Malicious PDF — malware analysis report

Static analysis result for SHA-256 275c64804d4b3c81…

MALICIOUS

PDF

78.0 KB Created: 2021-02-28 10:16:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 9552928c9a34567525ece0d60508bb14 SHA-1: e72415c4e62afe3be5330675ffd111e8b83885ca SHA-256: 275c64804d4b3c819916715fa57530df4e05fc512c8dc165a23744798bbd3356
96 Risk Score

Malware Insights

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

The PDF document contains an embedded URL that redirects to a site seemingly related to tattoo artist applications, likely a phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan. While no scripts were explicitly extracted, the presence of numerous embedded URLs suggests a downloader or redirector functionality, potentially leveraging PDF's scripting capabilities.

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
  • 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://xajibur.ru/123?utm_term=what+apps+do+tattoo+artists+use PDF link annotation
    • https://cdn.sqhk.co/wujozuzewed/hjGIZgc/stick_run_hack_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/duxadikoti/hc2yklU/81684586642.pdfIn PDF document text
    • https://cdn.sqhk.co/bodavadu/gWGgcjd/ol_chiki_download.pdfIn PDF document text
    • http://dirujadejefogax.iblogger.org/topimisuvujosexo.pdfIn PDF document text
    • https://cdn.sqhk.co/wudawagirus/4haTABE/fizuvev.pdfIn PDF document text
    • http://fito4ka.xyz/online_video_calling_apps1ipsz.pdfIn PDF document text
    • https://cdn.sqhk.co/vimewiki/hBThawW/tidototujote.pdfIn PDF document text
    • https://cdn.sqhk.co/lebogomatoze/jcSdggo/95345449565.pdfIn PDF document text
    • https://cdn.sqhk.co/sakupiraf/jbhdijZ/76507586537.pdfIn PDF document text
    • https://cdn.sqhk.co/fofasafiwi/SeeAkFy/bubajamug.pdfIn PDF document text
    • https://cdn.sqhk.co/xotosobupis/hheRPii/17524689255.pdfIn PDF document text
    • https://cdn.sqhk.co/vubiwete/bhbjjsy/collect_coins_in_featured_creative_islands_not_working.pdfIn PDF document text
    • http://my-favshopg.online/glencoe_health_book_chapter_24_answersl3161.pdfIn PDF document text
    • https://cdn.sqhk.co/solijisivono/LgjUpQ1/lugutipubowexexaka.pdfIn PDF document text
    • https://cdn.sqhk.co/xukerejolar/hawCZF6/56096694762.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://parepakikil.epizy.com/application_x-_www-_form-_urlencoded_java_constant.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_off0000f51d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF51D 5028 bytes
SHA-256: cabe8236a28bd8181f6699a046eeb010156b6d6ed3b869c2b3a435e717723362
font_01_sfnt_off0001063c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1063C 10828 bytes
SHA-256: f9bc265950d3fa958fe4f215a6f3bdd1c5b34173dc297ed349b94af220529ae2

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