Malicious PDF — malware analysis report

Static analysis result for SHA-256 c88eda935e2c959f…

MALICIOUS

PDF

77.6 KB Created: 2021-03-25 15:10:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 544091d50644933dab7d9ea8f9e0e4b7 SHA-1: 12610e2886dd2f52c81d07e975a212b93d10d153 SHA-256: c88eda935e2c959fb4063bba747e05f8cc971cef757ef0d7cd23c5596746dc58
134 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous external links, many hosted on disposable domains, suggesting an attempt to redirect users to malicious sites. The presence of a 'download button' heuristic further supports a lure-based attack pattern. While no scripts were explicitly extracted, the PDF structure and numerous URLs indicate a likely attempt to download a second-stage payload or phish for credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://botokaw.ru/wix?keyword=tap+sports+baseball+2018+hack+no+human+verification
    • http://warewakeb.sportsontheweb.net/tom_clancys_the_division_2_gameplay_single_player.pdf
    • https://static.s123-cdn-static.com/uploads/4406208/normal_5fcd3df96c0a9.pdf
    • http://wofeboz.66ghz.com/weather_report_tomorrow_in_mysore.pdf
    • http://kivikevakefum.22web.org/15080201461.pdf
    • http://kixinikuzilot.22web.org/64997742015.pdf
    • http://vazawujuzu.sportsontheweb.net/sarah_plain_and_tall_winters_end_movie.pdf
    • http://walolexokesufa.sportsontheweb.net/innova_3020_review.pdf
    • https://cdn.sqhk.co/tapowifilez/djadkii/run_2020_telugu_cast.pdf
    • http://didibemez.scienceontheweb.net/livro_tica_na_administrao_pblica.pdf
    • https://cdn.sqhk.co/nixivezez/hHqOMAM/cajun_ninja_vegetable_soup_recipe.pdf
    • http://jupowawixiz.iblogger.org/hemispheric_specialization_answer_key.pdf
    • https://cdn-cms.f-static.net/uploads/4404113/normal_60296ea345aae.pdf
    • https://cdn.sqhk.co/muluxodipoto/gfSkjft/adidas_youth_swingman_jersey_size_chart.pdf
    • https://static.s123-cdn-static.com/uploads/4375095/normal_5ffeed6e6cd1b.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/a51da4c9-a94f-41d6-a09e-f546c174b852/julian_date_calendar_leap_year_2020.pdf
    • https://uploads.strikinglycdn.com/files/635c3e2d-be65-4afe-a5ae-0c93f10ffe2b/13145252830.pdf
    • https://uploads.strikinglycdn.com/files/3cc2076f-4d19-42d6-a92f-3b6fb2c64902/price_of_accu_chek_strips_in_pakistan.pdf
    • http://sarebabeb.epizy.com/fowurirup.pdf
    • http://gumenunusukuk.rf.gd/mp3_to_midi_file_converter_software_free_download.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eb69.bin
fb63bfae8a1416147852b233f0618b955fb4a91ae19a95cb01805f08d8c21655		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEB69 5988 bytes
font_01_sfnt_off0000ffa6.bin
41ca99e36959ff4a651a3d6f3e3c53aa0b4d6c74428dbc43723a5ad68fdaf2dd		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFFA6 11484 bytes

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