Malicious PDF — malware analysis report

Static analysis result for SHA-256 13164e1fc348c7d0…

MALICIOUS

PDF

222.8 KB Created: 2021-03-07 14:55:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 0b35c2e60257985aa057d3cc5a5f4b0f SHA-1: 789c6db682ef353983f333341412ae829d1f8d17 SHA-256: 13164e1fc348c7d09839ea6e54c963f182f143945eb2ac56a41eebd33aa88ace
154 Risk Score

Malware Insights

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

The PDF contains a link that redirects to a known malicious domain, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The ML classifier also flagged the PDF with high confidence. The document body, though heavily obfuscated, contains text related to the URL's query parameter, suggesting a phishing lure. No scripts were extracted, but the presence of a malicious redirector indicates an attempt to lead the user to a harmful site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9941

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://dafemum.ru/123?utm_term=what+is+chinese+literature+all+about In PDF document text
    • http://verification-help.business/joxizitisepapf44xr.pdfIn PDF document text
    • http://appless.space/52947322309lkhby.pdfIn PDF document text
    • https://kavikazu.weebly.com/uploads/1/3/5/3/135392310/5843329.pdfIn PDF document text
    • http://kleomaften.online/dioses_y_heroes_de_la_mitologia_griega_shuae3vya.pdfIn PDF document text
    • http://civiliscmq.online/nameredaxedetuwurm74zf.pdfIn PDF document text
    • http://missunik.space/34177810200rn2ek.pdfIn PDF document text
    • http://ital-tess.space/ligixebagar30bm.pdfIn PDF document text
    • http://podarokinsta365.site/resnick_and_halliday_kranexrzlq.pdfIn PDF document text
    • http://form-lnstagramverificationbadge.com/matematicas_6_primaria_santillana_pdcpn5o.pdfIn PDF document text
    • http://lotsmen.com/android_version_oreo_mobilesurqqj.pdfIn PDF document text
    • https://mozipode.weebly.com/uploads/1/3/1/4/131437967/guzeg.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/jivuxo/nafosobexalobetowoke.pdfIn PDF document text
    • https://s3.amazonaws.com/pusolefosex/61006838418.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/188553ef-7a0d-4d17-8522-3c3879cc538f/76949726441.pdfIn PDF document text
    • https://s3.amazonaws.com/mejobu/ramikenoxazipuri.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9ce14033-4308-488f-a54e-adca5a0bfeed/xinokifujaronuzesof.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/be892fb0-6437-4702-9299-0f1a78cd25f3/navpers_1070_6_division_officer.pdfIn PDF document text
    • https://s3.amazonaws.com/wegemebufojafak/baaghi_movie_song_ringtone_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b8f35053-be9d-4b65-b374-9e2f5badeb6f/xukanageloji.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4cd97936-c4d7-4906-a7fc-69a43b8a14d4/who_are_marginalized_communities.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001d35b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D35B 113936 bytes
SHA-256: 14f09ee5b503f6e56f9a9ca881f07c54e5bcb907bd22d72b8ed1e6c829eccb42
font_01_sfnt_off00032176.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x32176 4924 bytes
SHA-256: f2c519d830672c8b4130f613c565f76f93562cea1ee449f30b93f6dd2d2d7e1e
font_02_sfnt_off00033220.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x33220 15592 bytes
SHA-256: eef884ba86fdd0e6a76d2e110afcc953647e24c7e340f595198cf55c087ca3ab
font_03_sfnt_off00035ead.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x35EAD 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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