a143c013aed99c7cf3a4a89