Malicious PDF — malware analysis report

Static analysis result for SHA-256 2608c9c08ad1cdcc…

MALICIOUS

PDF

116.3 KB Created: 2021-04-28 13:02:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: f7e75ac538ed43b841ae00a9fb5dbcb7 SHA-1: 9abd520e0e98bb84312fdf092fc9fd9c43e92946 SHA-256: 2608c9c08ad1cdcc153b1922e32caeaa7549c115cd011ccb753c6e862fa4604f
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 0.9994

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://nipisod.ru/strik?utm_term=focused+acceptance+and+commitment+therapy+pdf PDF link annotation
    • http://0fruits.space/beat_saber_android5jpoj.pdfIn PDF document text
    • http://sisogelodaze.medianewsonline.com/dosekejebuluwawu.pdfIn PDF document text
    • https://munibejexa.weebly.com/uploads/1/3/1/4/131414516/d4ce10bf.pdfIn PDF document text
    • https://gikanirirexenad.weebly.com/uploads/1/3/0/7/130776133/zegexurekupatereset.pdfIn PDF document text
    • http://jorowijedo.mywebcommunity.org/como_aprender_a_leer.pdfIn PDF document text
    • http://www-sfr-fr-monespace.com/gujefusuxivexaf6odg.pdfIn PDF document text
    • http://zokidinodajives.getenjoyment.net/hemolytic_anemia_2020.pdfIn PDF document text
    • https://vasiwamalag.weebly.com/uploads/1/3/4/0/134012587/vuwefebifisiba_zirif_jupigedimetaxan.pdfIn PDF document text
    • http://kobopez.mygamesonline.org/short_stories_in_english_for_babies.pdfIn PDF document text
    • http://towufato.mywebcommunity.org/beating_the_street_free.pdfIn PDF document text
    • http://mokemowowove.mygamesonline.org/factoring_binomials.pdfIn PDF document text
    • http://urott-hu.com/word_order_sentences_exercises_onlineewlvt.pdfIn PDF document text
    • https://jamakebowixon.weebly.com/uploads/1/3/4/4/134477175/483478.pdfIn PDF document text
    • http://fodekofuxuvum.sportsontheweb.net/liwak.pdfIn PDF document text
    • http://najetaxu.mygamesonline.org/javapamevatekinu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/c900cae6-28bb-4221-845d-9ff10700e465/70616860371.pdfIn PDF document text
    • http://kakekixidowaj.rf.gd/akuntansi_pajak_atas_piutang.pdfIn PDF document text
    • http://duxepivol.myartsonline.com/managing_oneself_peter_drucker_book.pdfIn PDF document text
    • http://fajenadiwizowo.atwebpages.com/zirinirarazowoxib.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/109dab61-e4cc-4783-a92a-3e63a2b56cc2/tizetagobog.pdfIn PDF document text
    • http://jagaxuvu.epizy.com/35043150579.pdfIn PDF document text
    • http://lorenivi.rf.gd/tijokeworotedolaw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9705bfdf-1194-4334-a85e-b1a1016d0e4d/vufuziwibamamazijirojozen.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_off000185ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x185ED 5420 bytes
SHA-256: 9ae5d9b078c9e5c921f816d339eef2c75f677b044617adcc7b6317c8d1704afb
font_01_sfnt_off00019840.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19840 12268 bytes
SHA-256: 66dcd9d16def79aebae3e5079c4f86ec560c0af5b6edf4e7cd3ef5cb7d29d6f1

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