Malicious PDF — malware analysis report

Static analysis result for SHA-256 dad255dfbe499763…

MALICIOUS

PDF

68.4 KB Created: 2021-03-10 20:36:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 0476c018bbde2ec493f0db7c47dd8997 SHA-1: 26fb330ffaeaf0c6e27739befa88c4a7f0e7ed7d SHA-256: dad255dfbe49976397ff1d74607231ac832daa67abb3cbeef35a581a595c884d
154 Risk Score

Malware Insights

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

The PDF contains embedded links pointing to known malicious redirector infrastructure, as indicated by the 'PDF_MALICIOUS_REDIRECTOR_LINK' heuristic. The ML classifier and ClamAV detection further support its malicious nature. The document body, though heavily obfuscated, appears to be a lure related to 'Australian rainbow fish for sale uk', suggesting a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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=australian+rainbow+fish+for+sale+uk In PDF document text
    • https://cdn.sqhk.co/sogefuluf/hjWVU3X/lomifu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485440/normal_5fe06f0091647.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4528876/normal_5fd091b9ce6bf.pdfIn PDF document text
    • http://beviluxenumiliv.mywebcommunity.org/7661373506.pdfIn PDF document text
    • http://nextauto02.ru/dalamutenosaxpdtw.pdfIn PDF document text
    • http://espaceclient-cmb.com/xunotazitekagavuwa2p6u.pdfIn PDF document text
    • http://dimozakebaba.scienceontheweb.net/rabbit_digging_holes_in_yard.pdfIn PDF document text
    • http://vuwimoxit.mygamesonline.org/what_does_e4_mean_on_samsung_air_conditioner.pdfIn PDF document text
    • http://reduslim-eu.site/77876074310bz6nm.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443344/normal_60240a3c4adc4.pdfIn PDF document text
    • http://mavpa.fun/tepupobugiveve5cs98.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4500001/normal_5fee0073b5f3b.pdfIn PDF document text
    • https://cdn.sqhk.co/patagarinixa/fcNjjjm/26414865506.pdfIn PDF document text
    • http://vivekawiga.sportsontheweb.net/best_mythology_books_for_adults.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4462037/normal_6004885a2fede.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408190/normal_5ffa39fb316ab.pdfIn PDF document text
    • https://cdn.sqhk.co/jeforije/gjdc7gj/how_to_play_fall_race_3d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404310/normal_6024505488d2c.pdfIn PDF document text
    • https://cdn.sqhk.co/woxemumi/Xgd9hiJ/44653647305.pdfIn PDF document text
    • https://cdn.sqhk.co/gobopovupav/dhageia/guide_temple_oz_run_2_mod_apk.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/374affd8-ee69-481d-b6ed-86e766926866/brother_5450dn_toner_reset.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6e012fe7-d074-4155-aec0-2a255071e888/fetuwevozisitesufidijen.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f5fadd97-2846-469b-8d42-c2c4f8de02a6/html_css_javascript_resume_template_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/237cb1a8-c8c0-4a78-a126-639b61ecadd1/61196509272.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_off0000cf4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF4B 5140 bytes
SHA-256: f854beea4862d13b05c3f63885001f27b6df96f5709f24b8c782f191d8c8500e
font_01_sfnt_off0000e0cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0CF 10392 bytes
SHA-256: 80e574617df0f017cb643fd2b1fd90dafa48173cb83b3b9fff7273da42d159d3

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