Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea69373edd5dd6b7…

MALICIOUS

PDF

79.6 KB Created: 2021-09-13 06:33:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: eb9f7af8e8b3e23507cfd358a9768108 SHA-1: 9942eaf2e3c440754bc385ad9825fd0dc03268cd SHA-256: ea69373edd5dd6b7c52fce179eedd853c7cffc4a972be4ec7cade6ff73b838e7
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. While no scripts were explicitly extracted, the PDF structure and URL distribution suggest it's part of a phishing or malware distribution campaign, likely initiated via spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://tznjl.com/userfiles/files/puwafonebexofapoxex.pdf In PDF document text
    • http://bladensburg.abwingsmd.com/uploads/files/zevibemukot.pdfIn PDF document text
    • https://perfecthospitals.org/ckfinder/userfiles/files/71825601673.pdfIn PDF document text
    • http://ebd.su/UFD/7623/files/kiraxagarir.pdfIn PDF document text
    • http://freehajjandumrah.com/admin/admin/uploadfiles/file/96859747457.pdfIn PDF document text
    • http://metallpress.ru/files/xojivaloxapofejusaxeba.pdfIn PDF document text
    • https://vnmmalta.com/userfiles/file/82033373063.pdfIn PDF document text
    • http://holzbau-napetschnig.at/31893684688.pdfIn PDF document text
    • http://smirna.pl/files/file/9121622543.pdfIn PDF document text
    • http://www.oknookna.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1613e860818df3---84268403111.pdfIn PDF document text
    • http://anabakorea.jp/userfiles/file/jamepi.pdfIn PDF document text
    • https://dreamscapes.ca/dream_scapes/userfiles/files/ragefuroviwetave.pdfIn PDF document text
    • http://e-baze.lv/images/site/file/voditoretufaniwawakokola.pdfIn PDF document text
    • https://contemporaryteas.in/admin/uploads/file/kuwaziwibinugagufu.pdfIn PDF document text
    • https://atlastoursntravels.com/userfiles/file/tosud.pdfIn PDF document text
    • https://trichynext.com/wp-content/plugins/super-forms/uploads/php/files/5ccedb9092a03231b16eff1a4823fbc0/fuxaxower.pdfIn PDF document text
    • http://xn--80aamwn.xn--p1ai/userfiles/file/libelutexanawam.pdfIn PDF document text
    • https://wangwangcamp.com/uploads/files/202109062328032904.pdfIn PDF document text
    • http://lobi.md/userfiles/file/74941313193.pdfIn PDF document text
    • http://cpghollywood.com/userfiles/files/zivoketitupuwagitabaje.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=editing+video+on+android+phonePDF 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_off0000cffc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFFC 10504 bytes
SHA-256: b52e6e08569ec36cd6d032cbe98caf12d2ee8ed4eef697c2801b4d7213aef899
font_01_sfnt_off0000e792.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE792 18348 bytes
SHA-256: 0e88a119c3637c2b700ffe1b10618a305ac996b7eab987d8c9f33b5f7c7f2978
font_02_sfnt_off00011774.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11774 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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