Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8ed32914483aa5a…

MALICIOUS

PDF

67.8 KB Created: 2021-02-15 20:12:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 6791ce32500d167cc2fc3109285bdab5 SHA-1: 70ff0dab76b803cd4351b253f3c23afa22a6aa91 SHA-256: d8ed32914483aa5a8ad7654997d67c771c65d07c3802f0d0e3d59d782970a5c1
126 Risk Score

Malware Insights

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

The sample is a PDF file flagged by ClamAV as 'Pdf.Phishing.Trojan' and by an ML classifier as malicious. It contains multiple embedded URLs, with at least one, 'https://jacksth.ru/strik?utm_term=quran+in+hindi+with+arabic+pronunciation+pdf', appearing to be part of a link farm designed to redirect users. The PDF's structure and embedded links suggest it is used as a lure to direct users to potentially malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://jacksth.ru/strik?utm_term=quran+in+hindi+with+arabic+pronunciation+pdf PDF link annotation
    • https://cdn.sqhk.co/dogutadova/jjDDZjg/ping_pong_the_animation_characters.pdfIn PDF document text
    • https://cdn.sqhk.co/rekewuneboxu/LRW1mgd/89581995229.pdfIn PDF document text
    • https://cdn.sqhk.co/bepemuno/gejeidO/72269925972.pdfIn PDF document text
    • https://cdn.sqhk.co/kosifodalab/ha0w0Bc/lojinixiwos.pdfIn PDF document text
    • http://temevifeg.iblogger.org/mesusuweku.pdfIn PDF document text
    • https://cdn.sqhk.co/xumesapaxoku/fjcGhiK/gujenujewaputamuxuvutule.pdfIn PDF document text
    • https://cdn.sqhk.co/vopufepivipe/dijFiaK/70625972646.pdfIn PDF document text
    • https://cdn.sqhk.co/devisofage/jMgggfC/63893763559.pdfIn PDF document text
    • http://byseles.xyz/349080928138rwj.pdfIn PDF document text
    • https://cdn.sqhk.co/vekuzajomugi/ibrapWH/final_fantasy_7_remake_walkthrough_chapter_17.pdfIn PDF document text
    • http://dadefuxafovub.22web.org/home_appraisal_template_excel.pdfIn PDF document text
    • http://secureappeal.com/new_landline_number_format_philippinesz5kuc.pdfIn PDF document text
    • http://bit7.top/xijimatuxibasuzafozupozed0nnw.pdfIn PDF document text
    • http://vvinorama.fun/im_supposed_to_or_im_suppose_toeyr9q.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://redusaboj.epizy.com/kundi_much_song_video.pdfIn PDF document text
    • http://novoboninixeme.epizy.com/create_filter_in_ssrs_report.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_off0000c9e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9E8 5324 bytes
SHA-256: 2c970269a5099791876ff6a5aca73f1145af564b60a4fc357a7faff8fa73cac8
font_01_sfnt_off0000dc0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC0C 10552 bytes
SHA-256: a958b3ca75b61cd0128c733d7169b6bcc68bf829d0f40f450617589836ef3f9f

Open this report in the interactive analyzer, or submit your own file for analysis.