Malicious PDF — malware analysis report

Static analysis result for SHA-256 398f49e016a78b96…

MALICIOUS

PDF

82.5 KB Created: 2021-01-08 17:09:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: bfb207770fcac871872c1b68ab8fa4a7 SHA-1: 8b1a0124ba11be55b0e09e1d688b7775c61f9550 SHA-256: 398f49e016a78b9630b8d5cb1649510215b9c95ab466e1669a6d312dc19fe5ad
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 embedded URL is the primary indicator of compromise, likely leading to a phishing page or a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://traffmen.ru/aws?utm_term=attendance+sheet+in+excel+for+office In PDF document text
    • https://cdn.sqhk.co/ditetona/ZbGge9D/my_talking_ginger_game_free_download.pdfIn PDF document text
    • https://cdn.sqhk.co/xasomegupur/huWhh3m/keretodologonakagunawafi.pdfIn PDF document text
    • https://lafuworopiraw.weebly.com/uploads/1/3/4/3/134341657/bisadukase.pdfIn PDF document text
    • https://cdn.sqhk.co/rusefijow/crhjeoI/gogo_live_twitter_2020.pdfIn PDF document text
    • https://sivivaleretuvu.weebly.com/uploads/1/3/4/3/134324596/dudipu-lezamute-dikosimu-vomozusebo.pdfIn PDF document text
    • https://xumebarukez.weebly.com/uploads/1/3/4/6/134687090/7329385.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/4300c2a6-8c41-4342-9808-3b08924c8e9f/46817775985.pdfIn PDF document text
    • https://s3.amazonaws.com/lixuduwonifa/14331859517.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/90d78903-d57e-4108-85d4-e402692c4ab7/businessman_tamil_movie_hindi_dubbed.pdfIn PDF document text
    • https://s3.amazonaws.com/sezutuma/national_sorority_of_phi_delta_kappa_symbols.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA75 5164 bytes
SHA-256: cb07f0b8290ca5c4df2e1fd86b7a1b3fa50f54f1c9acc21e7eef007c54661139
font_01_sfnt_off0000fc00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC00 1596 bytes
SHA-256: 1ca19e58de121a7afe266b3a1fd7625653a603008b535b21c8d9c7e0093fc485
font_02_sfnt_off00010422.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10422 10136 bytes
SHA-256: 4d482f461fb12968390f16e9aac33eb8c07a193283e7d1ad7dbab55e47a2ab0d
font_03_sfnt_off0001270a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1270A 16144 bytes
SHA-256: 2a5f1667c2e343500efde63e3dd6a136498333968b1680966ac5eb34589f1174

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