Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a523bc898d4876b…

MALICIOUS

PDF

107.1 KB Created: 2020-12-21 19:37:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: fc698f243fcc5bba4129133786a83ce5 SHA-1: 6a51effc8e4389b5e9bbbd113f75d19d70c32b05 SHA-256: 9a523bc898d4876bac1689574da525dcfab5208645453ee831c028fab92ac4bf
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://traffmen.ru/aws?utm_term=asma+ul+husna+malayalam+meaning+pdf'. This URL is likely used to redirect the user to a phishing or malware distribution site. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the presence of a malicious URL in a PDF is a strong indicator of a phishing or social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

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=asma+ul+husna+malayalam+meaning+pdf In PDF document text
    • https://static.s123-cdn-static.com/uploads/4489596/normal_5fcd0ca966457.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4496216/normal_5fccfbce6505b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470232/normal_5fa49620db8a1.pdfIn PDF document text
    • https://xalogajufuzuk.weebly.com/uploads/1/3/4/8/134885017/7495307.pdfIn PDF document text
    • https://bodupojuribun.weebly.com/uploads/1/3/4/7/134758420/4427145.pdfIn PDF document text
    • https://mevuponepom.weebly.com/uploads/1/3/4/8/134899748/1809685.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426676/normal_5f97cc6b37539.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470028/normal_5faffe02be7c0.pdfIn PDF document text
    • http://smc.org.in)MeeraRegularMeera2016SMC7.0.0+20171102HussainIn PDF document text
    • http://smc.org.inhttp://smc.org.inIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fdd37885b7bc966055e0d98/t/5fddc879459323513bbce1f2/1608370298311/central_florida_inshore_fishing_report.pdfIn PDF document text
    • https://s3.amazonaws.com/gewisetug/favusu.pdfIn PDF document text
    • https://s3.amazonaws.com/mozirolinitaje/70887900403.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
    • https://gitlab.com/smc/meera/blob/master/COPYINGIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off00011f4c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x11F4C 10392 bytes
SHA-256: 9f455acdbc5b77a97a853b56d405d4cfb539a8f6734602303a40f41f979ca11c
stream_007_off000169a8.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x169A8 29704 bytes
SHA-256: 25a05a1cc0508cba3ddc4d6dad15b37d6329ac28a9ae773318d3b3842e0dbe91
font_00_sfnt_off0001025a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1025A 2944 bytes
SHA-256: 95a5b71ad461af702de18db646c13b1c9fd01017ae751af4c53b67dc47a933f6
font_01_sfnt_off00010ce6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CE6 5452 bytes
SHA-256: 87f56d1a6a8beb5d6a9387f3ade48f7e2ce453736e72f8fe7c4d4a21259b9246
font_03_sfnt_off00014281.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14281 11552 bytes
SHA-256: 07f6d7c811c8369b6ee4e8d34ade71d5a3376f094e403e3ff7d7bf34dff23396

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