Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a97724efbce4934…

MALICIOUS

PDF

76.0 KB Created: 2021-03-03 12:07:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: ebf9c96fecedaff0202b1549801a6d38 SHA-1: fd9fd871c32a7ba070b64979ad5ff20e7dbd5462 SHA-256: 6a97724efbce493479b63dcfb048489a72c40f0deb6e93f2656abf5c2269a5a6
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to disposable domains and link farms, a common tactic for phishing or distributing further malware. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to malicious sites, likely for credential harvesting or malware 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://pelibifir.ru/award?keyword=what+are+the+types+of+conclusions PDF link annotation
    • https://cdn.sqhk.co/lubometusoz/o5ihZEt/modern_warfare_elite_sniper_challenge_8.pdfIn PDF document text
    • http://barajofa.mywebcommunity.org/how_to_integrate_software.pdfIn PDF document text
    • http://fuwegebofu.iblogger.org/48414216402.pdfIn PDF document text
    • http://inertbhjbj.ru/dauntless_beginner_guide_20180p5re.pdfIn PDF document text
    • http://topepuxabi.iblogger.org/bts_billboard_performance_fake_love.pdfIn PDF document text
    • http://povulofi.mywebcommunity.org/tikiwateduwedofobogoluj.pdfIn PDF document text
    • https://cdn.sqhk.co/givogaduta/hhicgeQ/free_rnb_mp3_ringtones_malayalam.pdfIn PDF document text
    • https://cdn.sqhk.co/salefudodid/agfhPgi/cake_decorating_kits_walmart_canada.pdfIn PDF document text
    • http://kutatit.getenjoyment.net/technical_analysis_books_in_bengali.pdfIn PDF document text
    • https://cdn.sqhk.co/pixazizaze/7ijguZR/xodiruwesesepamexoxawiled.pdfIn PDF document text
    • http://dazolovegom.mygamesonline.org/what_is_characterization_in_private_international_law.pdfIn PDF document text
    • https://cdn.sqhk.co/wexifidobafo/ghjh6rb/xisotogosem.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/zarevizebi/62735845114.pdfIn PDF document text
    • https://s3.amazonaws.com/gizonukorad/negikudetiwon.pdfIn PDF document text
    • http://rotitow.rf.gd/wimimadobuga.pdfIn PDF document text
    • https://s3.amazonaws.com/tafogusegabomu/81693702904.pdfIn PDF document text
    • https://s3.amazonaws.com/voropa/ielts_writing_task_1_sample_essays.pdfIn PDF document text
    • http://mesovinofezesat.epizy.com/garmin_etrex_12_channel_gps_price.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_off0000ee9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE9C 5216 bytes
SHA-256: 64adeed2578a9362b62ee3eeaa0edf9bc110ca638b298ec8435c205ca566294f
font_01_sfnt_off0001006d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1006D 9964 bytes
SHA-256: 74ff9337e7b4c4d16738f6d6aebbf81cfabfdcb6143e40c20c632a53dbc2beb3

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