Malicious PDF — malware analysis report

Static analysis result for SHA-256 89e9ea2b45de667e…

MALICIOUS

PDF

82.5 KB Created: 2021-10-12 14:16:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: b1891ff07c6e6f1b21e436168de56f62 SHA-1: 2d4090b7c7bc4486088a1242fe7494b495b6f93a SHA-256: 89e9ea2b45de667e9dacf405c998bb8862fd3248307e8fe499174f66d0e8b73d
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, with one heuristic specifically identifying it as a link farm on disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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 http://law885995.com/upload/fckimages/file/kotakero.pdf In PDF document text
    • https://aviatroglo.fr/IMG/file/fofina.pdfIn PDF document text
    • http://for-rent-aalst.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614b8f94956c9---lozel.pdfIn PDF document text
    • http://casaatlantida.com/userfiles/file///94874837663.pdfIn PDF document text
    • https://gadesign52.com/uploads/files/202110050123068082.pdfIn PDF document text
    • https://samavetpharm.com/userfiles/files/kefizudole.pdfIn PDF document text
    • https://cambodiaangkorhomestay.com/userfiles/file/54160135286.pdfIn PDF document text
    • https://rewaqousha.net/userfiles/files/kusebagoxirelikutar.pdfIn PDF document text
    • http://nanumed.ro/uploads/files/vodak.pdfIn PDF document text
    • http://dlshixiang.com.cn/ckfinder/userfiles/files/paniki.pdfIn PDF document text
    • https://sssmri.com/ckfinder/userfiles/files/robiboxijisudivazadojeg.pdfIn PDF document text
    • http://generoussecurity.com/uploads/susizebefalakutoj.pdfIn PDF document text
    • https://heureka-cz.eu/files/50140308992.pdfIn PDF document text
    • https://gertiesbloomers.com/kousumi/nulook/upload/fckimages/file/kogemexabejerejitaji.pdfIn PDF document text
    • http://vegasoft.hr/wp-content/plugins/formcraft/file-upload/server/content/files/161514d71b440b---99126499327.pdfIn PDF document text
    • http://telekommarketing.com/firme_data/files/77816696366.pdfIn PDF document text
    • http://ourgans.org/userfiles/files/85076274427.pdfIn PDF document text
    • https://gangnampools.com/contents/files/95856727155.pdfIn PDF document text
    • http://abwfinlay.com/uploads/files/nekamovetodisu.pdfIn PDF document text
    • http://mycoapaisyl.com/webimages/files/68500454371.pdfIn PDF document text
    • http://1544-7419.net/upload/fckeditor/file/vusidufasonarojuguzupix.pdfIn PDF document text
    • http://mastrodibaglio.it/userfiles/files/gadubisutokizinol.pdfIn PDF document text
    • https://hanoihome.net/img_duhoc/files/1454257300.pdfIn PDF document text
    • http://feedproxy.google.com/~r/MbOu/~3/BGAemAmcdTc/uplcv?utm_term=the+concept+of+marketing+mix+was+developed+byPDF 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_off0000d650.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD650 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ee67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE67 11628 bytes
SHA-256: d04a4e8a1e1c959eabddaed90df523bab8af758d67e4d577cb13ca506892562a
font_02_sfnt_off00010980.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10980 19364 bytes
SHA-256: dfe8d0a7e68d3fb3a5926c8cc51743664a435555487843b62b29a5a4e230a667

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