Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1e84a611b635ecc…

MALICIOUS

PDF

73.6 KB Created: 2021-04-14 14:55:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 9b71eba5d23aed3a70711580c663f8ea SHA-1: 8ae1be81da6d1619d477ca96a8422581b0b8cb8c SHA-256: d1e84a611b635ecc6a129deba185d6dd4b8fd643c3888c04d923a0b09dafc980
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, which is designed to lead the user to a phishing or malware distribution site. The document body, though heavily obfuscated, contains references to 'Juki ddl-5550n review' and 'wkhtmltopdf', suggesting a lure document. The ML classifier and ClamAV detection strongly indicate malicious intent.

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
  • 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://yafferge.ru/strik?utm_term=juki+ddl-5550n+review In PDF document text
    • http://dehydratedoriginalgoodness.com/which_country_gives_the_most_aid_to_africa9l2wt.pdfIn PDF document text
    • http://maleev.online/the_pillars_of_the_earth_full_movie_free_download3iyoh.pdfIn PDF document text
    • http://wrestling-mma.com/xudegeroga1mrzv.pdfIn PDF document text
    • http://newuwedeza.mypressonline.com/blood_bowl_2_vs_legendary_edition.pdfIn PDF document text
    • http://zoxuruje.sportsontheweb.net/analgesik_obat.pdfIn PDF document text
    • http://liko-sneakers.com/93599966707x79mc.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/fulosobezur/shell_casing_design_manual.pdfIn PDF document text
    • http://xupoputidug.rf.gd/metal_gear_solid_4_last_cutscene_length.pdfIn PDF document text
    • http://bozudob.epizy.com/41173107574.pdfIn PDF document text
    • https://s3.amazonaws.com/zaxawetawupo/av_comparatives_performance_test_2018.pdfIn PDF document text
    • http://mabalipa.epizy.com/ark_server_backups.pdfIn PDF document text
    • http://zemipajobo.rf.gd/88942949295.pdfIn PDF document text
    • https://s3.amazonaws.com/bugutaj/70352840801.pdfIn PDF document text
    • https://s3.amazonaws.com/mefadedosuw/niwufutixofilasuxor.pdfIn PDF document text
    • http://megoger.rf.gd/work_certificate_template.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_off0000e451.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE451 4932 bytes
SHA-256: 045d5a0083c3f044d0c26a13805b25fe80356b13fdd9d4da9beecd7df66002d7
font_01_sfnt_off0000f54f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF54F 10728 bytes
SHA-256: a2c58f62a5ebb62f29db30e0e7b6bc64052705fe6fad7fc4c08a9c2de0ccbf52

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