Malicious PDF — malware analysis report

Static analysis result for SHA-256 302a9187382b9c5e…

MALICIOUS

PDF

73.3 KB Created: 2021-04-22 09:20:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 8da093d459bf4fd5744ab0bf4139290c SHA-1: 3802ee618c80f7d1f7f96359327f51466ed18567 SHA-256: 302a9187382b9c5e29d82137f965bdde3cb323a6756136e4cf8576d3f7eb0aa2
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with one specifically pointing to a suspicious domain ('jacksth.ru') that is flagged as an external URI. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan. The document body, though heavily obfuscated, appears to be a lure related to technical support or repair guides, a common tactic for social engineering.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://jacksth.ru/strik?utm_term=how+to+fix+broken+hinge+on+dell+laptop PDF link annotation
    • http://cleaner360.shop/1317489368kncxt.pdfIn PDF document text
    • http://2gusevshop.space/22965590981nqib2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392210/normal_606425b5df1f7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490138/normal_605fe112bff93.pdfIn PDF document text
    • http://fredo.run/nemabeg66dkg.pdfIn PDF document text
    • http://getplafond.xyz/exsultate_jubilate_sheet_musicukiw5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421969/normal_605459450dd2b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/8e43c30c-7fcd-4094-b506-358982da52ba/how_to_reset_i500_tws_airpods.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/edcbdf37-160b-460e-a10f-13c7d3fd732f/in_christ_alone_hymn_lyrics.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/978ad643-635e-450e-b3f0-5193818fda1c/29792019061.pdfIn PDF document text
    • http://zepibugab.rf.gd/biology_notes_for_neet_exam.pdfIn PDF document text
    • http://disetorabagubed.epizy.com/selamaxeretowi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/013d5061-f054-484a-bbbf-e9f5f838c569/how_to_use_prince_lionheart_ultimate_wipe_warmer.pdfIn PDF document text
    • http://lugorazezeg.rf.gd/35536292459.pdfIn PDF document text
    • http://pilakapusew.epizy.com/27796964287.pdfIn PDF document text
    • http://buxamojajowolos.rf.gd/advantages_and_disadvantages_of_pneumatic_systems.pdfIn PDF document text
    • http://zanerem.rf.gd/23425189145.pdfIn PDF document text
    • http://movafomuwexowix.epizy.com/bifarezebizanerugamav.pdfIn PDF document text
    • http://bijiwamosijiw.epizy.com/mobilcom_debitel_vertrag_kndigen_vorlage.pdfIn PDF document text
    • http://punemipira.epizy.com/bisorisulam.pdfIn PDF document text
    • http://verejepaw.epizy.com/28343156062.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a3137804-585c-42fe-8523-4d0645480f16/tabumumexanikebiwep.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_off0000dfaa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFAA 5452 bytes
SHA-256: 95277e677b7a10ac448cf4412c80c4e09b48bc967931251e46c0a5867437f189
font_01_sfnt_off0000f243.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF243 10968 bytes
SHA-256: 612befbb7695aa09680c32951f1967ef5bf1ecfed8d6a9d06a9d17bd5c0bebc0

Open this report in the interactive analyzer, or submit your own file for analysis.