Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b5480899491bb26…

MALICIOUS

PDF

80.5 KB Created: 2021-03-27 10:43:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: ba963765c54c875041dd975d135f54e7 SHA-1: 93bf98ff7aa13faaa781da51a340c435e5870436 SHA-256: 3b5480899491bb269a940d7dae7a9309f687d2b677cc33ae646ea8321d2f5f54
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 0.9996

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/wix?keyword=instant+keto+reviews+shark+tank+update PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4406241/normal_604d7c1becedc.pdfIn PDF document text
    • https://vosaxoro.weebly.com/uploads/1/3/4/4/134469305/vuzedufiwodefig_bivedexupol.pdfIn PDF document text
    • https://kifeketefisub.weebly.com/uploads/1/3/5/3/135347095/5bb2c4e3812f.pdfIn PDF document text
    • http://fb-ig-copyright.com/asus_command_softwaregvmcs.pdfIn PDF document text
    • http://vash-fasad.live/pathways_to_math_literacy_2nd_editionajdec.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446045/normal_5fd7bf79b50d6.pdfIn PDF document text
    • https://puvudidaf.weebly.com/uploads/1/3/4/2/134266954/sibewiboreluzev_rogisif_bibezijovegago_winafosugisija.pdfIn PDF document text
    • http://artelamp.store/dodadilopefajidopev19ri.pdfIn PDF document text
    • http://salopkisa.website/zufevokusorcahpm.pdfIn PDF document text
    • http://getsol.xyz/lokatebiwadevpew0q.pdfIn PDF document text
    • https://jujoxiro.weebly.com/uploads/1/3/4/8/134875196/romegigeninal-bijiw.pdfIn PDF document text
    • http://uaportal.site/tasezubo95qox.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476954/normal_60047c6a912d6.pdfIn PDF document text
    • http://polfact.site/2277696569470w2i.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374703/normal_60218585a1662.pdfIn PDF document text
    • http://com-signto5.xyz/candesartan_available_dosage_formsn2cae.pdfIn PDF document text
    • http://crawlmqyu.space/potitititiganafigalixix89q2g.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365642/normal_5ffd6027321e6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490961/normal_6007b196c56d7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/belopudevuzuza/angular_4_file_from_url.pdfIn PDF document text
    • https://s3.amazonaws.com/figidireki/69639408847.pdfIn PDF document text
    • https://s3.amazonaws.com/bikikanafopavu/fuel_economy_guide_2015.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_off0000fb51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB51 5168 bytes
SHA-256: 52445259d3c4655ddf3bc64e7c999d88d6e35916d97aa5f90d40c3f61b0db0a1
font_01_sfnt_off00010cf5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CF5 11860 bytes
SHA-256: 05f0f14ac05036e06ce604556b767a58f9a22d0d5286719dd88e8c3c4fa4ec1e

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