Malicious PDF — malware analysis report

Static analysis result for SHA-256 0984f2c41ed2bbe6…

MALICIOUS

PDF

79.9 KB Created: 2021-01-31 04:08:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 8c397b45698b812ff1f495461175e670 SHA-1: dd1594f556e7bb29311a6f0059d99f73c9770672 SHA-256: 0984f2c41ed2bbe6991d275b25f8c1486aefd1f2d16928ddbd5c66e1106b9dd5
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which point to potentially malicious or phishing sites, as indicated by the PDF_SEO_LINK_FARM heuristic. The ML classifier and ClamAV also flagged this file as malicious, specifically as a phishing trojan. The embedded URLs suggest an attempt to redirect users to download malicious content or engage in phishing activities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://trafftec.ru/wb?keyword=aka%20to%20blue%20apk%20patched PDF link annotation
    • https://tojaxufuvubugo.weebly.com/uploads/1/3/4/6/134641466/xumag-riremekujoxu-navipapabiki-gesivaxop.pdfIn PDF document text
    • https://cdn.sqhk.co/pimepojuti/beKhgje/azarenka_vs_osaka_cincinnati.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411916/normal_5ff285df3369d.pdfIn PDF document text
    • https://nozijuga.weebly.com/uploads/1/3/4/6/134698325/b073c1c7c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481061/normal_5ff0444f209da.pdfIn PDF document text
    • http://bawoputameded.iblogger.org/embed_power_bi_report_in_sharepoint_2013.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419832/normal_6012f9f2cd27f.pdfIn PDF document text
    • http://wujumelugesebem.22web.org/8191119583.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471109/normal_600b12281a398.pdfIn PDF document text
    • https://fabuxitewuf.weebly.com/uploads/1/3/4/3/134349615/lefapebutojivaguta.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/panokojol/baroque_period_music_worksheets.pdfIn PDF document text
    • http://nasukenapab.epizy.com/zapamufanoloj.pdfIn PDF document text
    • https://s3.amazonaws.com/levumoduf/retarixajilafuwipejiru.pdfIn PDF document text
    • https://s3.amazonaws.com/farokof/reformas_borbonicas_administrativas_consecuencias.pdfIn PDF document text
    • http://naxokagad.epizy.com/jakezoxugodef.pdfIn PDF document text
    • https://s3.amazonaws.com/varolexexus/darkstalkers_resurrection_ps3_trophy_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/tejuvonixag/who_viewed_my_profile_apk_2018.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_off0000e01a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE01A 4408 bytes
SHA-256: be2004c9904096e9419d22048a0764e9fae5950b5a561034dea29df6a9c8d53e
font_01_sfnt_off0000efae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFAE 5080 bytes
SHA-256: 89625bc26f3cbb9d1e8a54e83ee1325256a32fbf7b8b49087d32e0be1054fa2f
font_02_sfnt_off000100f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100F3 16148 bytes
SHA-256: 6762afad51cb9bbe602742664732c5b1f650084fe7c27332ebf9123fd1add9e9

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