Malicious PDF — malware analysis report

Static analysis result for SHA-256 3823688a92221285…

MALICIOUS

PDF

82.4 KB Created: 2021-04-16 00:15:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 0194ec83d944787bb3ec4587894b5f3c SHA-1: 552c68a4b04f1478a921aa6494db35f27c04f570 SHA-256: 3823688a92221285b724e9d04331a0cba8cf890cfe8e166edb7e7e2fcd144b2b
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

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 0.9991

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://fokemale.ru/strik?utm_term=why+was+the+great+society+important PDF link annotation
    • http://respect-ltd.su/entity_relationship_diagram_excel_templateip462.pdfIn PDF document text
    • https://mazaxijav.weebly.com/uploads/1/3/4/4/134488449/4170332.pdfIn PDF document text
    • https://bikigevoxepasi.weebly.com/uploads/1/3/4/7/134716722/gavopovinujusi_sorut_vafup.pdfIn PDF document text
    • https://minomawisagu.weebly.com/uploads/1/3/5/9/135956859/rusebikulubajawu.pdfIn PDF document text
    • http://phillipen.online/96157150666mjfhi.pdfIn PDF document text
    • https://pofekabebo.weebly.com/uploads/1/3/0/7/130739116/menozuzujomesivobewu.pdfIn PDF document text
    • http://dusexixegiseves.iblogger.org/dipropionato_de_betametasona_bula.pdfIn PDF document text
    • https://donurufeto.weebly.com/uploads/1/3/4/8/134898164/gobedavisuraw.pdfIn PDF document text
    • https://xujokutiw.weebly.com/uploads/1/3/4/7/134749543/sulalamikuxuvot.pdfIn PDF document text
    • http://physcoo.com/computer_full_form_in_english_wikipediaggg95.pdfIn PDF document text
    • https://neruzubegakakew.weebly.com/uploads/1/3/4/0/134017499/5455167.pdfIn PDF document text
    • https://wesamirovajep.weebly.com/uploads/1/3/5/3/135383051/ba8106.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wifobujaxude.epizy.com/77217890149.pdfIn PDF document text
    • http://tijepexaran.epizy.com/raduzibawizegedafekijedo.pdfIn PDF document text
    • https://s3.amazonaws.com/fotojipifuzitul/muvoromekitokeferilesi.pdfIn PDF document text
    • http://tupikodufalapa.epizy.com/80458416127.pdfIn PDF document text
    • https://54d25d35-1219-4e5f-97c3-905e72ea606f.filesusr.com/ugd/6d59ab_3dcb1b371dc949b7a5864f5a456c406c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/toguvaju/48596974404.pdfIn PDF document text
    • https://5902ff30-e651-486c-ac37-3e8383bfa78f.filesusr.com/ugd/f35da0_09b2f35b4f7446849050f46ad7910ab3.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/posaxugidut/the_entertainer_sheet_music_original.pdfIn PDF document text
    • https://02ee9779-94d6-4ec7-959f-c0f99fe19a35.filesusr.com/ugd/cdc607_b5d0ef99e7a54a188d36f9425927498d.pdf?index=trueIn PDF document text
    • http://guvedizimokid.rf.gd/39729662064.pdfIn PDF document text
    • https://s3.amazonaws.com/tokudapele/bissell_proheat_turbo_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/wusone/54422485911.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_off000104ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104AE 5524 bytes
SHA-256: 3b701d00d448cef3a396518f3262f8a4bbb3edb0dc839990d3d3afd85cd3256a
font_01_sfnt_off0001176e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1176E 10740 bytes
SHA-256: 70269a688bc5198223366cfda60f173974c4935cd8b497203c963b9f97179f80