Malicious PDF — malware analysis report

Static analysis result for SHA-256 8302f680b4df9dfe…

MALICIOUS

PDF

71.2 KB Created: 2021-05-12 06:50:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: e40887b2a699f300b293b3fea0d585a1 SHA-1: 58daf909fe294522e33e814e3da166334392ade2 SHA-256: 8302f680b4df9dfe16ceea23d11001c54bda0da067d964094964c912c1354221
126 Risk Score
Tags
free-cdn-ebook-manual-lure

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://golowaki.ru/strik?utm_term=2011+craftsman+lt2000+review PDF link annotation
    • http://forpost-electrica.ru/miramrcyzb.pdfIn PDF document text
    • http://larts.digital/kezawoxedepupyyqq2.pdfIn PDF document text
    • http://ukrinsure.com/how_to_train_football_by_yourselfkjcz5.pdfIn PDF document text
    • http://smartroom.pro/tulawunaxipoxokuva81s4w.pdfIn PDF document text
    • http://zanapipok.getenjoyment.net/fedanakuxaponoz.pdfIn PDF document text
    • http://mukinokelek.mygamesonline.org/31811945755.pdfIn PDF document text
    • http://changepass.online/ukulele_strumming_patterns_4_4d4fg6.pdfIn PDF document text
    • http://zememor.sportsontheweb.net/a_divina_comdia_resumo.pdfIn PDF document text
    • http://alkostore.xyz/pioneer_mosfet_50wx4_aux_not_working9cpu9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421478/normal_5fd066e5c3307.pdfIn PDF document text
    • http://tryraisins.pro/yard_machine_by_mtd_front_tine_tillery0y3m.pdfIn PDF document text
    • http://verifiedbadges-form.com/what_to_do_if_you_win_the_lottery_in_texas4mhip.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393028/normal_600353f653c09.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/ragejufa/el_secret_de_lalquimista_resumen_por_capitulos.pdfIn PDF document text
    • https://878ee1be-828d-48b9-a24a-84283cf66a1c.filesusr.com/ugd/86936c_00d5a8857e7e4e46a5e6088cd25bbec1.pdf?index=trueIn PDF document text
    • https://b5c90759-dbf8-4ccd-b12d-e23c958527f9.filesusr.com/ugd/915a55_a9fb9be0ad3d477ba42e0e48374268cb.pdf?index=trueIn PDF document text
    • https://74bb8966-1fc2-43cb-a641-24c20f380d28.filesusr.com/ugd/84c7b5_ff4ff87ed8e34774b8563c713da04b69.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zewimu/37422204217.pdfIn PDF document text
    • http://dapilejebuvone.atwebpages.com/wupabazijigotogebonupaju.pdfIn PDF document text
    • https://73b3f487-90f5-41a6-bf44-750372f72efd.filesusr.com/ugd/39e8d0_cc98ad97f8b446fe9176fec321ded2d1.pdf?index=trueIn PDF document text
    • https://627ea4a7-3f28-4bf3-8c99-6a9da7dacf48.filesusr.com/ugd/1970e2_901ffd9d59c04ca7a6eb20060dee252d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jamuluvuvava/metal_furring_ceiling_installation_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/loneminovu/what_is_the_plural_form_of_bacillus.pdfIn PDF document text
    • https://s3.amazonaws.com/wejuvono/godofemolepuki.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_off0000d86b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD86B 5408 bytes
SHA-256: f6c2ff29869ba7251ace3d0054f930de452e9237d5338e12caeed95464e503ed
font_01_sfnt_off0000ead3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAD3 10812 bytes
SHA-256: d31e29908aef52e59c542de4db5a1ce44d4c2a4b3377c15f976cca8bbc07b084

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