Malicious PDF — malware analysis report

Static analysis result for SHA-256 cff56d9ca6eafea3…

MALICIOUS

PDF

77.9 KB Created: 2021-03-12 08:28:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 243577af43b69e1d0d5d26c5ad969595 SHA-1: 95fa5cef8b360aa6fdacda2c27168dbb4eff8a56 SHA-256: cff56d9ca6eafea319cf952deeb5da473fce9ff171d8c65fdf5c046631e20e93
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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://maypoin.ru/wix?keyword=architecture+of+happiness+pdf PDF link annotation
    • https://rodedewosesuge.weebly.com/uploads/1/3/6/0/136010241/fenosuvi.pdfIn PDF document text
    • http://sebevifa.getenjoyment.net/alice_in_wonderland_full_text.pdfIn PDF document text
    • http://helps-lnstagramcopyrights-about.com/662207521870acz9.pdfIn PDF document text
    • https://cdn.sqhk.co/gupimupiset/8Xdjbia/kotoperodifetijofivofisow.pdfIn PDF document text
    • http://libralab.digital/paint_3d_cannot_open_file00b1i.pdfIn PDF document text
    • http://lnstagramverifiedbadge-media.com/13593835093tw83u.pdfIn PDF document text
    • https://lanoxujuzon.weebly.com/uploads/1/3/4/6/134630121/82665652.pdfIn PDF document text
    • https://cdn.sqhk.co/teposodigar/agjV9tD/s_g_o_t_and_sgpt.pdfIn PDF document text
    • http://samafutanub.mypressonline.com/97348830235.pdfIn PDF document text
    • http://indital.fun/petsafe_shock_collar_not_workingkhuh3.pdfIn PDF document text
    • https://xusisuzonetov.weebly.com/uploads/1/3/1/4/131456320/xezemuwivunakuzikis.pdfIn PDF document text
    • http://freefire-gifts.com/70766459617zv392.pdfIn PDF document text
    • http://mavigawika.scienceontheweb.net/47007089622.pdfIn PDF document text
    • http://lulopoboxefon.scienceontheweb.net/jenepot.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://pesetunal.onlinewebshop.net/how_to_get_started_with_my_kindle_paperwhite.pdfIn PDF document text
    • http://nununad.myartsonline.com/braking_distance_formula.pdfIn PDF document text
    • https://s3.amazonaws.com/besafefaf/38522277713.pdfIn PDF document text
    • https://s3.amazonaws.com/gotijejaj/all_might_skinny_form_height.pdfIn PDF document text
    • https://s3.amazonaws.com/waxapoz/granite_mountain_hotshots_final_report.pdfIn PDF document text
    • https://s3.amazonaws.com/lekelepowo/clases_de_sistemas_operativos_para_moviles.pdfIn PDF document text
    • http://pakapenabu.atwebpages.com/88745225565.pdfIn PDF document text
    • http://jadivepijuga.myartsonline.com/3538397941.pdfIn PDF document text
    • https://s3.amazonaws.com/dosipive/reduce_size_mac_adobe.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e6ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6FF 5080 bytes
SHA-256: 781cdc8bdb37b485f91dacbc833cee6a95a645c4d788518c390d2080ae01cd16
font_01_sfnt_off0000f832.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF832 10460 bytes
SHA-256: 67e68dd11d6dc53af55ff611e15f8680778438a18f9ea37c4b87dc60b8442c6f
font_02_sfnt_off00011c01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C01 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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