Malicious PDF — malware analysis report

Static analysis result for SHA-256 ceff770fea4f679e…

MALICIOUS

PDF

70.8 KB Created: 2021-02-24 23:01:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: a8bcdc8e3df6c8cb11fb5ad0f742d294 SHA-1: bed40abc5ba1e353eb5dffecf4b887e650b6ef14 SHA-256: ceff770fea4f679e5b55c04fc600f8606f98108ac805a20ac4d870b015cd654c
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, indicating an attempt to phish or deliver malware. The ML classifier and ClamAV detection strongly support this assessment. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to malicious sites, likely for credential harvesting or further payload delivery.

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://yafferge.ru/strik?utm_term=how+high+should+you+put+a+bat+box In PDF document text
    • http://parralax.net/vitamix_food_processor_reviewlri85.pdfIn PDF document text
    • http://creditreportfast.info/zepefenifygy0.pdfIn PDF document text
    • http://trokot-roznica.xyz/vowubulofudabokkq.pdfIn PDF document text
    • http://fresh-ita.space/android_6._0_1_battery_percentage57514.pdfIn PDF document text
    • http://sugameloxufe.mywebcommunity.org/dusilujixo.pdfIn PDF document text
    • http://rexonina.medianewsonline.com/mary_poppins_cast_2019_imdb.pdfIn PDF document text
    • http://reflectionss.space/correction_of_sentences_exercises_with_answers4zetx.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/muxozuvalubi/lionhead_rabbit_care_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/jedadokuti/7887540827.pdfIn PDF document text
    • https://s3.amazonaws.com/bifadiwuwileji/aerith_s_theme_piano_sheet_music.pdfIn PDF document text
    • http://gafodix.myartsonline.com/sharp_aquos_reset_pin.pdfIn PDF document text
    • http://fisejotigu.epizy.com/free_carrom_board_game_for_pc.pdfIn PDF document text
    • https://s3.amazonaws.com/vexosafugunu/guitar_chords_finder_apk.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_off0000d97b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD97B 5488 bytes
SHA-256: 0c1eabc3013db1d358572767d3b9052c9e85d6614d0afea7dd9e7e7674eea36e
font_01_sfnt_off0000ec36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC36 9980 bytes
SHA-256: 6b5d1b0534f7564ee7f15dd3c8aaaad2819020e93ffa40349ae7ab8038ed67bb

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