Malicious PDF — malware analysis report

Static analysis result for SHA-256 a9813ff8a50b3035…

MALICIOUS

PDF

70.7 KB Created: 2021-03-10 01:56:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 400cce5e566612e9d730017fff3de43b SHA-1: 6eea1c72250500a9415deb4cbdf54f07e894cab7 SHA-256: a9813ff8a50b3035847544634c0880312b9b78cea5f29f71cc1d6f5a5159dd53
134 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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://zajinet.ru/award?keyword=adjectives+with+prepositions+exercises+with+answers+pdf PDF link annotation
    • http://libuwapuvewipev.mywebcommunity.org/ronorexoliginapubokuwa.pdfIn PDF document text
    • http://tuzupibu.scienceontheweb.net/sound_attenuator_selection.pdfIn PDF document text
    • http://hq-cleartv.info/why_is_my_kindle_not_fully_charging3gesy.pdfIn PDF document text
    • http://libralab.digital/xefikeptj7we.pdfIn PDF document text
    • http://rolapisi.scienceontheweb.net/how_to_insert_bobbin_singer_sewing_machine.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487386/normal_6041ad8b544f0.pdfIn PDF document text
    • http://wubujonil.getenjoyment.net/bob_revolution_stroller_se_used.pdfIn PDF document text
    • http://xiwupulo.medianewsonline.com/vokijimivo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459792/normal_5fe81bcbc9c53.pdfIn PDF document text
    • http://wozilimesiz.mypressonline.com/psycho_cybernetics_chapter_5_summary.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392220/normal_602167f7b0355.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://6f8cb219-4830-455d-9ced-b55e65700e85.filesusr.com/ugd/fd30ac_2e0416131be143a4a896bf9f9beb04e8.pdf?index=trueIn PDF document text
    • https://e25b7b56-d8f7-44cb-9276-56428e53d1cc.filesusr.com/ugd/63f3e8_a29fa9943c07421a92cac690fc820a97.pdf?index=trueIn PDF document text
    • https://247e77cc-5367-4382-8586-7c5891409f42.filesusr.com/ugd/2dbf5a_79a3ad15fa214ce3815dd02853388045.pdf?index=trueIn PDF document text
    • https://aed022ca-8a9d-452d-9022-56a74a585a14.filesusr.com/ugd/4d548e_dd19b722ee0d484e8b7f30ba0744b412.pdf?index=trueIn PDF document text
    • http://vewawisu.onlinewebshop.net/biorad_mini_protean_tgx_stain_free_gels.pdfIn PDF document text
    • http://fuguzametekobo.myartsonline.com/jawbone_mic_not_working.pdfIn PDF document text
    • http://pevogikuxupeja.onlinewebshop.net/gimp_tutorial_beginner_video.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_off0000d6b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6B1 5496 bytes
SHA-256: d5cac9080a551382b69ce04e2b00d3e95db4d7d53faa4118dba0c6b13c29aed9
font_01_sfnt_off0000e97d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE97D 10380 bytes
SHA-256: 32c3362689b58f4e0eeee3583ed547934f268af5ccf3de02bc16d2d16cbc6afc