Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e3da6354eea9884…

MALICIOUS

PDF

65.4 KB Created: 2021-02-20 07:29:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 354979ea8aa7939ee6fac42fac5953f4 SHA-1: 66d5deb348d5ce524a683b3f9de4a12132d9173d SHA-256: 6e3da6354eea988428801bf6504436355755745694f02dd3f74ee72ceeb69db1
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable hosting and link farms, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of techniques used to redirect users to malicious sites, likely for credential harvesting or further payload delivery.

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://bologen.ru/strik?utm_term=how+do+i+update+my+golf+buddy+voice PDF link annotation
    • https://mutokanapagoz.weebly.com/uploads/1/3/1/6/131606569/6cec0.pdfIn PDF document text
    • https://betetitowuti.weebly.com/uploads/1/3/4/3/134331261/fifuzeg_gaxipunimurorit.pdfIn PDF document text
    • https://cdn.sqhk.co/wujakegu/jgihhzQ/43278499525.pdfIn PDF document text
    • https://cdn.sqhk.co/jugemito/jifhe1V/6292512358.pdfIn PDF document text
    • https://cdn.sqhk.co/mofosalamo/hbgcjjd/3291653622.pdfIn PDF document text
    • http://dozixolabizije.iblogger.org/resagetumuwewe.pdfIn PDF document text
    • https://gazufasuro.weebly.com/uploads/1/3/4/4/134482956/6827999.pdfIn PDF document text
    • http://wedavinonuvovu.22web.org/white_christmas_trumpet_sheet_music.pdfIn PDF document text
    • http://fusobilel.iblogger.org/bonita_bpmn_2._0.pdfIn PDF document text
    • http://litamomun.22web.org/gartner_report_2018.pdfIn PDF document text
    • https://cdn.sqhk.co/xewafazuk/0kih2MD/zogiwifegupubuda.pdfIn PDF document text
    • https://cdn.sqhk.co/gegefemorosu/hb5M5jg/t-_rex_runner_unblocked.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/jozaponi/daily_planner_template_word_2019.pdfIn PDF document text
    • http://bopamebedozupux.epizy.com/sison.pdfIn PDF document text
    • http://nilipinuz.rf.gd/bhushi_dam_information_in_english.pdfIn PDF document text
    • http://gukupexokopiwug.epizy.com/zusaw.pdfIn PDF document text
    • https://s3.amazonaws.com/vofadoloves/pisevuvabimediv.pdfIn PDF document text
    • https://s3.amazonaws.com/xefezesebusu/yasin_sura.pdfIn PDF document text
    • http://nutimuratibuzur.epizy.com/metojaniwelomasu.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_off0000c3f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC3F8 5556 bytes
SHA-256: 233ba890b2acb13a817ddf00c24a8f660004a200a8907321a30e50f73aaa7d14
font_01_sfnt_off0000d6f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6F3 9824 bytes
SHA-256: 2766ccff81efc535523b36c1fb8691d77fe725c09af14eb03211a4b29e75bf34

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