Malicious PDF — malware analysis report

Static analysis result for SHA-256 73c7af7641b34642…

MALICIOUS

PDF

83.5 KB Created: 2021-03-11 07:54:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 94408f6ec550a7612c6635d68eb6a247 SHA-1: e5ad5ed7b8903556dafa6a67b26c6c6028e1c135 SHA-256: 73c7af7641b346427b9f8e9c05d65bae5e7f710d51b2f1c963e0e212e6d6849d
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains an embedded URI pointing to a suspicious domain, likely intended to deliver a secondary payload or redirect the user to a phishing site. The document body, though heavily obfuscated, suggests a lure related to 'Hot springs grandee cover dimensions'. No scripts were extracted, but the presence of embedded URLs and the overall detection profile strongly suggest a malicious intent to trick the user into visiting a compromised site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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://dugedepap.ru/strik?utm_term=hot+springs+grandee+cover+dimensions PDF link annotation
    • http://munasimowijuxi.getenjoyment.net/96469191038.pdfIn PDF document text
    • http://labifovejes.mypressonline.com/creative_writing_prompts_for_4th_grade.pdfIn PDF document text
    • http://libuwapuvewipev.mywebcommunity.org/bibavanonojeme.pdfIn PDF document text
    • http://trenolgia.buzz/xovubetonizuv0mvv8.pdfIn PDF document text
    • http://sukutoxuwurif.mywebcommunity.org/73862453427.pdfIn PDF document text
    • http://quinzsy-studio.design/26457539697e8koh.pdfIn PDF document text
    • http://worelimupuvefam.mywebcommunity.org/low_back_pain_rehabilitation_exercises.pdfIn PDF document text
    • http://sagaguzasonip.iblogger.org/dell_precision_m4500.pdfIn PDF document text
    • http://junumidutuzakox.getenjoyment.net/la_crosse_technology_bc700-cbp_alpha_power_battery_charger.pdfIn PDF document text
    • http://xogunajeraxuda.mywebcommunity.org/mary_shelleys_frankenstein_movie_ending.pdfIn PDF document text
    • http://ecoservice-vlad.ru/river_road_animal_hospital_niskayuna_nykqxqq.pdfIn PDF document text
    • http://delinapod.mypressonline.com/tibizipobebos.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://forozilixoder.rf.gd/79001277503.pdfIn PDF document text
    • http://samesesodore.onlinewebshop.net/lebimupixakazigevomuxuj.pdfIn PDF document text
    • https://s3.amazonaws.com/vazisi/51931128800.pdfIn PDF document text
    • https://s3.amazonaws.com/nuselufuzo/browsec_for_opera.pdfIn PDF document text
    • https://d102a0f2-001f-4998-bb0a-88ac30ac05b5.filesusr.com/ugd/771ea4_16bb4907f8704255b3fa3b5e81a69ee0.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wukevirenesu/44500226347.pdfIn PDF document text
    • https://s3.amazonaws.com/widofafane/12223445503.pdfIn PDF document text
    • https://s3.amazonaws.com/zemunomipazikez/before_the_flood_moviesheets._com.pdfIn PDF document text
    • https://ea74ff18-003d-4094-8454-8d7e15e33abb.filesusr.com/ugd/50de67_30943e6395c04a2489ef413b442f1bdc.pdf?index=trueIn 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_off000107a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107A6 5380 bytes
SHA-256: bc72b6bd42f840cb772b1153fd18a8140755282eaca2e9515e9a3a41e3ad5739
font_01_sfnt_off000119e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119E3 11572 bytes
SHA-256: a21dd7cda0c8ae8aff3d8221e90de372abed819aa168a9f7c549d99eeb147c16

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