Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ea82757a96fe73c…

MALICIOUS

PDF

87.0 KB Created: 2021-05-16 03:06:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 03e0729a050b64cc1dcdcbfbfc1a9d6b SHA-1: 3c8916d0885778e9434561a35005b387c0a55bb3 SHA-256: 0ea82757a96fe73cc305a12b6b392d24f8298252ca8734de8382f66dffde4f27
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. It contains numerous external links, including one that mimics a search query for a technical issue, suggesting a phishing or credential harvesting attempt. The presence of embedded URLs and the link farm heuristic further support this, pointing towards a distribution mechanism for malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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/wb?keyword=sandisk%20clip%20sport%20plus%20not%20connecting%20to%20bluetooth PDF link annotation
    • http://allerop.xyz/83162834410dahaj.pdfIn PDF document text
    • http://healthyforczechrepublic.site/mibezupatupe3mv9u.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369908/normal_5fcad706d4df5.pdfIn PDF document text
    • http://cardioactiveitalia.site/fukogegobarefenuvisoghof.pdfIn PDF document text
    • https://cdn.sqhk.co/kenujowemi/ijSifih/pafozufiwuzodasopiw.pdfIn PDF document text
    • http://sbrf.link/pawifoxawebegik5xe1q.pdfIn PDF document text
    • http://livethailand.fun/katetoronixefebog69mw.pdfIn PDF document text
    • http://qwertyujg.xyz/how_to_calculate_a_target_profitrlasi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477376/normal_60514c12969e3.pdfIn PDF document text
    • http://henrysavbr.site/vudivanikexubox26odo.pdfIn PDF document text
    • https://cdn.sqhk.co/redixebu/ahe0Lgh/weather_forecast_for_today_in_philadelphia.pdfIn PDF document text
    • http://wgathering.org/49260592558a5x7c.pdfIn PDF document text
    • https://cdn.sqhk.co/laruxibut/hmaKw83/29414061806.pdfIn PDF document text
    • http://lollipopa.online/wow_disc_priest_gear_guidekkpkv.pdfIn PDF document text
    • http://topstop.site/libros_de_castoriadisielpv.pdfIn PDF document text
    • http://lokotahas.ru/tecumseh_vertical_engines_for_saleojlnh.pdfIn PDF document text
    • https://cdn.sqhk.co/sebutarukaw/d5jd9ia/flight_sim_2018_mod_apk_1._2._9.pdfIn PDF document text
    • http://choosenews.space/ants_marching_ukulele_chordsl9dhx.pdfIn PDF document text
    • http://carinsusa.info/spectrum_math_workbook_grade_8_free92cvz.pdfIn PDF document text
    • https://cdn.sqhk.co/waxolulum/415jfhh/freebies_giveaways_samples.pdfIn PDF document text
    • http://dvigatel.guru/realismo_juridico_genovesfekoh.pdfIn PDF document text
    • http://trokot-online.xyz/circuit_breaker_directory_template_freexv5fd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476757/normal_602efb48b90f4.pdfIn PDF document text
    • http://thechambre.xyz/what_chemicals_are_in_ocean_waterse3g0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0001145b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1145B 5640 bytes
SHA-256: 44c3d3c5cc61188290f4851f9261865dce41e7b4ab66b2ff42d3032cee1a5098
font_01_sfnt_off00012782.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12782 11176 bytes
SHA-256: e398aa8dd75366882a4188cba5dfd5f450cbfe6b1ac98cfe4178a5d1c5ae8081

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