Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb473a3aa59cb1cc…

MALICIOUS

PDF

89.6 KB Created: 2021-03-21 04:17:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 558438dea55a0940c5f05b810e1a5e0b SHA-1: a395ee43d13a1bc83fa92cff8f83c98e99559fd0 SHA-256: cb473a3aa59cb1cc43c90bc3b9727c4bcfb03a17e096dfefdb9a125365a66668
126 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous embedded URLs, many of which point to disposable hosting or link farms, suggesting an attempt to redirect users to malicious content. The heuristic PDF_SEO_DISPOSABLE_LINK_FARM specifically flags the document as a link farm on disposable hosting, reinforcing the phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://kuzutuzo.ru/strik?utm_term=technical+drawing+software+ipad PDF link annotation
    • http://lenulari.mypressonline.com/hematology_oncology_textbook.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388177/normal_6013bd15b65e5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489045/normal_60143684a41fe.pdfIn PDF document text
    • https://cdn.sqhk.co/zatuwifezub/ghhigfV/samsung_s10_hole_punch_wallpaper_download.pdfIn PDF document text
    • https://cdn.sqhk.co/tazifawixax/bEu6f21/toritunirokudakuf.pdfIn PDF document text
    • https://cdn.sqhk.co/rumoligodo/dgen9hb/absorption_costing_income_statement_excel.pdfIn PDF document text
    • https://cdn.sqhk.co/xaranoraf/icEgghh/car_crash_hunts_cross_liverpool.pdfIn PDF document text
    • http://bosegabowatitup.iblogger.org/asphalt_8_game_for_android_mobile.pdfIn PDF document text
    • http://fuwifizuj.22web.org/53331679333.pdfIn PDF document text
    • http://lemakomude.sportsontheweb.net/can_you_use_protein_bars_as_meal_replacement.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4391000/normal_5fe4cef666c64.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/kovibu/94395932985.pdfIn PDF document text
    • https://43081b45-6e48-4b43-b724-9328fda377ae.filesusr.com/ugd/26481d_c41064c624cd47618d2aa032bf63d841.pdf?index=trueIn PDF document text
    • http://lukoleni.epizy.com/power_pro_braid_30lb_review.pdfIn PDF document text
    • http://wulakutagugizi.rf.gd/adobe_premiere_pro_2_tutorials.pdfIn PDF document text
    • http://bozagasixafovo.atwebpages.com/makitikokalinitafufubu.pdfIn PDF document text
    • https://s3.amazonaws.com/sefabe/work_permit_form_for_minors_in_louisiana.pdfIn PDF document text
    • https://s3.amazonaws.com/lixasifasi/pepovokesagamavivumozi.pdfIn PDF document text
    • http://likijanima.epizy.com/mumalemurekigoniw.pdfIn PDF document text
    • http://tebaputazaxuva.myartsonline.com/xanitewofupijadesurer.pdfIn PDF document text
    • https://s3.amazonaws.com/vipuxafol/41995188848.pdfIn PDF document text
    • https://f55c6975-0091-4942-a106-dc80285e5f9d.filesusr.com/ugd/8a4248_6d6d40d869074d27a11b08aac2ee73c1.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xajowu/pazododitewixolaseto.pdfIn PDF document text
    • https://7e005a1c-fb68-43c1-af83-b854b6a2d282.filesusr.com/ugd/dcfb95_55dc5a1454394ca9a8e95db34b982ed6.pdf?index=trueIn 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_off00011ec2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EC2 5456 bytes
SHA-256: 92fcae0c5ccd4497bc1b3eb81435b366cda9b108a6d5ec786279fade1d804d26
font_01_sfnt_off00013163.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13163 11768 bytes
SHA-256: 005f2cca406b9e11429904c68cb13e9559997760e61de2d251034008d3d198a1

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