Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1da8e87ddc1a221…

MALICIOUS

PDF

100.4 KB Created: 2020-11-24 08:50:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 5f2322f5e27f2049aeb7e23cccd459ef SHA-1: eb90ca36f2b1ca50fe221194d2df2acd64168314 SHA-256: e1da8e87ddc1a221241a5c186a5c69c50c1ea6c093bab4b7005bf664584e8549
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains an embedded URL that directs users to a suspicious domain, likely for phishing or malware distribution. Heuristics and ClamAV detection confirm its malicious nature, classifying it as a phishing trojan. The document body, though heavily obfuscated, suggests a lure related to 'Digestion y absorcion de carbohidrat'.

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://traffnew.ru/strik?utm_term=digestion+y+absorcion+de+carbohidrat PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4414688/normal_5fbb7afe9fd6a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365646/normal_5f93dbb7ebe20.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388048/normal_5f995ef92a215.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383572/normal_5f925de7aafa3.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/a9b1a7da-2b50-4ad6-8f61-92d93a255fa7/red_queen_grenade.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/df008ed2-f07e-44f6-b90c-65f896d48d56/pokemon_delta_emerald_rom.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/635f0113-7bff-4ce7-8ac0-7e3e41fcbf80/21537927949.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9b51320b-81f7-4861-8a66-e822994d1da8/lubifuwifuwano.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6bcd4dc4-71bb-4017-8228-a0af53da69d0/installer_google_chrome_sur_freebox_revolution.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/12b6c1a5-4adf-491b-ad56-50bc999d8885/organometallic_chemistry.pdfIn PDF document text
    • https://s3.amazonaws.com/poresi/how_to_money_hack_smashy_roads_wanted.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9712112e-f5e7-4f66-aff9-62dabb98188a/vuratoburakewafufe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d263cf5d-afe6-4ad8-a6f5-a411ede0b105/fekumunitaw.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_off00013bd7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13BD7 5196 bytes
SHA-256: e5f404831773d249464c57a1968351b6a88e10058aa31b43264bec3d1d95cc71
font_01_sfnt_off00014d79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14D79 11928 bytes
SHA-256: 27a13b996bef4ba34dbcb476e91b91f2dad0cd0da37b8677d7ae86944f9c17df
font_02_sfnt_off00017456.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17456 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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