Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9ce9870b48b4f4d…

MALICIOUS

PDF

76.2 KB Created: 2021-05-16 18:03:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: b1487b4dfe4f8280962e42b5b7d3f5a4 SHA-1: bc8ce0d05dc6da0ec0f3653ad125cf0bea609686 SHA-256: d9ce9870b48b4f4d918e47dc46d9e77066569da6dd38afe090a2d134699ccb4e
96 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The embedded URL points to a suspicious domain, likely used for phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to redirect the user to malicious content, potentially leveraging JavaScript for execution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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://jacksth.ru/strik?utm_term=what+is+the+monster+in+the+descent PDF link annotation
    • https://cdn.sqhk.co/dufubimaru/PhatG9x/lefut.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484115/normal_600b47d91a7d2.pdfIn PDF document text
    • https://cdn.sqhk.co/jinubodilev/hcWAi6P/45989640966.pdfIn PDF document text
    • https://cdn.sqhk.co/wakewafo/jighgRa/texide.pdfIn PDF document text
    • https://cdn.sqhk.co/durotula/idiahe5/52677022047.pdfIn PDF document text
    • https://cdn.sqhk.co/fudopalizew/Ahjjijc/ziramaxigexag.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365653/normal_606843b6a9ea5.pdfIn PDF document text
    • https://cdn.sqhk.co/xomatujod/AXjchcf/movistar_play_gratis_argentina.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412996/normal_5ffbaab0c4ad0.pdfIn PDF document text
    • http://theraisins.pro/wajajiwogazilaljnxay.pdfIn PDF document text
    • http://spindlndou.space/737_cockpit_companiontnj2z.pdfIn PDF document text
    • https://cdn.sqhk.co/velabolo/d81icL1/66993606233.pdfIn PDF document text
    • https://cdn.sqhk.co/wujugojuse/bd3euZk/28764863618.pdfIn PDF document text
    • http://about-central.com/75313527200lulb7.pdfIn PDF document text
    • https://cdn.sqhk.co/xurajalijok/7jgfS0O/vimajuxivuxolarif.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/7674f86e-7d37-43ad-a99b-e49197870803/chicco_keyfit_caddy_used.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b0fafe99-a793-43fe-ba5b-249f9bc5f715/vampire_diaries_cast_season_1_episode_11.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a9719443-bfb9-43e1-bb0f-e2436cc0a517/rinenabuwonoferejerusaf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1f0cb8c7-6a6e-46ec-aac2-e4438eefb3a4/how_to_charge_jackery.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8a5ac9f7-924e-4470-b910-c26d90383796/galevazoxosenogitate.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eda7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDA7 5160 bytes
SHA-256: a540f3f88be0d360a965063ae3625f492894aafba3bf1d84187086f825b6a82b
font_01_sfnt_off0000ff0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF0E 10840 bytes
SHA-256: 3fdf140c15d62aaf6baa0bff7f0c966d5f6b83358e167c86870294c1075f26c6

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