Malicious PDF — malware analysis report

Static analysis result for SHA-256 2cd32e5d8c72283b…

MALICIOUS

PDF

84.6 KB Created: 2021-09-12 11:31:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: f509291ef8605feb3125b5781a9a2122 SHA-1: dc78f211114d3dc6e9e5cbaa11fb956e89500317 SHA-256: 2cd32e5d8c72283bb68c203d92ecbe1ba115635b5a3f9a3ed01df5db2eee7a1c
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, with many pointing to unknown or potentially malicious domains, and is flagged as a link farm. ClamAV detection and ML classification strongly indicate malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malicious document delivery mechanisms.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://mrdak.cc/uploadfile/files/20260992144.pdf In PDF document text
    • https://www.tonygssoulfood.com/wp-content/plugins/super-forms/uploads/php/files/af19a40af6553acf900a36c1eb71cc11/jetagavepa.pdfIn PDF document text
    • http://phyllisrubensteinlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/nulobij.pdfIn PDF document text
    • https://aspirecambodia-edu.org/userfiles/file/gotufilogefajonoguj.pdfIn PDF document text
    • http://novichiha.ru/pic/file/fefes.pdfIn PDF document text
    • http://snft.ro/media/file/zewibilaban.pdfIn PDF document text
    • http://igabana.com/upfolder/e/files/20210907172358.pdfIn PDF document text
    • http://www.oe.com.tw/ezadmin/ckfinder/userfiles/files/22824856083.pdfIn PDF document text
    • http://studioturina.com/userfiles/files/vutuj.pdfIn PDF document text
    • http://liqaa-lb.com/files/userfiles/files/75540230114.pdfIn PDF document text
    • http://romento.com/uploaded_files/userfiles/files/53814258555.pdfIn PDF document text
    • https://korankertas.com/contents/files/wavoferanusinugonega.pdfIn PDF document text
    • https://108pizza.pl/uploads/userfiles/files/wiliwagorome.pdfIn PDF document text
    • http://industrialsupplies.pk/userfiles/files/gujugagep.pdfIn PDF document text
    • https://xtremefitksa.com/ckfinder/userfiles/files/nudakanibisivosi.pdfIn PDF document text
    • http://intranet.uts.edu.co/portal/app/ckfinder/userfiles/files/48321742942.pdfIn PDF document text
    • https://marwaservicecenter.com/nbloom/fckuploads/file/30643036694.pdfIn PDF document text
    • http://duda-tech.pl/dudatech/upload/file/turijalevewafipepewurib.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/161336720a6c69---xelopazibom.pdfIn PDF document text
    • http://hvezda-pardubice.cz/files/file/192712358.pdfIn PDF document text
    • http://rentaruedas.com/files/others/33148300105.pdfIn PDF document text
    • https://namphuctourist.com/userfiles/file/55264568976.pdfIn PDF document text
    • http://www.europesolidaire.eu/userfiles/files/98281366641.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=java+design+pattern+essentialsPDF 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_off0000e477.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE477 18944 bytes
SHA-256: fc4748610162faab2a0a3c28d14ef8e521f2243ee238dd24502014743033e932
font_01_sfnt_off00011511.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11511 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012d28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D28 10504 bytes
SHA-256: 48a5afb72de351daa78f3f7d5a036791c0e657fdbe091d2aa367d06e27e829dd

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