Malicious PDF — malware analysis report

Static analysis result for SHA-256 8964b06723c1ed82…

MALICIOUS

PDF

67.6 KB Created: 2021-09-12 01:57:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-04
MD5: 1db09bc88ad609640babaac0917111af SHA-1: e1a26348e0d22c405981da093e774a58628d6cac SHA-256: 8964b06723c1ed82afdac48f51172fd63df830489637bc99ff3480082ba18a10
126 Risk Score

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 0.9966

Heuristics 5

  • 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 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://www.renfrewareahealthvillage.ca/ckfinder/userfiles/files/68103547530.pdf In PDF document text
    • https://gbagencement.fr/uploads/file/vinewoturimegidum.pdfIn PDF document text
    • http://gbfrjournal.org/pds/userfiles/files/90936384732.pdfIn PDF document text
    • https://sanipro.ma/app/webroot/uploaderfiles/xawuxogizutelokixepokar.pdfIn PDF document text
    • https://myagenda.myagenda.cz/pictures/editor/files/gopokado.pdfIn PDF document text
    • http://digitalpolicycouncil.org/imagenes/file/pudubo.pdfIn PDF document text
    • https://viboot.traigiongthuha.com/ckfinder/userfiles/files/91526641385.pdfIn PDF document text
    • http://podwierzba.eu/ckfinder/userfiles/files/bizafuzaxavuwiziguk.pdfIn PDF document text
    • https://heatingboiler.ca/fck_upload/file/lefurodimumez.pdfIn PDF document text
    • http://p-itos.net/admin/userfile/image/file/9485488512.pdfIn PDF document text
    • http://sanalights.com/admin/admin/uploadfiles/file/xerumapekikot.pdfIn PDF document text
    • http://thucphamchucnangmy.vn/uploads/files/fememuzukukofajebusotubon.pdfIn PDF document text
    • http://luijkzonwering.nl/image/file/50121099845.pdfIn PDF document text
    • http://medob.org/SITE/files/editor/file/95647992350.pdfIn PDF document text
    • http://victorylimo1.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a66dbdfaea---fumagagitekamesusagoliv.pdfIn PDF document text
    • http://giadinhlaurenso.org/upload/files/sekunekakelavogo.pdfIn PDF document text
    • http://pnalog.ru/images/file/zojutel.pdfIn PDF document text
    • http://dalieuht.com/app/webroot/uploads/files/65782021833.pdfIn PDF document text
    • http://vektorma.ru/uploads/assets/file/niruwinavupegasemitatemo.pdfIn PDF document text
    • http://glavis.biz/userfiles/file/55896535098.pdfIn PDF document text
    • https://pikewallis.no/wp-content/plugins/formcraft/file-upload/server/content/files/1613c9185515b0---fenamizo.pdfIn PDF document text
    • http://ooexperience.be/assets/Image/files/45012883685.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=naplan+week+2021PDF link annotation
    • 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000adca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xADCA 10116 bytes
SHA-256: 7569a05cf53a47104fbb0822369ce8d192ac1ffa5b98a12cec606d8254ac5f4b
font_01_sfnt_off0000c4a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC4A1 14772 bytes
SHA-256: 304671c50560fdd8fc548214b2fa3fac4651a2ca38a7bce177505885f2a98fd5
font_02_sfnt_off0000e9a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9A8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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