Malicious PDF — malware analysis report

Static analysis result for SHA-256 807101be6de732bd…

MALICIOUS

PDF

115.7 KB Created: 2021-05-14 22:03:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: bc2fbc13a03773f43f2ccc3789650007 SHA-1: 72e24060f2abffeed58042e0dd5269a9ce6079e5 SHA-256: 807101be6de732bdfcb880df1c2a46b816382838915c14a8433fdfac7fee6f89
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 0.9994

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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=moon+river+jj+heller+piano+chords PDF link annotation
    • http://mini-cam1.club/minuet_in_g_majoryz2bk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380084/normal_601425909de67.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457318/normal_6032516de2cf7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450243/normal_5fddcc690e33b.pdfIn PDF document text
    • http://interstart.online/android_vulnerability_scanner_kalihoh6f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479433/normal_6066f4c2072c9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4466379/normal_5fc5b12290c81.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462376/normal_60618253b37b9.pdfIn PDF document text
    • http://ritowozotemazo.22web.org/30312167306.pdfIn PDF document text
    • http://ewop.space/download_gta_vc_liteyk407.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379974/normal_601e49849f0ae.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367674/normal_5fe9f5f0b3d29.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pijularof.epizy.com/buzzards_bay_fishing_report_2018.pdfIn PDF document text
    • http://vatimofaxemog.rf.gd/fukonigujisosuketamafe.pdfIn PDF document text
    • https://s3.amazonaws.com/boxalewijim/diffraction_grating_questions_and_answers.pdfIn PDF document text
    • http://votofowum.epizy.com/how_to_get_a_free_trial_of_nfl_sunday_ticket.pdfIn PDF document text
    • https://s3.amazonaws.com/wusone/the_art_of_the_deal_book_summary.pdfIn PDF document text
    • https://s3.amazonaws.com/wopari/casio_fx-9750gii_games_pokemon.pdfIn PDF document text
    • https://b7c6a474-53ed-4139-af63-4b2f501ae0e7.filesusr.com/ugd/e87294_c577abc727cf418b8aab81f91c1c9ca2.pdf?index=trueIn PDF document text
    • http://bupomejov.epizy.com/36803055278.pdfIn PDF document text
    • https://s3.amazonaws.com/mesixadelomomo/jomaridojupejuvetum.pdfIn PDF document text
    • https://s3.amazonaws.com/retobifulipo/bodine_elementary_school_uniform_colors.pdfIn PDF document text
    • https://1c54689f-8f60-44d8-8d81-b144d6ea8ada.filesusr.com/ugd/787b0a_a655786a25ee4606bbbbebe1afaf0758.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_off0001876b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1876B 5304 bytes
SHA-256: f372a6748a7489b198929afcdb277cb3900660ec23e478b54e75988558f87b9d
font_01_sfnt_off0001997e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1997E 11656 bytes
SHA-256: 8f2712443d26b3e71ca62f664c9d73ea3fff87f465a961bb16765fd1874b6aab

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