Malicious PDF — malware analysis report

Static analysis result for SHA-256 6fe0dd3f665ad401…

MALICIOUS

PDF

113.0 KB Created: 2021-02-21 11:48:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 9600ef57815ce2d4a1b07f0b01577ef4 SHA-1: e8dabe6ea61d7ce65ac32b145c76cedb6df9b01f SHA-256: 6fe0dd3f665ad401c9f8d65c86a2ffc479b277366931a8c26824d3a8669225f4
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing indicating a malicious redirector link to 'https://yafferge.ru/strik?utm_term=1001+spells+cassandra+eason+pdf'. This strongly suggests the document is designed to lure users to a malicious site, likely for phishing or to download further malware. The ML classifier also flagged this PDF with a high probability of being malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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=1001+spells+cassandra+eason+pdf In PDF document text
    • http://jarobadut.22web.org/alphabet_letters_worksheets.pdfIn PDF document text
    • https://zasuzepomuban.weebly.com/uploads/1/3/4/6/134627511/8642991.pdfIn PDF document text
    • http://bugesawuterodam.iblogger.org/encounter_telugu_movie_songs_free.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4422622/normal_5fe0f479e1d8f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500678/normal_5fe625d36ff7d.pdfIn PDF document text
    • https://matexofetuboso.weebly.com/uploads/1/3/1/4/131453592/6c62f516d.pdfIn PDF document text
    • http://mafaregasinuviv.22web.org/kluri_skill_tree_guide.pdfIn PDF document text
    • https://kigilejujagenit.weebly.com/uploads/1/3/1/4/131438309/ropugisuled-nabif-rubasitipikax.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4401525/normal_5fe4702783b77.pdfIn PDF document text
    • https://dajexuxeguse.weebly.com/uploads/1/3/4/8/134859846/sivuz.pdfIn PDF document text
    • https://xadadoroz.weebly.com/uploads/1/3/6/0/136024884/5227132.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366014/normal_60309ce949b4e.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/sonutopexaramuf/lg_g_vista_cell_phones_for_sale.pdfIn PDF document text
    • http://magelul.epizy.com/skull_bones_formed_by_intramembranous_ossification.pdfIn PDF document text
    • https://s3.amazonaws.com/lakadutof/2221477175.pdfIn PDF document text
    • https://s3.amazonaws.com/tasufagijaremo/46965973545.pdfIn PDF document text
    • https://s3.amazonaws.com/wanasuvedigo/kotlin_language_android.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_off000172cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x172CC 4908 bytes
SHA-256: 9e634365e27e7798f6106b8563b5c0baa785d67ed3bf1010fb421dd91379a174
font_01_sfnt_off0001836f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1836F 10864 bytes
SHA-256: 659c1a76e026f3732b1a743b3cef907fa8f57667e0de565e2042ab440e4ed10d
font_02_sfnt_off0001a89c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A89C 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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