Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d223d47a4492d3b…

MALICIOUS

PDF

77.0 KB Created: 2021-06-01 11:11:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: fcaa652cb975d24454a387b2435dae68 SHA-1: 162cf89593af651371519d74bae864d2a6e9f000 SHA-256: 1d223d47a4492d3bc47b6c5a83eb37cccadd89d4b448eaf5aa26ac14c0b75fed
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 0.9993

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://ponafet.ru/123?utm_term=disconformidad+alta+medica+inss+plazos PDF link annotation
    • https://gosibipidumoduj.weebly.com/uploads/1/3/4/3/134318513/nudemid-najumiradi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378153/normal_5fc5732744a74.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4401712/normal_60b09bcbd90d3.pdfIn PDF document text
    • https://wedikeme.weebly.com/uploads/1/3/1/6/131606111/jitibu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470982/normal_603c0b36a929c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446638/normal_604f1536e48b4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369494/normal_5ff470bdcb541.pdfIn PDF document text
    • https://wivusogonelom.weebly.com/uploads/1/3/5/3/135310870/6556663.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dipoziw.pbworks.com/f/longman_preparation_course_for_the_toefl_test_ibt_second_edition_download.pdfIn PDF document text
    • http://wiwedano.pbworks.com/f/13054853981.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/21de406f-514d-463a-9487-3faaff51f95f/12910253779.pdfIn PDF document text
    • http://volikedejefa.pbworks.com/w/file/fetch/144420996/siwin.pdfIn PDF document text
    • http://siwuromo.pbworks.com/f/twilight_saga_part_3_full_movie_in_hindi_dubbed_download.pdfIn PDF document text
    • http://pazimonofe.pbworks.com/w/file/fetch/144450819/oh_lord_my_redeemer_sheet_music_free.pdfIn PDF document text
    • http://finebov.pbworks.com/f/motion_for_reconsideration_sample_for_bidding.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7e1c9dbc-0afa-4ebf-b905-1f5efeed6c85/nursing_diagnosis_examples_for_pain.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/01cd0623-0d29-4044-8554-b3e5ac09126b/hector_berlioz_symphonie_fantastique_fifth_movement_dream_of_a_witches_sabbath.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2b8938fb-571e-4d8d-b4a9-4f16e6d07d96/savewoxuneninize.pdfIn PDF document text
    • http://fadoposapat.pbworks.com/w/file/fetch/144445113/12754240129.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/df232135-1aae-48e2-9013-8d601d11de81/what_does_here_i_am_send_me_mean.pdfIn PDF document text
    • http://gosirata.pbworks.com/f/the_other_side_greatest_showman_piano_sheet_music_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7b66fa14-0c18-4290-a062-c57f4e23da59/bukowo.pdfIn PDF document text
    • http://xosufixemuf.pbworks.com/w/file/fetch/144449694/9912602118.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_off0000ece4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECE4 5352 bytes
SHA-256: d4f4db1a13f17a66bd484e49bb3a0693e64ee63ecd89fd9f2188e75aa784b675
font_01_sfnt_off0000ff0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF0C 11628 bytes
SHA-256: 5cb421ac4cc8739f206e3f95714cc3d1b49006b53f434cf2509f6eba49882801

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