Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce5f664b202c4428…

MALICIOUS

PDF

78.0 KB Created: 2021-04-29 04:04:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 7bfa1002e1e1b92955ba0cb57006db0d SHA-1: 446333ef8dd1997dfd1e402d47b02c1e6559fb64 SHA-256: ce5f664b202c4428af1c204661e4bd7c2dabf6f9319f0f53f46782a9aa061aec
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a machine learning classifier and ClamAV, as malicious and phishing-related. It contains numerous embedded URLs, many pointing to disposable domains, suggesting a link farm or phishing campaign. The document body, though heavily obfuscated, contains text related to DNA structure, likely a lure to disguise the malicious intent of redirecting users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://leonvi.ru/strik?utm_term=what+is+molecular+structure+of+dna PDF link annotation
    • http://degifutuv.scienceontheweb.net/94366132256.pdfIn PDF document text
    • http://igbusinessabouthelp.com/html_code_for_highlighting_text3wt1g.pdfIn PDF document text
    • https://cdn.sqhk.co/lexoxuxoluvi/9hc3nYp/hollywood_paradise_restaurant.pdfIn PDF document text
    • http://zanovekolasin.mywebcommunity.org/vamenuseve.pdfIn PDF document text
    • http://lozuzaragujeb.mypressonline.com/l_athisme_expliqu_aux_croyants.pdfIn PDF document text
    • http://fakexexu.sportsontheweb.net/departamento_de_alimentos_y_bebidas_en_un_hotel.pdfIn PDF document text
    • http://jawixogu.mygamesonline.org/nomuxugetidabu.pdfIn PDF document text
    • https://cdn.sqhk.co/joremeve/nVUhdje/trenches_lyrics_lil_durk.pdfIn PDF document text
    • https://cdn.sqhk.co/xemuxebu/jrwLFV1/pokasalewijijakobobina.pdfIn PDF document text
    • http://zopokujejisolan.getenjoyment.net/zodoxubixetojef.pdfIn PDF document text
    • https://cdn.sqhk.co/dagufiwus/eihdweU/51862156317.pdfIn PDF document text
    • http://gudokav.sportsontheweb.net/the_laburnum_top_extra_questions_and_answers.pdfIn PDF document text
    • http://repair-planshetov.ru/love_and_sex_second_base5dw28.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/22f6c40a-2292-4fce-874d-2ecf48706c12/sitewofosawez.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9750073c-25f8-46cb-9b2d-74c911a4b0fd/labakeges.pdfIn PDF document text
    • https://s3.amazonaws.com/poresi/descargar_biblia_de_estudio_holman.pdfIn PDF document text
    • https://s3.amazonaws.com/tojabixefova/pokarodekopepuzek.pdfIn PDF document text
    • https://s3.amazonaws.com/sasufufa/synonyms_for_guided_imagery.pdfIn PDF document text
    • http://tulajadulixo.myartsonline.com/just_2_words_puzzle_1019_answer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f8d6f129-f0ab-46b7-9522-ef6dda3da847/43759032234.pdfIn PDF document text
    • https://s3.amazonaws.com/jadudusujuje/9035092384.pdfIn PDF document text
    • https://s3.amazonaws.com/fovezewi/19272918369.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3691a4d3-5983-4c44-b71c-b08226fffb2c/23104802628.pdfIn PDF document text
    • http://jupegojut.atwebpages.com/speed_queen_dryers_commercial.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_off0000f320.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF320 5272 bytes
SHA-256: c6e3b5101400d875717dd131eac816cc6a2eeecc59f8b570f4eabddcb6c2b23e
font_01_sfnt_off000104f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104F1 10528 bytes
SHA-256: 66470a5563d8b26fa52a972d2cb54e13421c8e9c427ba8ddd8957453b2bb25ae

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