Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8a99eb34695a3bf…

MALICIOUS

PDF

91.6 KB Created: 2021-02-10 20:01:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 27c90d6333b2db59cb422b6f29bd8912 SHA-1: d7ea583db4ba84548f8926e53e8caef775f508e0 SHA-256: f8a99eb34695a3bf99e2bcf9e33dd1fce0b42aa941c957d78a65e17a95a5db4d
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. It contains an embedded URI pointing to 'https://seumenha.ru/123?utm_term=class+struggle+in+africa+kwame+nkrumah+analysis', suggesting a phishing or redirection attempt. While no scripts were explicitly extracted, the PDF structure and embedded URIs are consistent with phishing lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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://seumenha.ru/123?utm_term=class+struggle+in+africa+kwame+nkrumah+analysis PDF link annotation
    • https://cdn.sqhk.co/kesusevuzep/jegeMij/t-_mobile_familymode_home_base_review.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4461245/normal_5ff26129aecad.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413108/normal_5ff0344c17d4f.pdfIn PDF document text
    • https://cdn.sqhk.co/girasufu/jigjehi/smart_watches_android_near_me.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424347/normal_5fe1198445987.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455403/normal_5ff9269630229.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393752/normal_5fdba3f570aed.pdfIn PDF document text
    • https://cdn.sqhk.co/nixafusoda/JthgQpQ/66831019614.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379964/normal_5fc7d1c24dddc.pdfIn PDF document text
    • https://cdn.sqhk.co/kokijunuxagi/ja1ijgj/forgotten_hill_mementoes_walkthrough.pdfIn PDF document text
    • https://cdn.sqhk.co/latipizi/gi3tkhe/fastlane_road_to_revenge_hack_mod_apk.pdfIn PDF document text
    • http://sefajoga.iblogger.org/campaign_bumper_sticker_template.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423750/normal_5fdbfe56268ed.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393785/normal_5fe41ce7838fa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn 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_off000118ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118ED 6588 bytes
SHA-256: 4e1a9c4cb32f1bc4ff176ae4dc1460c31b2d267bf2def0252f23ad2731e7be72
font_01_sfnt_off00012966.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12966 5456 bytes
SHA-256: 3491fe9e15cbfd3dfd865f7f92e7ff85ff4daa678cc49882c15ee65f853d58af
font_02_sfnt_off00013be3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13BE3 10728 bytes
SHA-256: 7f13cb9ccc0138ea83c29739ae7c6374189fa15f3231ba4082b12cabea43ad73

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