Malicious PDF — malware analysis report

Static analysis result for SHA-256 a24fb0e92511f275…

MALICIOUS

PDF

84.6 KB Created: 2021-02-17 16:12:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 8518592d57ded1dacf5923b6b3ba7a3b SHA-1: 7fb0c2fab43449e1105bd31a47f5390bce0bd0e2 SHA-256: a24fb0e92511f2759576d006c75abe212c9b7d9e00cdcfde28d4e52734ccbefe
124 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 disposable domains, a common tactic for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though partially corrupted, includes text related to 'Call me by your name book back cover' and 'wkhtmltopdf', suggesting a lure to disguise malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9532

Heuristics 4

  • 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
  • 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/aws?utm_term=call+me+by+your+name+book+back+cover PDF link annotation
    • http://carbags.site/bcci_logo_imageszxc0c.pdfIn PDF document text
    • http://ritixabig.iblogger.org/bewars_telugu_movie_audio_songs.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462732/normal_602338923104c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459321/normal_5fcfae690b7a2.pdfIn PDF document text
    • http://nelawetazabuta.66ghz.com/alarm_clock_app_for_android_phone.pdfIn PDF document text
    • http://italywow.pro/fopoxg8own.pdfIn PDF document text
    • http://7lessons.fun/lista_de_hechizos_de_harry_potter713do.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378410/normal_5fce9c3a29017.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403404/normal_6015db0e292c1.pdfIn PDF document text
    • http://idealica-italiaoficial.site/edison_scratch_2500_professional_portable_dj_system_manualojr6x.pdfIn PDF document text
    • https://jileninaniwepuz.weebly.com/uploads/1/3/4/7/134771173/nedijizobe.pdfIn PDF document text
    • http://taxurofetizi.22web.org/bluetooth_driver_for_hp_pc.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://taguramol.rf.gd/xokosogufowexumesip.pdfIn PDF document text
    • http://nabesazuxipuf.epizy.com/washington_post_crossword_answers.pdfIn PDF document text
    • http://lebofimuvi.rf.gd/marksheet_of_class_10_cbse_2017.pdfIn PDF document text
    • http://repajazofuwide.epizy.com/zones.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001331b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1331B 5040 bytes
SHA-256: b8cd9cf679dbe39cad26b20cd726fedc007317c4b2a58f0965c1214f7401d1a3

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