Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd4473365726c132…

MALICIOUS

PDF

67.9 KB Created: 2021-03-07 22:09:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2a961904ceffb16bd075b600be346642 SHA-1: 2e5a6a09152ca0451f875b578e7d6e5d2f315ad6 SHA-256: fd4473365726c132e9a9880c92359ff2aeca15f8438abad7c2ed478e57b761f7
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. It contains embedded URLs that point to suspicious domains, suggesting a phishing or malware distribution attempt. The document body, though heavily obfuscated, contains text related to a book title and author, likely part of a lure to entice users to click on the malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://midufefew.ru/wix?keyword=keesha+anderson+book
    • https://cdn-cms.f-static.net/uploads/4404529/normal_601ed7bebb1a2.pdf
    • http://women-ita.space/stairway_to_heaven_korean_drama_onlineehh9p.pdf
    • https://cdn-cms.f-static.net/uploads/4501204/normal_601b8fbe7f9f5.pdf
    • http://bokubewere.22web.org/16684254969.pdf
    • https://cdn-cms.f-static.net/uploads/4482413/normal_6016b76687ba9.pdf
    • http://lipejunotuxo.22web.org/google_maps_vietnam.pdf
    • https://static.s123-cdn-static.com/uploads/4387703/normal_5ff91037763cc.pdf
    • http://lnstagram-verificationbadgeform.com/35290864795m8m8e.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://bolutiso.epizy.com/nofirojitowibateletejoru.pdf
    • http://varoniwarovez.rf.gd/2193830415.pdf
    • https://354df738-7a8c-4643-bdcd-aa58f7c4bd0c.filesusr.com/ugd/69cf62_a1a66ff4205f4be2a49a06e27e6b1453.pdf?index=true
    • http://xidozuk.rf.gd/medicare_colonoscopy_guidelines_2019.pdf
    • https://8319d365-0190-44ee-b2f3-e76f6fd230eb.filesusr.com/ugd/112488_93d0eed334f340f4b3abe0d7681a19a7.pdf?index=true
    • https://8aefc570-8454-48c3-bb63-d4d1067b7ce0.filesusr.com/ugd/5c9621_8b54947cab2c4660aac6ddbc1c7cf9f8.pdf?index=true
    • http://zojuroveji.epizy.com/zafiwemijenofeg.pdf
    • http://tefotesibeto.epizy.com/is_driving_license_office_open_in_karachi.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ccef.bin
ebd7663c659a0554b983efbcfcafa37c8f1375f154f5a3d8aeeab8dea2f961f8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCCEF 5052 bytes
font_01_sfnt_off0000de10.bin
f432af607baf71eef4d41a4e728019dc50f80cd12f5254b7a3c4eb4ba96d64f7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDE10 10356 bytes

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