Malicious PDF — malware analysis report

Static analysis result for SHA-256 d4218e96c20e62c7…

MALICIOUS

PDF

75.0 KB Created: 2021-02-07 09:59:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: dd343c48c3e103451a88bd6d4f400d44 SHA-1: c27071229efaa3f9c3e63b649539a3f3f7141af6 SHA-256: d4218e96c20e62c7f47390e0739e4df9683206a21650411f5eee1c0b13089ab6
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 a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly support its malicious nature. Although no scripts were extracted, the presence of embedded URLs and the document's metadata suggest it is designed to trick users into visiting malicious sites.

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/aws?utm_term=attune+nxt+performance+test In PDF document text
    • http://faxozulakevosos.iblogger.org/kifomad.pdfIn PDF document text
    • http://bitcoinlearningcentre.online/redskins_scores_2019xppt5.pdfIn PDF document text
    • https://cdn.sqhk.co/lodikorep/z8nFZib/mozuvesewarata.pdfIn PDF document text
    • http://okclub.org/blank_calendar_template_cutew4c2t.pdfIn PDF document text
    • https://cdn.sqhk.co/mibajufaneja/haYkBkt/theme_for_oneplus_7t_pro_cases.pdfIn PDF document text
    • http://merishwheelrecords.com/pixel_battle_royale_games_downloadknflf.pdfIn PDF document text
    • http://topfrag.rip/alphabet_sounds_flashcardsxdlha.pdfIn PDF document text
    • https://cdn.sqhk.co/buxifuludo/Fhihdja/nick_cordero_blue_bloods_actor.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/mefadedosuw/6479965342.pdfIn PDF document text
    • https://s3.amazonaws.com/lerezazo/pumubuxubupivedofem.pdfIn PDF document text
    • https://s3.amazonaws.com/jevelel/15269420137.pdfIn PDF document text
    • https://s3.amazonaws.com/pirosisob/choosing_a_medigap_policy_guide_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/zunaduxa/archicad_12_software_free.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_off0000e97f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE97F 5188 bytes
SHA-256: 92cf4266159a8c558529a9eaa2e987a0821adf167b71d44e8ec4d27cf3eb3619
font_01_sfnt_off0000fb10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB10 10596 bytes
SHA-256: c2f1c76e0cad5493b586e1fe599aefe8c5ab6e289c693db79e2c478792fbb442

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