Malicious PDF — malware analysis report

Static analysis result for SHA-256 38da112b1eb3e497…

MALICIOUS

PDF

85.8 KB Created: 2021-05-14 00:24:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: d25b9a7db678d15c0b8d6bd85ec19f26 SHA-1: 2b92a64802fa60d2d29f9dd83a18e3998bae800b SHA-256: 38da112b1eb3e4970644ce350c98145d99477d58bec276443ee5db313275b2f5
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 0.9998

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://pelibifir.ru/strik?utm_term=twilight+breaking+dawn+soundtrack+part+1 PDF link annotation
    • https://cdn.sqhk.co/xunijejozi/gjbsbie/regency_theater_perris_california.pdfIn PDF document text
    • https://cdn.sqhk.co/fujotojaxob/jgIhcVV/pidata.pdfIn PDF document text
    • https://cdn.sqhk.co/tiviluluje/hchaguu/45452922147.pdfIn PDF document text
    • http://rejemezurufoveg.mywebcommunity.org/xutevoxage.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416153/normal_60460897a0b8c.pdfIn PDF document text
    • https://cdn.sqhk.co/xivovido/icig5jc/cruise_vacation_planner_template.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459329/normal_604a82a32884e.pdfIn PDF document text
    • http://jaxagogilexet.sportsontheweb.net/xelorijajutefemijavupix.pdfIn PDF document text
    • https://cdn.sqhk.co/midijanere/gjeJhdI/study_skills_definition_life_orientation_grade_10.pdfIn PDF document text
    • http://zulesaxeririv.sportsontheweb.net/pathophysiology_of_diabetes_mellitus_2020.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nafezot.epizy.com/what_is_the_difference_between_logos_and_rhema_word.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fdf9a929-91e5-4692-91eb-c792c028edf2/what_to_do_when_command_r_does_not_work.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d0ffb996-701d-40e8-b1d4-ea282c996c07/38728981197.pdfIn PDF document text
    • https://s3.amazonaws.com/nufidibodudulad/love_status_video_mp4.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2dc112be-bab8-42e7-b42b-20736149fc55/coleman_powermate_generator_owners_manual.pdfIn PDF document text
    • http://nozaleb.rf.gd/colorectal_cancer_screening_guidelines_2018_medicare.pdfIn PDF document text
    • https://s3.amazonaws.com/xewamejixolefaj/waterpik_ultra_water_flosser_aquarius.pdfIn PDF document text
    • http://dodarululi.epizy.com/converting_millimeters_to_meters_worksheet.pdfIn PDF document text
    • http://xomapagovujux.atwebpages.com/sozixaf.pdfIn PDF document text
    • http://rixuroruwe.myartsonline.com/fofapedekixolegexo.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_off00010ffa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FFA 5632 bytes
SHA-256: 8ccc04dd8e52083f7102e29978e150db90132a9f322ffaa71224973ffc7a4bb6
font_01_sfnt_off0001232b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1232B 11692 bytes
SHA-256: 4ee004c66615d75759ad948e4f7b10e6ca71e52af3dfd859598f16029b4f7362

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