Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3135cb0c834030a…

MALICIOUS

PDF

68.2 KB Created: 2021-02-24 17:13:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: 10d0d4072d5d57b51f95d13952689c1f SHA-1: e6697219af343277436ca068fd60af18ff3f7386 SHA-256: f3135cb0c834030a1c730dec5cd08399bb83cd774da92b1d865b2a7b962188a5
156 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with one prominent link pointing to a URL that mimics search results for a popular TV show. This suggests a phishing or malware distribution attempt. ClamAV and ML classifiers also flagged the file as malicious, indicating a high likelihood of malicious intent. No scripts were extracted, but the structure and embedded URLs strongly suggest a lure to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://maypoin.ru/wb?keyword=the%20magicians%20season%204%20episode%201%20plot PDF link annotation
    • http://fisareboveda.getenjoyment.net/how_to_administer_the_ssi-4.pdfIn PDF document text
    • http://dumubemajizukov.medianewsonline.com/sat_practice_test_7_answer_sheet.pdfIn PDF document text
    • https://fuxiwajusefu.weebly.com/uploads/1/3/4/6/134617271/torebibe_lekexipafip_dotopoji_suzajonet.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402501/normal_5feb780af1270.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475728/normal_60173736be4f0.pdfIn PDF document text
    • http://bomawowaziwan.iblogger.org/54235326698.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368991/normal_602d3a3312de2.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://s3.amazonaws.com/nokiva/nugofozeg.pdfIn PDF document text
    • http://rananutoto.epizy.com/guidelines_antithrombotic_therapy.pdfIn PDF document text
    • https://s3.amazonaws.com/wofaxil/abhimaan_movie_song_pagalworld.pdfIn PDF document text
    • https://s3.amazonaws.com/zuponefi/33572421247.pdfIn PDF document text
    • http://manosotidokef.myartsonline.com/lutodapalewagiworol.pdfIn PDF document text
    • https://s3.amazonaws.com/rurosaveruk/cimatron_e12_crack_free.pdfIn PDF document text
    • https://s3.amazonaws.com/roware/bollywood_movies_hd_for_mobile.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_off0000c234.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC234 5268 bytes
SHA-256: fc753c9af0f8d653aa1979d704a0ab8eb53a6c13a0e1d1b97a79e6e535ee9182
font_01_sfnt_off0000d3ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3FF 9844 bytes
SHA-256: cf32dea79c6fe4d3c0617f1262ac2ab1698bce2d52cf3467586c0864182ca082
font_02_sfnt_off0000f577.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF577 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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