Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5f2a24f2e3883cf…

MALICIOUS

PDF

85.7 KB Created: 2021-05-17 01:08:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 0d3291bf981690db805e8183c27f68d7 SHA-1: 10c95056c2e096c54f9f42448ef26d0a92aa0a60 SHA-256: f5f2a24f2e3883cf966d2778300cccdea741f46ab6537164d0356350c5a52a4a
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous embedded URLs pointing to various domains, with at least one identified as a potential phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of external URIs and link farm heuristics suggests the document is designed to redirect users to potentially harmful sites, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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://baarspo.ru/strik?utm_term=blankets+craig+thompson+ebook PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4385198/normal_603c3e32149f0.pdfIn PDF document text
    • https://cdn.sqhk.co/kukelagalefe/iijjyjc/ketad.pdfIn PDF document text
    • http://demunanenika.iblogger.org/28409190455.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465151/normal_600c7e1b45c7f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4372740/normal_5ffd6e530d796.pdfIn PDF document text
    • https://cdn.sqhk.co/sapugelezuf/bOiacjb/star_wars_galaxy_edge_movie_release_date.pdfIn PDF document text
    • https://cdn.sqhk.co/wuvinudubuno/xzhbpif/jogo_moto_wheelie_2_dinheiro_infinito.pdfIn PDF document text
    • https://cdn.sqhk.co/gupetipek/rV5G3je/75955828860.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472753/normal_6066ec20b00c1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383308/normal_5fe9ff17aef22.pdfIn PDF document text
    • http://nezowigivomi.scienceontheweb.net/aradhike_song_lyrics_download.pdfIn PDF document text
    • https://cdn.sqhk.co/feketukadoz/gfijjdK/zodoravaguwep.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nasukenapab.epizy.com/organizational_culture_and_leadership_schein_1985.pdfIn PDF document text
    • http://wukevuwotud.rf.gd/arabic_fonts_zip.pdfIn PDF document text
    • http://xisamilar.epizy.com/acid_and_base_definition_and_examples.pdfIn PDF document text
    • https://s3.amazonaws.com/napoledunadigo/what_is_a_limited_service_hotel.pdfIn PDF document text
    • http://dufobirufo.atwebpages.com/fitbit_charge_2_hr_xl_band.pdfIn PDF document text
    • http://gulaguwiz.rf.gd/redesupepiwufezajil.pdfIn PDF document text
    • http://faluzarawajuxos.epizy.com/nimetubibufox.pdfIn PDF document text
    • http://poluxik.epizy.com/28165531702.pdfIn PDF document text
    • https://s3.amazonaws.com/towutoginadivu/kahoot_smasher_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/fofeguj/hazardous_drug_risk_assessment_template.pdfIn PDF document text
    • https://s3.amazonaws.com/zerepuzuze/97640171436.pdfIn PDF document text
    • http://tuminexozuvino.atwebpages.com/20516544725.pdfIn PDF document text
    • https://s3.amazonaws.com/zumomasugipeno/country_dance_songs_2019_2_step.pdfIn PDF document text
    • http://nivepaxu.rf.gd/1000_most_common_adjectives_in_english.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_off000112c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112C3 5600 bytes
SHA-256: ce4f0225b6f38ee825afad2cee52a9d2f1f931030ead457fd99a6bc114601b42
font_01_sfnt_off0001259d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1259D 10436 bytes
SHA-256: ff717bc8ec02d14497885de55807642d37859086c26acddeb5a0c0408ebf8b0e

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