Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a64239d61ca2783…

MALICIOUS

PDF

82.7 KB Created: 2021-03-18 14:39:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 424a9b817f32b9c7372908c1c25f9e86 SHA-1: f4f453aa01dfe2dcab21f1b819532659bd5613c0 SHA-256: 0a64239d61ca27831ddfe67f5ef7685b3dd22641d444e53d0605b4400d03b87a
156 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded external links, many of which point to unknown or potentially malicious domains, indicating a link farm or phishing attempt. ClamAV and ML classifiers also flagged this file as malicious, specifically as a phishing trojan. The presence of embedded URLs suggests an attempt to redirect users to malicious sites, potentially for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://nipisod.ru/123?utm_term=chemfiesta+ideal+gas+law+problems+answers PDF link annotation
    • http://nesebonuvobeju.getenjoyment.net/furodoza.pdfIn PDF document text
    • http://tixesikixux.mygamesonline.org/kamus_bahasa_jawa_kawi.pdfIn PDF document text
    • http://likefetevu.getenjoyment.net/53769133807.pdfIn PDF document text
    • http://zelupelar.iblogger.org/25897005441.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/zukogi/interview_questions_for_receptionist_with_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/perurulexi/anew_ultimate_day_multi_performance_cream.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bfa2b02b-a385-47af-abfa-85eb495ac68d/the_wind_in_the_willows_movie_2019.pdfIn PDF document text
    • https://88211235-bf86-4d40-a6ec-a052db2f682e.filesusr.com/ugd/94e5ef_72d0b39ea40a4e13b6c7f96ff6d38480.pdf?index=trueIn PDF document text
    • http://jusarif.rf.gd/jevulefiguzisajak.pdfIn PDF document text
    • https://s3.amazonaws.com/lewuli/fanamevedimewadaler.pdfIn PDF document text
    • http://zenejifawulo.epizy.com/bahubali_2_full_movie_tamil_1080p.pdfIn PDF document text
    • http://zisepuz.rf.gd/zakipekivivutode.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ec5a9c01-a80b-4ced-a1fa-7a499c441bd2/susulajotan.pdfIn PDF document text
    • https://ca3ec1ac-6ff7-4c8f-ae0f-86a30d86e335.filesusr.com/ugd/3615fb_a83a8384f13840fcb615baded8e33c73.pdf?index=trueIn PDF document text
    • https://926da24b-d3df-4aea-ac1b-ebdf7359a9e7.filesusr.com/ugd/fef925_f4548ff14da7439484dc4f75094c2018.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jeworurowam/6746905041.pdfIn PDF document text
    • https://s3.amazonaws.com/bojafazes/finishes_schedule_excel_template.pdfIn PDF document text
    • https://s3.amazonaws.com/suxuzubojut/vigulen.pdfIn PDF document text
    • https://6f84c080-6bd2-4154-8ce1-0e390380bda5.filesusr.com/ugd/defdb4_bd064b5c068e41cda8ecb592134df6e9.pdf?index=trueIn PDF document text
    • http://xafuvarajuxeg.epizy.com/23091930225.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_off0000ff89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF89 5592 bytes
SHA-256: 4ea12c1e9bfa5319e639d3ad6a74dc2bca3fcbda2ecfcc3e34bbbd3b2391b605
font_01_sfnt_off00011269.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11269 12116 bytes
SHA-256: 964b32d95f1a0086d0e27580ef9ced6f5eda8f38b08bb9eee48c0ffe8fdb4f43

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