Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d54d35c381f421b…

MALICIOUS

PDF

76.3 KB Created: 2021-03-01 20:10:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 69905be65d59a38868d4f0661a94245f SHA-1: adfaf514a1f7c20081fc025dc8dd75ec460848ba SHA-256: 2d54d35c381f421b8f7d60b40b50dc966734b549ac55bbb366c46859c57f0225
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing indicating it links to known malicious redirector infrastructure. The ML classifier also strongly flagged this PDF as malicious. The embedded URL, 'https://dafemum.ru/strik?utm_term=tone+it+up+protein+and+greens+reviews', is likely used to lure users to a phishing or malware download page. ClamAV detection further supports its malicious nature.

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
  • 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://dafemum.ru/strik?utm_term=tone+it+up+protein+and+greens+reviews In PDF document text
    • https://cdn-cms.f-static.net/uploads/4495691/normal_603b409a34c6e.pdfIn PDF document text
    • http://auto-agents.space/dance_like_song_lyrics_mp3_downloadvsgqw.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4469831/normal_5fffc36307f49.pdfIn PDF document text
    • http://rosutob.getenjoyment.net/88779276502.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380382/normal_6012113f61af2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484806/normal_60380da0d1e65.pdfIn PDF document text
    • http://kadanijojabuf.mywebcommunity.org/lozuwexefodirudokoros.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/kujapomib/xigotoma.pdfIn PDF document text
    • https://s3.amazonaws.com/lorugipopuxe/catholicism_for_dummies_free.pdfIn PDF document text
    • https://s3.amazonaws.com/jokotaziweluge/classification_of_dermatophytes.pdfIn PDF document text
    • https://s3.amazonaws.com/jusuberu/tri_fold_brochure_template_google_slides.pdfIn PDF document text
    • https://s3.amazonaws.com/mevuzokekenojab/fast_cash_boyz_cash_walk.pdfIn PDF document text
    • http://jumepenitujox.atwebpages.com/37505490783.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_off0000de2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE2C 5076 bytes
SHA-256: a6929d7a31877d1cb253b71a2357b82b72fde30b8c22928dcd76b6005dc688b9
font_01_sfnt_off0000ef88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF88 11312 bytes
SHA-256: ea7421270024fd50350c2ae84b5225e730c2a077d74b5e2cc12d335311e399d0
font_02_sfnt_off00011646.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11646 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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