Malicious PDF — malware analysis report

Static analysis result for SHA-256 cecc8e6df296f0a4…

MALICIOUS

PDF

75.2 KB Created: 2021-02-20 02:47:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: d45f1db42a565a243e56bbdac19ec243 SHA-1: 99660736ec033c9ee15216b9ebac4cd0545e1516 SHA-256: cecc8e6df296f0a46e4782b7889b9332ac424ef7747959a4dc4c9d98153623d4
96 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains an external URI pointing to 'seumenha.ru', which is likely used to deliver a malicious payload or redirect the user to a phishing site. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to exploit user trust, possibly through social engineering related to salary information.

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
  • 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=salary+of+a+health+and+safety+officer+in+south+africa PDF link annotation
    • http://tosety.xyz/blackmagic_atem_mini_software_updatepc6g3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419630/normal_5fd7c0c00273e.pdfIn PDF document text
    • https://cdn.sqhk.co/jabosuve/cU4ieBC/hello_live_chat_app_download.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426425/normal_5fcaef8c27c61.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4487662/normal_5fc5ecd6343c6.pdfIn PDF document text
    • http://form-lnstagramcopyrightservices.com/x_banner_mockup_psd_freeo5b4u.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383797/normal_60174e0d305c5.pdfIn PDF document text
    • http://profaudit32.ru/89686801582z53ib.pdfIn PDF document text
    • https://cdn.sqhk.co/zojixemem/gjLhdjh/french_nursery_rhymes_songs_lyrics.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369329/normal_5ff07bb1da8b9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375515/normal_5fd18b055d51d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382790/normal_5ff8c96b00eba.pdfIn PDF document text
    • http://triple-doska4.club/zombie_survival_guide9q5fg.pdfIn PDF document text
    • http://curvepreloved.com/what_age_is_the_book_twilight_appropriate_forumnyj.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409258/normal_5fee4f618b268.pdfIn PDF document text
    • https://cdn.sqhk.co/fegadosijete/0Z4jaia/renefifuju.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375195/normal_5fd8cb56d380d.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
    • 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_off0000db3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB3D 5196 bytes
SHA-256: acd2a648ec8291d3ef4df064a7b73f284b2cf5f625b5de9d39cd69027fee9cc8
font_01_sfnt_off0000ecd8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECD8 10636 bytes
SHA-256: d39587146242b48f49bd05537fe7d97090a37e2bfd9f8cfe5be7280b58e720e6
font_02_sfnt_off00011143.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11143 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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