Malicious PDF — malware analysis report

Static analysis result for SHA-256 77830806a23ecde2…

MALICIOUS

PDF

64.8 KB Created: 2021-02-27 02:19:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: e3ca7534da71ab380081730a4f489065 SHA-1: 01948947b4809c13ad1ffc2ec0ad7f2ccfa6e02b SHA-256: 77830806a23ecde29868ba9faacd11467fa8215ddc396fe1747a80caa28fa3de
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URL, https://jacksth.ru/wix?keyword=i%2527m+a+flirt+bpm, which is likely used to redirect users to a phishing or malware distribution site. The document body, though heavily obfuscated, suggests a lure related to a game download, aligning with common phishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://jacksth.ru/wix?keyword=i%2527m+a+flirt+bpm PDF link annotation
    • http://misstourist.info/simonton_daylight_max_reviewsobkfz.pdfIn PDF document text
    • http://mivofalo.22web.org/18198494929.pdfIn PDF document text
    • https://cdn.sqhk.co/fidumugovoz/YmRAQJX/chess_free_game_download_apk.pdfIn PDF document text
    • http://rivobuda.iblogger.org/ada_nabokov_summary.pdfIn PDF document text
    • http://prizinsta.online/mapa_mundi_fisico_para_imprimirqpktd.pdfIn PDF document text
    • http://bisolivagamego.22web.org/confidence_fitness_treadmill_replacement_parts.pdfIn PDF document text
    • https://cdn.sqhk.co/jeforije/fsY9pp0/54504940131.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/bokelur/52715248361.pdfIn PDF document text
    • https://s3.amazonaws.com/mubemutolewe/wopoxidul.pdfIn PDF document text
    • https://s3.amazonaws.com/sajatofubote/timeb.pdfIn PDF document text
    • https://s3.amazonaws.com/jafujasiwetid/ligukopazeseputazo.pdfIn PDF document text
    • https://s3.amazonaws.com/janodojivi/92402302601.pdfIn PDF document text
    • https://s3.amazonaws.com/tevomenil/simpson_s_diversity_index_worksheet.pdfIn PDF document text
    • http://silinodev.rf.gd/14145317199.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_off0000c307.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC307 4980 bytes
SHA-256: f9f9987b26e059d2b1be67f2d939d23f254ef5d52745e142d5b6ef1ae16e2de8
font_01_sfnt_off0000d3e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3E4 10160 bytes
SHA-256: 0b8b0b95887f1d72e7b50aa0ce71b6465645599fc4b46839241552ab50145bb7

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