Malicious PDF — malware analysis report

Static analysis result for SHA-256 53fe462b49263413…

MALICIOUS

PDF

68.4 KB Created: 2021-03-12 04:41:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: b80ccd0008b8ac27d63abeece70665a9 SHA-1: 86b21c29ae0a65fef79ba4cc8c74f9ace185e8b5 SHA-256: 53fe462b49263413e61d5e8f2bf6792a89b32cb2d53ce07292221c4dfa71288d
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with a significant portion pointing to disposable hosting and acting as a link farm, strongly suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection further confirm its malicious nature. While no scripts were explicitly extracted, the PDF structure and embedded URIs indicate an attempt to redirect users to malicious content.

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://jottigo.ru/wix?keyword=camp+walter+johnson PDF link annotation
    • http://guvinesusavilo.iblogger.org/9633610417.pdfIn PDF document text
    • https://nejavedejelije.weebly.com/uploads/1/3/4/3/134336697/6534685.pdfIn PDF document text
    • https://cdn.sqhk.co/pijujuweg/ihdJBhb/lego_hidden_side_2020_episodes.pdfIn PDF document text
    • https://xazojitov.weebly.com/uploads/1/3/1/4/131408465/difukonubifojig_kapewi.pdfIn PDF document text
    • https://cdn.sqhk.co/zogobadakedu/ege5Fnk/suvonobezi.pdfIn PDF document text
    • https://cdn.sqhk.co/dijowasedop/ZLNgekv/fiola_ceballos_age.pdfIn PDF document text
    • https://cdn.sqhk.co/gopuxipo/jjjcgc7/xesewanalevoribiwavalu.pdfIn PDF document text
    • https://cdn.sqhk.co/vulovosovem/Sgijbjc/piano_tiles_2_game_free_download.pdfIn PDF document text
    • https://laxukiwu.weebly.com/uploads/1/3/1/0/131070933/6467927.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/rovuweraja/23332575927.pdfIn PDF document text
    • http://lepomosafajuki.rf.gd/booklet_template_20_pages.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1e5c854d-0400-4c2c-9855-b6b39c9a09b8/78818203101.pdfIn PDF document text
    • http://mivogunav.rf.gd/fixur.pdfIn PDF document text
    • https://c4a5d104-04f9-44e6-b03f-1f5edac3680f.filesusr.com/ugd/f23921_8339740887b64c608d24da853bfba7db.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/eca89587-b7e8-48cf-9d40-dd96bd95373d/ziwowuwusikowijusisowe.pdfIn PDF document text
    • https://6c8027e1-9878-41b3-a9ef-32ba2b6bcd02.filesusr.com/ugd/185811_97e9020a2e0344aca2ddb9d02588e5fc.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/1d5f516a-010a-43c8-a01c-f2a949988941/94263088298.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b8ee7fd-6fbb-447a-ba56-1040a07459c6/operating_system_concepts_9th_edition_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/wewuxuviwar/s_chand_biology_class_9.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1516e53b-52af-417a-a09b-8890e79eeb7e/the_5_love_languages_quiz.pdfIn PDF document text
    • https://45f91bdd-2b68-4e60-ae2c-b14373ae5332.filesusr.com/ugd/0d089b_961a132efdef4d79a0e90275bc5955ca.pdf?index=trueIn PDF document text
    • https://1ffb5d6c-d890-49e0-9b87-dc10fbfa49e2.filesusr.com/ugd/8bc2a6_8dc3bcb6edf4425089401c071a4adc3d.pdf?index=trueIn 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_off0000d260.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD260 5132 bytes
SHA-256: 70c07de2d6725eaa896bb2b16e24438a6c3fd814353f26ae3c4ccb5b1957ba5f
font_01_sfnt_off0000e3b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3B1 9604 bytes
SHA-256: 44f63579cf740189dc348c2dfe8dc07a376edc0938b7a313f583a18eb7de0c56

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