Malicious PDF — malware analysis report

Static analysis result for SHA-256 54c3ecfdccded0e3…

MALICIOUS

PDF

64.7 KB Created: 2020-12-14 02:17:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 01ac36d57573b412dda17d3b1a841898 SHA-1: 7009699870e6e417de86816398a72f33db91636f SHA-256: 54c3ecfdccded0e344ba55d8b27024b2cd57b84d27088d9ebb97dd495c8333f1
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document body contains garbled text but the presence of an external URI points to a malicious URL, likely intended to host a phishing page or download further malware. No scripts were extracted, but the PDF structure itself facilitated the embedding of the malicious URI.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://trafffi.ru/123?utm_term=what+type+of+cell+undergoes+meiosis PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4367279/normal_5fa2a8d986d2a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478123/normal_5fa75a3985bd4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc53a26a13a450bab10c448/t/5fcecd2f7cc0b10a0abe5850/1607388463616/here_go_hell_come.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0c8ce6d1-428e-48e1-b48c-792facd9c355/lego_movies_list.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/217d1f44-f80f-449b-a7c6-025c0fe17bb8/15342130922.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fd7c1c9b-2e8b-4ea6-a5e5-9179691f22df/how_to_plot_inequalities_in_mathematica.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/354c4ce8-f4a1-4e9b-9ecd-19d6a50edd57/marvel_spider_man_game_download_for_pc_rg_mechanics.pdfIn PDF document text
    • https://s3.amazonaws.com/tinivukedeta/sairat_movie_full_hd.pdfIn PDF document text
    • https://s3.amazonaws.com/jijari/85089137712.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/528ac0cc-fba3-4e86-981f-0b11a97bfeb0/99814343224.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f7e68515-f9d0-4f5f-987d-dc3a96f76aaa/27861060937.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c93b1776-febf-4cc1-903a-0e2016f564f6/6984248302.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/81459005-7246-4f97-8eca-c50bf68618f5/bevafevewe.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_off0000bffc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBFFC 5684 bytes
SHA-256: 46be081076a71b351bafd7931e8a188816c619ec7545726965ec64062bc8b684
font_01_sfnt_off0000d341.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD341 10064 bytes
SHA-256: c52ae2caae51ad75d279628a9bd5d1956766ac5a27a22f919385b65732cb7328

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