Malicious PDF — malware analysis report

Static analysis result for SHA-256 953fa72b9e927012…

MALICIOUS

PDF

87.8 KB Created: 2021-03-15 12:05:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: c1c8b66ad563ddad28afe91db7488010 SHA-1: 9fcd74e6530e90133897750bbdd1d8b37aa37f08 SHA-256: 953fa72b9e927012c4800f8b6a2f686a9b7498e3500ea669ae3e9fa8566bbb5e
134 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

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 and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://dafemum.ru/wix?keyword=skmei+1163+user+manual PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4469630/normal_602e8565617ae.pdfIn PDF document text
    • http://zipogagu.iblogger.org/23400200198.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417314/normal_604dbdcd9a781.pdfIn PDF document text
    • https://cdn.sqhk.co/wuwoxegolewa/Fjaxk4Y/low_cost_airlines_flying_to_egypt.pdfIn PDF document text
    • http://rivozuzeno.mywebcommunity.org/20855343516.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366947/normal_600f47f3ccbd3.pdfIn PDF document text
    • https://cdn.sqhk.co/lisakopew/Lgibid5/baxafemijepegijezoko.pdfIn PDF document text
    • https://cdn.sqhk.co/perokokamosa/dAihia1/bluffing_party_games.pdfIn PDF document text
    • http://vsedlyatebya.xyz/3502995691025wm4.pdfIn PDF document text
    • http://begimewabifax.getenjoyment.net/44566309829.pdfIn PDF document text
    • http://figimumagoko.mygamesonline.org/25341911426.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452861/normal_5fdd3aa3c6ea3.pdfIn PDF document text
    • https://cdn.sqhk.co/kososojog/NhfWCje/chatting_stickers_for_whatsapp_funny.pdfIn PDF document text
    • https://cdn.sqhk.co/sosobigawe/xidcMgg/.pdfIn PDF document text
    • http://domainlimax.xyz/problemas_sociales_en_mexico_y_el_mundoc71kn.pdfIn PDF document text
    • http://morpeoplelife.ru/godoxakovd6v6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427821/normal_5fd8224e15827.pdfIn PDF document text
    • http://towufato.mywebcommunity.org/does_chris_live_in_get_out.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://5efcf519-4c71-4be9-a00f-e1d47ba804c5.filesusr.com/ugd/ebcc4b_90ba540ee58346c9945accf81f74520b.pdf?index=trueIn PDF document text
    • https://6d251753-49d0-4f5b-a278-10ed1cacc9d0.filesusr.com/ugd/5c139a_7ae4241f802f4d1a9e427e83d8eb466a.pdf?index=trueIn PDF document text
    • http://nuluwajewugutik.onlinewebshop.net/69144393230.pdfIn PDF document text
    • http://pevitonorefiz.epizy.com/bangla_romantic_natok_2017_free.pdfIn PDF document text
    • http://vemewef.rf.gd/maiden_voyage_sea_of_thieves_commendations.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_off0001043b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1043B 2912 bytes
SHA-256: 1baa3efd180cf5f44d613abe34ea0380c2d25dd221f4ef864ac418d56f73cc35
font_01_sfnt_off00010e97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E97 5368 bytes
SHA-256: c1698227d328a15a55c552d1ae669010fe03a92630ab6cc0206f23944ceccf3c
font_02_sfnt_off000120c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120C4 14808 bytes
SHA-256: 7b31453e15eeec3636d1cb13c883e82a53ff859bf59ee022b5dde0d149c68bd7

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