Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e09e55e71eaccd5…

MALICIOUS

PDF

71.7 KB Created: 2021-03-05 20:39:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 86e97654c97460261beee56b7aa6a29a SHA-1: 5049afa5a8799ba341c699421a4cf6cbf918f50d SHA-256: 9e09e55e71eaccd51fbcec1dd14f343c56bf14448c20517e964753ffaf3070ff
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 0.9998

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://jottigo.ru/wix?keyword=find+local+women%2527s+football+team PDF link annotation
    • http://pekikanelobe.22web.org/75887754702.pdfIn PDF document text
    • http://mevatupumave.22web.org/82422487325.pdfIn PDF document text
    • http://konufij.22web.org/suwerutas.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417312/normal_602fcf5f264b5.pdfIn PDF document text
    • http://ruzoboxilotazex.22web.org/the_game_plan_full_movie_mp4_download.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4493541/normal_5fcbbb8b289ef.pdfIn PDF document text
    • http://pasozabijegigus.iblogger.org/nevonuwobisikajefo.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/1307315a-1021-4bce-b421-e63de212dbfb/romeo_and_juliet_1996_full_movie_online_putlockers.pdfIn PDF document text
    • http://temitugefowe.epizy.com/barongan_bisa_bergerak_sendiri.pdfIn PDF document text
    • http://towuvoti.epizy.com/libitowali.pdfIn PDF document text
    • https://s3.amazonaws.com/tobojelusiwi/manual_do_ar_condicionado_portatil_consul_facilite.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/52ea45ab-1a12-49c6-9f69-e868f97ebef9/why_is_my_aux_cable_not_working.pdfIn PDF document text
    • http://benepuru.epizy.com/butyro_refractometer_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/50439765-961c-4ae4-808d-cfc7f2b1a3bd/sword_fighting_vr_games_oculus_quest_2.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a3257e7d-788a-47eb-ba54-8c2d12edb4bf/vojunezevo.pdfIn PDF document text
    • http://pidezesu.rf.gd/5571960702.pdfIn PDF document text
    • http://modiwina.epizy.com/pimimi.pdfIn PDF document text
    • http://rabepubi.rf.gd/fenizuboxu.pdfIn PDF document text
    • http://lurosanonit.epizy.com/vafipisuwegidupufuloka.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_off0000dc83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC83 5292 bytes
SHA-256: b10b2e9efd2e358a412481b96ecaa3fc6cc68e9221a7d5a501c748add2a783b8
font_01_sfnt_off0000ee92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE92 10336 bytes
SHA-256: 5279e9d76232b47dd441af139a467917db4ce8570731562bf0d84f0741d76142

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