Malicious PDF — malware analysis report

Static analysis result for SHA-256 9cbc92b5f0d1cf6b…

MALICIOUS

PDF

75.4 KB Created: 2021-04-01 15:24:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 0da28ad3c309be4fada6b4a866ac1b33 SHA-1: 7457e16d66c8bd252572c33befdf38f6647abad2 SHA-256: 9cbc92b5f0d1cf6bff69d7a9495439d7710243d841f7b8075ec168293aa1ec0b
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 0.9996

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://jumiwimov.ru/award?keyword=apqp+ppt+pdf PDF link annotation
    • http://pefiworawodud.mypressonline.com/bibinipixikisik.pdfIn PDF document text
    • https://cdn.sqhk.co/dosakupu/hgzgWbG/space_ship_clip_art_drawing.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4496148/normal_5ff9c01f05b5b.pdfIn PDF document text
    • http://fituxem.sportsontheweb.net/44815425875.pdfIn PDF document text
    • https://cdn.sqhk.co/rutunidosaw/ifdgg9S/fuwevabata.pdfIn PDF document text
    • http://rabota-plus.club/10422266360myjr0.pdfIn PDF document text
    • http://center-san.ru/703408621107nq1j.pdfIn PDF document text
    • https://cdn.sqhk.co/sixojifez/hafjg6R/fidurodozosita.pdfIn PDF document text
    • http://murimubijejaba.mygamesonline.org/adjectives_list_en_ingles_y_espaol.pdfIn PDF document text
    • http://noncomform.space/79304282523up4xh.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465685/normal_6026e4ef3930e.pdfIn PDF document text
    • http://copyright-supporthelp.com/58188623806dnxxm.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370778/normal_60264d2a4935a.pdfIn PDF document text
    • http://canonsburglake.org/best_books_on_mental_toughness_in_sportshgruy.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/b209a132-74c9-4b48-91d8-41dd8d6b54ad/40361878484.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5718b8f7-2330-46ac-a825-905ba80e0f97/pakoxonibujofulabi.pdfIn PDF document text
    • http://wonanikapudidak.atwebpages.com/how_to_clean_a_thetford_toilet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/459a6ba5-701f-4499-a0aa-dfa3793ed526/gezekavumiwixe.pdfIn PDF document text
    • http://wivaxodi.onlinewebshop.net/paradise_lost_summary_in_urdu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/20a655b8-d30d-4685-871e-bba98fbc5f79/domozapilin.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/42127ddd-7ec3-4b9b-8172-7204898e0a81/75262787239.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5366bd1b-1439-481c-bf1d-f6f322e42e2f/the_bloody_chamber_book.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_off0000eb6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB6F 4636 bytes
SHA-256: 88abceb0605723e24bf9986879fda4d8f863e123d25ce444c30e75c2ddaafacd
font_01_sfnt_off0000fb4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB4E 11048 bytes
SHA-256: 08cceb29564f24705c80816667a04d1d5a4edf1e4bf1f24e93da88e650671d6f

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