Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ef4d3e00ecedf0b…

MALICIOUS

PDF

79.3 KB Created: 2021-03-15 05:17:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: a7f6220765d1c09f338cd063ccb60c26 SHA-1: e4999c4c8b7f4e197bdc586fd29c3ecbc5b0a52c SHA-256: 0ef4d3e00ecedf0bf820de5883ab0d18f401946b7dc88f75ee41165d45c0d151
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 0.9995

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://vilenefex.ru/wix?keyword=metodo+konmari+pdf PDF link annotation
    • https://cdn.sqhk.co/tivuzofep/6gegfha/16470657004.pdfIn PDF document text
    • http://xusatekekosigi.iblogger.org/hillsong_worship_songs_mix.pdfIn PDF document text
    • https://tubenuluni.weebly.com/uploads/1/3/1/4/131437864/supatetefidujaru.pdfIn PDF document text
    • https://cdn.sqhk.co/vutowogipu/eHFiirz/71735010827.pdfIn PDF document text
    • https://niritamin.weebly.com/uploads/1/3/4/4/134486676/kipumamasaba_zafug_mofakigituki.pdfIn PDF document text
    • https://cdn.sqhk.co/lojibuwe/higY4bC/fekekalanesitowa.pdfIn PDF document text
    • https://kewejalafu.weebly.com/uploads/1/3/5/3/135329801/df4687.pdfIn PDF document text
    • http://xopopiniruf.iblogger.org/how_long_does_it_take_to_learn_r_programming_language.pdfIn PDF document text
    • https://cdn.sqhk.co/livaxipovage/FjcvXgf/69270608202.pdfIn PDF document text
    • https://wumibatolazonik.weebly.com/uploads/1/3/1/4/131437616/f0c0fa7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448339/normal_601aec1f45e4e.pdfIn PDF document text
    • http://surisetufuna.iblogger.org/you_are_my_world_quotes_for_husband.pdfIn PDF document text
    • https://cdn.sqhk.co/tavimuxeju/iam5ghG/lapuxisatapimabarigib.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4391921/normal_5ff784a002c08.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/68c66713-3aa2-4dcd-8142-55f8fb51af65/92447887795.pdfIn PDF document text
    • https://s3.amazonaws.com/geraromu/pulezeziponox.pdfIn PDF document text
    • https://s3.amazonaws.com/kizugokofo/27802410010.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1d66c40c-6e61-4d3e-88d9-28354e681b90/engineering_mathematics_2_syllabus_anna_university_regulation_2017_mcq.pdfIn PDF document text
    • https://s3.amazonaws.com/serogajugomiji/how_can_you_heal_your_body_with_your_mind.pdfIn PDF document text
    • https://s3.amazonaws.com/salosibejodod/automation_studio_6._0_full_crack.pdfIn PDF document text
    • https://s3.amazonaws.com/zukogi/zufudoganefagejeze.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d780389d-6788-4e87-8fc5-1fc641a24a1b/how_much_does_an_aircraft_engineer_get_paid.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e262.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE262 4832 bytes
SHA-256: 7605e5995312259c1b9051dc22c895aff3fc5bf32cdfe62453dc52002eb2764d
font_01_sfnt_off0000f2b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2B5 15140 bytes
SHA-256: 7fba55bc6607193ead0c36488673733647f2ee84fff07e4ee579bdc891092a5e
font_02_sfnt_off00012218.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12218 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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