Malicious PDF — malware analysis report

Static analysis result for SHA-256 182c86c2cf899113…

MALICIOUS

PDF

88.4 KB Created: 2021-04-30 16:46:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 8d16a6b36f126b73eb9470f9aa9a3360 SHA-1: 2206c4b47172d0b5feba64002ecf1ed87a7fcfe4 SHA-256: 182c86c2cf89911373c2547e22f7684f7bb2fa2d654ff8824a0f5395d9ebb7cd
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 0.9996

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://dafemum.ru/strik?utm_term=gigi+jerseylicious+boyfriend+frankie PDF link annotation
    • http://rajajime.mypressonline.com/funutovu.pdfIn PDF document text
    • https://cdn.sqhk.co/rasepotobami/ayWIXIl/gopezazu.pdfIn PDF document text
    • http://sutobep.getenjoyment.net/jurnal_adiantum_sp.pdfIn PDF document text
    • http://dabinepoj.mygamesonline.org/18945058219.pdfIn PDF document text
    • https://cdn.sqhk.co/fuwufupi/ogcE9Cy/54379553758.pdfIn PDF document text
    • http://forecast.bet/bedadewh496v.pdfIn PDF document text
    • http://xazowagef.mypressonline.com/issb_bio_data_form_download.pdfIn PDF document text
    • http://kojijeku.mygamesonline.org/angielski_swka.pdfIn PDF document text
    • http://sedouche.xyz/96314232588y51q.pdfIn PDF document text
    • http://closemaze.com/sig_sauer_p229_iwb_kydex_holsterkllt6.pdfIn PDF document text
    • http://medtechnika1.ru/ruwubegevuvouibx.pdfIn PDF document text
    • http://bilkaita.space/sudazilojifekesorrhc4.pdfIn PDF document text
    • https://cdn.sqhk.co/zesokepewami/NMhjjdy/tokidowanumafexuzur.pdfIn PDF document text
    • https://cdn.sqhk.co/gitovera/jjdNFZP/tanktastic_3d_tanks_mod_unlimited.pdfIn PDF document text
    • http://nirenodeba.medianewsonline.com/fifefixikudevenokoviputi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://d5bea983-5bca-41ba-aae6-6b688785cc77.filesusr.com/ugd/9ec29b_15d80bc448fe4334b747438586a5915a.pdf?index=trueIn PDF document text
    • https://7fe1f042-206b-4735-a408-f56337efeeb4.filesusr.com/ugd/d34b51_52cd16cd46a648889a9ed64145a16b52.pdf?index=trueIn PDF document text
    • https://56db2a4d-09ce-4ff6-a558-abb1d6727cd4.filesusr.com/ugd/003b86_d7a34f875ef94156b02e906734518bec.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dazovosugev/poroxiseborukadoni.pdfIn PDF document text
    • https://4edd92ed-4e96-4c3d-a837-a16c7246ae9e.filesusr.com/ugd/7c3149_69a62e3d50b64c7a9cd3b5163eb48965.pdf?index=trueIn PDF document text
    • https://2e4d99de-9d37-4ce2-abd5-0bbccafdbe51.filesusr.com/ugd/33a2e4_1946ed82ca86461eaba097bac5c77eae.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/mexavofezoxi/how_long_does_it_take_to_learn_final_cut_pro.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_off000118f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118F8 5604 bytes
SHA-256: ab6f8ddc1d24b88ce66198be0fb6654fabc22ebd3b220271a545fe89b449a72a
font_01_sfnt_off00012c29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C29 11888 bytes
SHA-256: d3d7d275bbfb168dc7169fa7d0efbb7ffbdb8d921f7aad3061f03cb2b327add4

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