Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a6cf0d89ff3e13d…

MALICIOUS

PDF

68.6 KB Created: 2021-09-09 01:21:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-23
MD5: 46ccd47f2ad20b6623b6f8c79832ac5d SHA-1: 95822dab7baa94ada6389fb493fb99bcf9e8ace0 SHA-256: 0a6cf0d89ff3e13d120b0dab46cecf0d71fcbefe1d6d082f2e9297f45436df9b
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 0.9965

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://culbertsonlawyer.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/vebabuvuxemu.pdf In PDF document text
    • http://engineersclasses4competition.com/files/others/28324014477.pdfIn PDF document text
    • http://villabrown.it/userfiles/files/19183257867.pdfIn PDF document text
    • http://adimhukuk.com/resimler/files/78624867756.pdfIn PDF document text
    • http://cheliabinsk.realxenon.ru/uploads/files/93611703507.pdfIn PDF document text
    • http://hichipper.com/hichipper/uploadfile/file/2021090508465873499.pdfIn PDF document text
    • https://mpressivelabels.com.au/application/third_party/ckfinder/userfiles/files/kupobajikevawenikabilaf.pdfIn PDF document text
    • https://fallahi-sch.com/userfiles/file/ditakupefodinazira.pdfIn PDF document text
    • http://methese.com/upload/files/70413948748.pdfIn PDF document text
    • https://www.gullyracing.it/admin/ckfinder/userfiles/files/82791086531.pdfIn PDF document text
    • http://sdds.be/userfiles/file/zefesuduxulujetitofupitex.pdfIn PDF document text
    • http://gainliving.com/upload/editor/file/pizixexezuxisigadakamiser.pdfIn PDF document text
    • http://zbraneklapka.cz/ckfinder/userfiles/files/54186654050.pdfIn PDF document text
    • http://m3hotels.com/userfiles/file/19622489082.pdfIn PDF document text
    • https://andana.us/files/files/xowaxebinuxosugoli.pdfIn PDF document text
    • http://perksys.com/userfiles/file/beribulopuxubudog.pdfIn PDF document text
    • http://newtarrytowndeli.com/uploads/files/42361201535.pdfIn PDF document text
    • https://ltes2.tw-goods.com/UserFiles/files/xebafuba.pdfIn PDF document text
    • http://sakem.org/userfiles/files/546168205.pdfIn PDF document text
    • http://chia4kids.ru/ckfinder/userfiles/files/dijulomaga.pdfIn PDF document text
    • https://arichaindia.com/userfiles/file/sexawukupudilowapojube.pdfIn PDF document text
    • http://unibox.lv/files/text/xurunagigibo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=gomovies+movies+malayalamPDF 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_off0000ae6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAE6D 15476 bytes
SHA-256: 7cf75028b22f86fa152252365e85e2c837883709b22bc1c218fd75184dbeddf6
font_01_sfnt_off0000d61a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD61A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000ee31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE31 10188 bytes
SHA-256: 34020391de4643f3d79b4d115b2c82d1301db85f506d35a02d59eeab473e09c1

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