Malicious PDF — malware analysis report

Static analysis result for SHA-256 582015e4aa1f873f…

MALICIOUS

PDF

76.6 KB Created: 2021-03-14 11:37:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 72f27b6e3bfd1e535bd0ac16b5136887 SHA-1: 12e932f9194d071ee7bcdbbc494132a30f1b5182 SHA-256: 582015e4aa1f873f5f6ec60f369d23a50a9a594c486828cbf3019d38ab9ea49c
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 0.9997

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/strik?utm_term=how+to+tell+if+the+furnace+thermostat+is+bad PDF link annotation
    • http://jifarobajis.sportsontheweb.net/john_dewey_progressive_education_movement.pdfIn PDF document text
    • https://cdn.sqhk.co/lasetipulos/s2Vhifi/android_textview_background_color_alpha.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370266/normal_601a381395abb.pdfIn PDF document text
    • https://cdn.sqhk.co/puxolika/jjcXzxZ/74065415714.pdfIn PDF document text
    • http://vudasuti.mygamesonline.org/someone_like_you_van_morrison_lyrics_deutsch.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4492286/normal_600bf9a029adf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482191/normal_6037a75e87ffb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416653/normal_5fd7312d394e7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://2aa89031-56ac-4de1-b828-aabe99840ec8.filesusr.com/ugd/cf14a4_caaa9338178f482e844c11031ed67ee2.pdf?index=trueIn PDF document text
    • https://dc273c12-e125-4738-b2e6-b96bc4bd5eb7.filesusr.com/ugd/c8df25_24ebadda0fdd49d49b3fe764a8a1e1e6.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wifiduxezo/ansible_render_template_locally.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/966141ab-d090-46db-b3b8-252dbca8f455/what_are_the_best_standby_generators.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0bca96e6-e66a-4921-bd62-c8a6d0e43f1d/tetiti.pdfIn PDF document text
    • https://s3.amazonaws.com/nupotukig/powidevubovamerar.pdfIn PDF document text
    • https://s3.amazonaws.com/kegovev/daditinolusisar.pdfIn PDF document text
    • http://tofujuwo.onlinewebshop.net/gmat_reading_comprehension_book.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9e00eae3-996e-4792-840a-1465ef6a0c09/what_is_the_best_radar_detector_on_the_market_2020.pdfIn PDF document text
    • https://ab737b70-891a-4a1f-8db9-ee548211cb31.filesusr.com/ugd/ce14f3_90fcecccc76f4817a7eae3ee3be2e9f9.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fipijife/buraletejesupodumajepebu.pdfIn PDF document text
    • https://s3.amazonaws.com/gurupixabogivaz/tchaikovsky_canzonetta_sheet_music.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_off0000ef1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF1A 5452 bytes
SHA-256: 025e831dbefe4f15b59cddb6100ed224d8d07a1792c8afeb0d43901c3a0767a6
font_01_sfnt_off00010185.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10185 10464 bytes
SHA-256: 5d9e9ea33a5e966698af8d70ae90e0f051f9114a90c407f4088c5a5733da3d74

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