Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e7d3158b87ad558…

MALICIOUS

PDF

94.4 KB Created: 2021-03-27 23:28:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 514d1437cc0a9187635c6f6752b57b57 SHA-1: 5ec74bfa5bc151b5bf2154bb18c0a199f53d8e76 SHA-256: 5e7d3158b87ad558268e43969d9fd4fa24fd8a521091288a6fbb7f4450d3abeb
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, identified as a link farm, designed to redirect users to potentially malicious websites. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. The presence of embedded URLs and the 'PDF_SEO_LINK_FARM' heuristic confirm the attack pattern of directing users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

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 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/award?keyword=bipolar+disorder+scale+pdf PDF link annotation
    • http://minesaxofunawi.getenjoyment.net/ap_microeconomics_workbook_answers.pdfIn PDF document text
    • http://gukevipagopu.mywebcommunity.org/naworetisetuwofeka.pdfIn PDF document text
    • http://storergoods.site/jowuxekelomusokal8h07g.pdfIn PDF document text
    • http://gajonedorebuko.mywebcommunity.org/13179758743.pdfIn PDF document text
    • https://lojimosaxamigek.weebly.com/uploads/1/3/5/9/135976806/fenosilesugedad.pdfIn PDF document text
    • http://fakurivevid.scienceontheweb.net/how_to_cook_rainbow_trout_in_a_pan.pdfIn PDF document text
    • https://zinegekoxemajaj.weebly.com/uploads/1/3/4/7/134767253/bapebiwewe-nubaritakon-votapewinomej.pdfIn PDF document text
    • http://top-agent.ru/jevitebobifamalizuguruva70xvc.pdfIn PDF document text
    • http://lnstagram-copyright-confirms.com/82881705791wq8w.pdfIn PDF document text
    • https://zodukoweferu.weebly.com/uploads/1/3/1/0/131069906/3023632.pdfIn PDF document text
    • https://nutikatike.weebly.com/uploads/1/3/4/6/134601603/lujela.pdfIn PDF document text
    • https://mujiborabasovu.weebly.com/uploads/1/3/4/5/134590634/7901a170e.pdfIn PDF document text
    • http://reduslim-siteofficial.site/87367840923yfwst.pdfIn PDF document text
    • http://kind-insta.site/143680854601kk5g.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zikoliduxa.atwebpages.com/rubufejoxomevegutila.pdfIn PDF document text
    • https://s3.amazonaws.com/midizaxopazeji/car_driving_game_free_for_android.pdfIn PDF document text
    • https://s3.amazonaws.com/vaxebisapesi/chaser_movie_in_tamil.pdfIn PDF document text
    • https://s3.amazonaws.com/semuxemakaw/allstar_performance_aluminum_radiator.pdfIn PDF document text
    • https://s3.amazonaws.com/kikunojulejuj/blaupunkt_tv_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/musokejixami/gekagisegiwazulipuz.pdfIn PDF document text
    • https://s3.amazonaws.com/jusuberu/tigoxeguzizinurudogi.pdfIn PDF document text
    • https://s3.amazonaws.com/zuwosil/sheet_music_blank_guitar.pdfIn PDF document text
    • https://s3.amazonaws.com/xezujuxoz/best_site_for_cracked_apk_games.pdfIn PDF document text
    • https://s3.amazonaws.com/daraniwekamidir/graphing_systems_of_inequalities_word_problems_worksheet.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011f87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F87 5200 bytes
SHA-256: 4c3b605f8e7aa67899a982a282e859265ebaa732536dfa4a86656bde012cea7b
font_01_sfnt_off00013146.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13146 11032 bytes
SHA-256: 7a21e32d31b79080dfdabaccde93ae4fbae77a7339ee5524e7eaf7d075bae37f
font_02_sfnt_off00015703.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15703 16060 bytes
SHA-256: 2173a1880e9f774f759393e7d0d28dda91d04d8a3eae6bea41b822770b343b90

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