Malicious PDF — malware analysis report

Static analysis result for SHA-256 c3bed8ae077cf2ff…

MALICIOUS

PDF

75.4 KB Created: 2021-03-08 15:57:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 8ebeebe4e5a430e7c97d0452816bc911 SHA-1: 6c5d150de94f5815d07feda30badbed35fd36313 SHA-256: c3bed8ae077cf2ff0242dc15026200a028e2bc7c5479b92feef1be3893017dfa
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://nipisod.ru/strik?utm_term=war+of+the+worlds+season+2+air+date PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4383794/normal_60447a330a704.pdfIn PDF document text
    • http://itravelgr.com/bum_chiki_bum_bum_songbtbt2.pdfIn PDF document text
    • https://bovaromekefa.weebly.com/uploads/1/3/4/4/134403346/4538989.pdfIn PDF document text
    • https://gugukufetufa.weebly.com/uploads/1/3/4/3/134337187/sokusovatudetixes.pdfIn PDF document text
    • https://cdn.sqhk.co/pifonode/ajn9kji/never_have_i_ever_netflix_cast_season_2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392661/normal_5fe5991da188c.pdfIn PDF document text
    • https://cdn.sqhk.co/zunezafi/ajaghje/digital_marketing_business_applications.pdfIn PDF document text
    • https://cdn.sqhk.co/vizoxaxijojo/whhhdKz/caponata_siciliana_ricetta.pdfIn PDF document text
    • http://zdorovienashevse.xyz/56614478458r3hb6.pdfIn PDF document text
    • http://redpandarecycling.com/82568274230sdjr6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fovafejixafixon.rf.gd/what_is_the_weapons_cheat_for_gta_5_ps4.pdfIn PDF document text
    • http://weketabafizevu.epizy.com/xumoruziwutomebud.pdfIn PDF document text
    • http://wigazimo.epizy.com/twitter_video_er_apk.pdfIn PDF document text
    • http://datasixiva.epizy.com/radosalasemutumolo.pdfIn PDF document text
    • https://1fa67a36-2e8b-44cc-a955-751d80433762.filesusr.com/ugd/d85e51_e2bcf5d08ae744829e811c2355830f69.pdf?index=trueIn PDF document text
    • https://945b3f91-9c76-4178-be32-f0dab3cfe2c6.filesusr.com/ugd/8d5d69_5862ffbe97594e6e8c4aac43c10ce400.pdf?index=trueIn PDF document text
    • https://9c43cb74-45e3-47de-9527-fda2e8336169.filesusr.com/ugd/af0aa9_0d68aab5858b42628e74fecfa40a618a.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_off0000ea9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA9D 5232 bytes
SHA-256: f3f9704d309681d0d0f7713932181c5341c2c8539d9ec82f4408849f9c5e4f35
font_01_sfnt_off0000fc7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC7E 10540 bytes
SHA-256: 856f2086187a003bff2e35fe8be588b2bb71ff4ebaae0922de79eebd1d37992e

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