Malicious PDF — malware analysis report

Static analysis result for SHA-256 9861b8e15bd926fa…

MALICIOUS

PDF

78.1 KB Created: 2021-02-27 04:04:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: b7c9c475bf601bf435087b7e2e3a54e0 SHA-1: c4b553781c240827afcf8c78dd5ca39ff8edcc3b SHA-256: 9861b8e15bd926fac515564b74b6b7b8191a6067ef92febb406b448bd189a9da
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 dafemum.ru. This URL is presented in the document body, suggesting a phishing or scam attempt to trick the user into visiting a malicious site. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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/award?keyword=sig+sauer+p229+elite+holster In PDF document text
    • https://cdn.sqhk.co/vekosozob/iehbKhj/knifeless_tape_lowes.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/jawusawar/smart_board_projector_troubleshooting.pdfIn PDF document text
    • https://s3.amazonaws.com/jadudusujuje/pufiguwadarorusuga.pdfIn PDF document text
    • http://silapopo.epizy.com/aha_stroke_guideline_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/vipinib/android_tv_netflix_not_working.pdfIn PDF document text
    • https://s3.amazonaws.com/zerejibixupav/this_is_amazing_grace_chords_guitar.pdfIn PDF document text
    • https://s3.amazonaws.com/fotepopunaj/39506286212.pdfIn PDF document text
    • https://s3.amazonaws.com/zagapaxa/mibevavufelig.pdfIn PDF document text
    • http://xodolipifonabo.epizy.com/mibalemigamid.pdfIn PDF document text
    • https://s3.amazonaws.com/risisipajole/aidin_salih_gerek_tp_indir.pdfIn PDF document text
    • https://s3.amazonaws.com/gatazeromij/answers_of_menschen_arbeitsbuch_a1._2.pdfIn PDF document text
    • http://mesesoriran.epizy.com/2019_canada_elections_platforms.pdfIn PDF document text
    • https://s3.amazonaws.com/xasovewipeje/43454482295.pdfIn PDF document text
    • http://bekokapag.rf.gd/boschhammer_pbh_2100_re_test.pdfIn PDF document text
    • http://balazetesu.epizy.com/dmaic_template_word.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_off0000e8da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8DA 5248 bytes
SHA-256: e7d7fa1cedc67e327fbdcc7cde31ac1973952d7d2d70b68e694ea561393de7e6
font_01_sfnt_off0000fac1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAC1 10016 bytes
SHA-256: c58dddbbd75bcaf337674e1113ed7f9a0142faef979a6cfc5f0b84c0e4ac83d1
font_02_sfnt_off00011d22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D22 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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