Malicious PDF — malware analysis report

Static analysis result for SHA-256 56755d0a5a4acee8…

MALICIOUS

PDF

72.7 KB Created: 2021-01-16 06:07:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 69cfc7e5bd09dee4fe44d47d2c8db5df SHA-1: d83a1c6fa441e227434f43d74ac52bc01df4600f SHA-256: 56755d0a5a4acee8f77892446e5ddbed8b3b72be6ee097af289afa2e56c254e4
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, which is a common tactic for phishing and malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, suggests a lure related to a certificate, likely to trick users into clicking the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://gettraff.ru/123?utm_term=baby+dedication+certificate+pdf In PDF document text
    • https://site-1171689.mozfiles.com/files/1171689/the_triple_entente_before_ww1.pdfIn PDF document text
    • https://cdn.sqhk.co/wapogade/31aih9v/49116426131.pdfIn PDF document text
    • https://cdn.sqhk.co/vamunidibu/geBfABX/5873669348.pdfIn PDF document text
    • https://vuzaruluweketex.weebly.com/uploads/1/3/4/4/134478477/7815991.pdfIn PDF document text
    • https://site-1172046.mozfiles.com/files/1172046/rarakix.pdfIn PDF document text
    • https://site-1174930.mozfiles.com/files/1174930/argentine_football_league_schedule.pdfIn PDF document text
    • https://cdn.sqhk.co/wesurewilo/dNgi0oK/babaf.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/felasorarabipis/17375285305.pdfIn PDF document text
    • https://s3.amazonaws.com/kudowo/fontello_cheat_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/juliziwojatige/19954102153.pdfIn PDF document text
    • https://s3.amazonaws.com/sifawekujiki/unlock_your_hip_flexors_dvd.pdfIn PDF document text
    • https://s3.amazonaws.com/nimuwet/vasofukuzuxumupe.pdfIn PDF document text
    • https://s3.amazonaws.com/tunenijexe/xevixakopajubezomujuk.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d292.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD292 5020 bytes
SHA-256: 7a5cd06339fc8b036af05cfd6ffe9985bb7ea8665752a1c853532534f7f6c048
font_01_sfnt_off0000e3a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3A8 10440 bytes
SHA-256: b115f0f7443714b606819064be5a6b245d01f28eed625a793cb72b0c795a6472
font_02_sfnt_off00010660.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10660 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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