Malicious PDF — malware analysis report

Static analysis result for SHA-256 13e30fee3ac5b89b…

MALICIOUS

PDF

85.9 KB Created: 2021-02-27 03:15:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 8650631fdf11d12d3abb8663de24e81f SHA-1: 2a3ad89dad227e41bdc70e4c6a2aefc9a9382055 SHA-256: 13e30fee3ac5b89b08e39290a603ce4360ae27f92e9029207e4bd3f61045b1cd
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://vilenefex.ru/123?utm_term=wilderness+first+aid+class+nh PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4369164/normal_5ff11df8a4392.pdfIn PDF document text
    • https://kifeketefisub.weebly.com/uploads/1/3/5/3/135347095/papej-zizes-biwidob.pdfIn PDF document text
    • http://livecopyrightverification.com/wild_frontier_game_review0z3t9.pdfIn PDF document text
    • http://tihefers.online/bella_-_pro_series_belgian_flip_waffle_maker_-_stainless_steel_reviewstg9ub.pdfIn PDF document text
    • https://zetitazafoxiz.weebly.com/uploads/1/3/4/0/134040412/xeturazinuke.pdfIn PDF document text
    • http://volazanuva.22web.org/aldington_primary_school_ofsted_report.pdfIn PDF document text
    • https://vimosetadasosus.weebly.com/uploads/1/3/2/7/132740377/3c91d.pdfIn PDF document text
    • http://xsafak.com/84864733768dh6wz.pdfIn PDF document text
    • https://kererivodukeje.weebly.com/uploads/1/3/5/3/135303009/6858976.pdfIn PDF document text
    • http://reduslimitaly-ufficiale.site/free_video_editor_for_youtube_channellaz40.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427514/normal_60327ed577c11.pdfIn PDF document text
    • https://nosujufan.weebly.com/uploads/1/3/1/0/131070407/zekojubabakakowu.pdfIn PDF document text
    • http://desajegurake.scienceontheweb.net/xujisolise.pdfIn PDF document text
    • http://www.opentle.orgIn 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
    • http://marivugedada.epizy.com/fatokifuxivirikovujig.pdfIn PDF document text
    • http://govuwetubor.epizy.com/18181739021.pdfIn PDF document text
    • http://dipumekamerara.rf.gd/howard_gardner_multiple_intelligence_test_free.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://www.gnu.org/licenses/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0000f2a8.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xF2A8 13628 bytes
SHA-256: 6089b750b05e8dde1dd30ab18dd69e090ca0ff39997d68add63c81b70ac0d1cc
font_00_sfnt_off0000e275.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE275 4800 bytes
SHA-256: 3e44e8e8cda6e98329cca57c05cebb4e636ed3221e0054f661a39904f6921c35
font_02_sfnt_off0001182e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1182E 10024 bytes
SHA-256: 98cf7b8dada81355b2db941ff3194771728119cd0c6f53444e5d17bc8a84fe02
font_03_sfnt_off00013a8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A8C 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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