Malicious PDF — malware analysis report

Static analysis result for SHA-256 81999a6e39eddd27…

MALICIOUS

PDF

83.1 KB Created: 2021-03-17 05:31:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 38960b98e617b3d7ad7d9e09503ec0c1 SHA-1: 96dc1481527f90358e8f010782b6bd517bd43449 SHA-256: 81999a6e39eddd27e971c9d54e66a81829767b5e364c9b47399cf1f1485951ba
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://resalured.ru/123?utm_term=transformers+botbots+tv+show PDF link annotation
    • http://lekanevakima.iblogger.org/fupin.pdfIn PDF document text
    • http://ruluzuzadol.mypressonline.com/best_motorcycle_tire_shop_near_me.pdfIn PDF document text
    • https://cdn.sqhk.co/sadebupunen/icLvogr/500_words_2020_prize.pdfIn PDF document text
    • http://pedrons.space/kriya_for_elevationb7my7.pdfIn PDF document text
    • http://esmoney.site/the_hidden_shrine_of_tamoachantpjwf.pdfIn PDF document text
    • https://cdn.sqhk.co/petawelesup/hjIRijA/sword_of_chaos_for_pc.pdfIn PDF document text
    • https://cdn.sqhk.co/neseleko/djaUgcj/corporate_pilot_jobs_arizona.pdfIn PDF document text
    • https://cdn.sqhk.co/bomikiwolug/hhhi5hb/33642566928.pdfIn PDF document text
    • https://cdn.sqhk.co/burajugi/cejjihK/word_on_fire_podcast_archives.pdfIn PDF document text
    • https://cdn.sqhk.co/tevitogaperu/he9ichj/38565346204.pdfIn PDF document text
    • https://cdn.sqhk.co/difixoruze/9cV3jpw/find_my_friends_app_icon_not_showing.pdfIn PDF document text
    • https://cdn.sqhk.co/wikaraxixi/jiQh0jj/6103939235.pdfIn PDF document text
    • http://nositadox.mypressonline.com/12457502424.pdfIn PDF document text
    • https://cdn.sqhk.co/kekumumaxow/ghjcyST/damulutekidebotijifivok.pdfIn PDF document text
    • https://cdn.sqhk.co/wolanojijen/dZggheE/71837750948.pdfIn PDF document text
    • https://cdn.sqhk.co/ruzaxube/gdjaifK/21164267496.pdfIn PDF document text
    • http://madamzero.com/rounding_numbers_worksheets_grade_64flos.pdfIn PDF document text
    • https://cdn.sqhk.co/fujalapevame/ehhdF1M/download_apk_buildings_for_minecraft_pe_pro.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jakurudapamole.rf.gd/queen_size_bed_sheet_set_cheap.pdfIn PDF document text
    • http://kusofiwu.epizy.com/savodegadufex.pdfIn PDF document text
    • http://sijisizaf.rf.gd/gazuxaw.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010820.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10820 5216 bytes
SHA-256: 7efe3df3c8d3dcb642759c8a6e1f2b75c3fa22761e5c2ace4f6e7ebf805a2199
font_01_sfnt_off000119c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119C3 11392 bytes
SHA-256: cb99c5eef983a6d4dbb97e6f466cb757bf6772ab9eab2d056c3b36ac1f0e8239

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