Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e4299e7ff413451…

MALICIOUS

PDF

160.6 KB Created: 2021-03-25 01:25:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: e347701a43ae986a19ef948a9108842d SHA-1: 872fee06fd3c3dd140f2db8d75f827468caac9ce SHA-256: 8e4299e7ff413451cff6ab9490d402c4605683726a8b199652dcfff7d1f9a791
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 0.9990

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://seumenha.ru/strik?utm_term=the+tempest+full+text PDF link annotation
    • https://zemexiwum.weebly.com/uploads/1/3/4/3/134330210/7ef35ac728ffd5.pdfIn PDF document text
    • http://lifolibi.sportsontheweb.net/99024623356.pdfIn PDF document text
    • http://pycnidwzxc.info/decode_and_conquer_free_downloadvsrq5.pdfIn PDF document text
    • http://eeuuurrrrr.space/zesajurazemifajafuzurc1ty3.pdfIn PDF document text
    • https://xemakoxen.weebly.com/uploads/1/3/4/3/134320116/giselujawitoweg-nozasopevuv-xefevudamuv.pdfIn PDF document text
    • https://fotavimapuwe.weebly.com/uploads/1/3/2/8/132816041/misozixeluwutom-veriwotaloj-garujokemug.pdfIn PDF document text
    • https://jefibapo.weebly.com/uploads/1/3/2/7/132712451/c8c0454a.pdfIn PDF document text
    • https://muzokive.weebly.com/uploads/1/3/4/4/134498707/sijal.pdfIn PDF document text
    • https://sawisede.weebly.com/uploads/1/3/2/6/132681865/lokejobuzibos.pdfIn PDF document text
    • https://wifadesar.weebly.com/uploads/1/3/5/3/135345928/sixuwitotonivomujute.pdfIn PDF document text
    • http://thefortykuti.com/35036108712y26bv.pdfIn PDF document text
    • http://tulusujubige.mygamesonline.org/84774962131.pdfIn PDF document text
    • http://xaraxag.mypressonline.com/miwilamivudetorixolixa.pdfIn PDF document text
    • http://lazokiwumemo.mygamesonline.org/automated_guided_vehicle_project.pdfIn PDF document text
    • https://zuxevuzefadum.weebly.com/uploads/1/3/0/7/130775429/duviburokavewob.pdfIn PDF document text
    • https://xuniwinasifobip.weebly.com/uploads/1/3/5/3/135302293/vebakegivumimadat.pdfIn PDF document text
    • https://vuteduwezo.weebly.com/uploads/1/3/4/3/134336695/6653253.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://0115c081-d8bc-4983-a705-81db93bf1442.filesusr.com/ugd/990402_f62d6edb4eff46239b81ce28638a8c32.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/f71d64cd-899a-4877-8e31-6d47b881e4ae/rhetorical_devices_used_in_sinners_in_the_hands_of_an_angry_god.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d95e1979-3369-4919-b7b5-d077a155911d/pixokibubom.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1eccd79b-8f80-4b68-9a16-8d1a29cfee6a/sigewokiwuteseso.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6a108e3b-dd09-4aa0-9b90-5377c3be7a3c/2292592550.pdfIn PDF document text
    • https://d102a0f2-001f-4998-bb0a-88ac30ac05b5.filesusr.com/ugd/771ea4_85689d1a353940c3835f7af53a758b91.pdf?index=trueIn PDF document text
    • http://kubowulurarekij.myartsonline.com/estructura_del_cerebro_humano_y_sus_funciones.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3e6287a7-47a3-4463-b7ca-7c96a6a9ab40/64544797420.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_off000240af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x240AF 4852 bytes
SHA-256: 1d172f29058740ffc2aab42c4e9e41de5a80bc7fd060734dd02b8ac9bbfa1bfc
font_01_sfnt_off00025113.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x25113 10360 bytes
SHA-256: 162d657be4851526020d2326287da20facdc60ba53632349942f1e137fe367dc

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