Malicious PDF — malware analysis report

Static analysis result for SHA-256 eefa5de1a51e973d…

MALICIOUS

PDF

69.5 KB Created: 2020-11-23 23:05:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 2b633cb9664ef3910582172230c13cdc SHA-1: b0171e224b5454cf70036c9ce90d87c0bc99538f SHA-256: eefa5de1a51e973d17559d0f995b8138cae014112afb028284df03ef5b396f6b
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

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
  • 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://cctraff.ru/strik?utm_term=empyrion+raumschiff+bauen In PDF document text
    • https://cdn-cms.f-static.net/uploads/4369503/normal_5fabaa8fdedb8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418556/normal_5f9a4c8160838.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368998/normal_5fa42b7a47ac0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465565/normal_5fbb705bbf854.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://uploads.strikinglycdn.com/files/78a2e13f-d02d-47e6-a58f-c6038c4b1d94/zekuzajagusa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fcdf9ad4-1240-48fb-961a-8efc55cbd453/49615269403.pdfIn PDF document text
    • https://s3.amazonaws.com/divexikav/74889929815.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e9053b96-8c3b-4691-9e60-78372d636dc1/cahier_de_vacances_3eme_vers_2nde_pd.pdfIn PDF document text
    • https://s3.amazonaws.com/fizaxo/elkhart_county_warrants_list.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b701934-8f77-4bf9-b910-c95f39b1989e/13th_age_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/05d1baa6-a2a5-40bf-b762-795a76b45cba/pekamalanavew.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b28255a7-587e-41a8-9210-bc805cfd97da/25604184123.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d8bb12e5-a2f1-49fd-9a2e-6d39e750fcec/poragon.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_off0000c18e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC18E 5224 bytes
SHA-256: b590250833f3b188b4acf40d0e339f6890b43b9e8de4a40cfb002d1736caa67e
font_01_sfnt_off0000d31e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD31E 11876 bytes
SHA-256: c354a465686f57f032bae65b587a3abcc443da3a407f7e967c8fa0797cdc86ab
font_02_sfnt_off0000f9a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9A7 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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