Malicious PDF — malware analysis report

Static analysis result for SHA-256 ead7015236dc7b6d…

MALICIOUS

PDF

78.6 KB Created: 2021-03-22 06:19:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: f18f113f5b5edd229a294f00896a63ed SHA-1: 340c88a5022875b42cdd3ea6ddf1ec6f1d0e53f2 SHA-256: ead7015236dc7b6d207074acdb3e49aa1c8a1666fd17ddb1f821c90d445f66e4
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 0.9997

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://druttle.ru/award?keyword=program+assessment+rating+tool+pdf PDF link annotation
    • http://bumufirila.mygamesonline.org/binh_php_tn_t_dnh_cho_phi_p.pdfIn PDF document text
    • https://cdn.sqhk.co/terasovo/heXKyew/selexakezegomukok.pdfIn PDF document text
    • http://tufuwavaziga.mygamesonline.org/lepijozosi.pdfIn PDF document text
    • http://jomikifu.medianewsonline.com/komplikasi_atresia_ani.pdfIn PDF document text
    • http://rowexusaje.mypressonline.com/mors_kochanski_survival_scarf.pdfIn PDF document text
    • https://cdn.sqhk.co/letarezetap/CtjdgtM/fast_money_halftime_report_cnbc_fix.pdfIn PDF document text
    • http://zaxiluxedexu.getenjoyment.net/iowa_cubs_schedule_2020.pdfIn PDF document text
    • http://tedurelaseji.mygamesonline.org/gokaduwegojatafanikesevar.pdfIn PDF document text
    • http://gagivukamuw.getenjoyment.net/73703946172.pdfIn PDF document text
    • http://lamejix.scienceontheweb.net/sumaseverajanepamama.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://f270a619-8d23-4dc9-95fa-a4320df4b75e.filesusr.com/ugd/7bd364_6f36240b1e0c41a8b0afc42599c6ff77.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zoluwivebiro/chronic_pancreatitis_ppt.pdfIn PDF document text
    • http://kulebosux.myartsonline.com/mutoli.pdfIn PDF document text
    • https://s3.amazonaws.com/nopomewegobij/94331190994.pdfIn PDF document text
    • https://827a6da4-a69c-4806-aaaa-db522494bc4d.filesusr.com/ugd/cb5916_0e62bb83993644fea0a3dcd2e56a9022.pdf?index=trueIn PDF document text
    • https://85ed388a-52e0-4e79-9737-9d4b769dda71.filesusr.com/ugd/bb10c5_79c69667ef554f138206e57701afb42e.pdf?index=trueIn PDF document text
    • http://fiforeru.atwebpages.com/learn_arabic_for_kids.pdfIn PDF document text
    • https://77da94c0-0f0a-445b-87af-e489a0b5ef66.filesusr.com/ugd/db1da1_c686d17163e44d9092fe9ef815e82c62.pdf?index=trueIn PDF document text
    • http://pavabiza.atwebpages.com/3141405196.pdfIn PDF document text
    • https://s3.amazonaws.com/jiwisi/disuvuduzup.pdfIn PDF document text
    • https://0879403c-3be5-48e4-925f-21334a7d5cfe.filesusr.com/ugd/407fcc_ff32ace78bb742469ecfa61f4aafdce1.pdf?index=trueIn 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_off0000f3ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3CA 5360 bytes
SHA-256: cb84cff7180dd19c1a62f91c8e68cabbf43cd361b8519107cf9dae44926a93e2
font_01_sfnt_off000105ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105EF 12208 bytes
SHA-256: f2fb07a0169ec2f83bc9e6d0dfe0171d2218e140f97ec39515d52eff585fa950

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