Malicious PDF — malware analysis report

Static analysis result for SHA-256 a5369ec428fba69b…

MALICIOUS

PDF

75.8 KB Created: 2021-03-11 01:47:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: 0da54305013a7286b37a11dd953f0e39 SHA-1: 3db15749de64b8e21c89470dc693ef704ec932e6 SHA-256: a5369ec428fba69b18c12bb73d736d4de1d248dc74158bc5da73dc10bbbf327f
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, indicative of a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and numerous URLs point towards an attempt to redirect users to malicious sites, likely as part of a broader phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://jumiwimov.ru/wix?keyword=metro+dog+pound+casper+wy PDF link annotation
    • https://cdn.sqhk.co/xaloridinef/j4mEjaC/personalized_nautical_life_ring.pdfIn PDF document text
    • http://jumpfs.space/291453583485rchi.pdfIn PDF document text
    • https://cdn.sqhk.co/pedidagow/LihC4jj/tumblr_portfolio_themes_2020.pdfIn PDF document text
    • http://watertea.space/notes_app_for_iphone_not_workings8g0w.pdfIn PDF document text
    • https://xaxarudo.weebly.com/uploads/1/3/0/7/130740130/duzodomexigukikel.pdfIn PDF document text
    • http://ecoterritory.store/asterix_y_obelix_descargarqqdkk.pdfIn PDF document text
    • http://torchqbfl.fun/44903822939fk56o.pdfIn PDF document text
    • https://pajobozonojamu.weebly.com/uploads/1/3/3/9/133997184/329663.pdfIn PDF document text
    • http://apparently-home.com/178339666595h89i.pdfIn PDF document text
    • http://instgramcopyrightdispute.com/sufawofenidurofopaccqh2.pdfIn PDF document text
    • http://kesuvajeb.scienceontheweb.net/nexotuxebakiratogatotij.pdfIn PDF document text
    • https://zinegekoxemajaj.weebly.com/uploads/1/3/4/7/134767253/pasunafez.pdfIn PDF document text
    • https://sedidumorasu.weebly.com/uploads/1/3/4/5/134507492/6569532.pdfIn PDF document text
    • http://likefetevu.getenjoyment.net/gudevefekiware.pdfIn PDF document text
    • https://cdn.sqhk.co/duwenaxiseve/lhjzhfu/25853716163.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://f37c3615-20b0-4e70-b1e7-2acf34113780.filesusr.com/ugd/1e533a_dc34aef9ce514caaa8d6e7ae3b21d0e8.pdf?index=trueIn PDF document text
    • https://1cf095b7-1d29-4152-b82c-7733cf7ba0c7.filesusr.com/ugd/c1de29_2631858830944e44937b00c48581217d.pdf?index=trueIn PDF document text
    • https://2ed821ec-8078-4e74-b11b-c5cec6a88262.filesusr.com/ugd/65e777_07ad646c29c8441090021dc41b8ec22e.pdf?index=trueIn PDF document text
    • https://dc6b22d1-fd3c-476a-b8f1-b0505981f591.filesusr.com/ugd/ab5adf_aaec3e2636ef49d0983aea320ea54fe0.pdf?index=trueIn PDF document text
    • http://nisetekotixob.myartsonline.com/jimele.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_off0000ed92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED92 5408 bytes
SHA-256: 9c95f813522ce1899a30934caec97d6c2112751aeaf1dd99a6ea679f39650fba
font_01_sfnt_off0001002a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1002A 9972 bytes
SHA-256: d59dc346f5b2411e738cfb49c806bbf04b7372730a3bbb96bc051b466fb8aa07

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