Malicious PDF — malware analysis report

Static analysis result for SHA-256 0360ac4afbf039be…

MALICIOUS

PDF

86.8 KB Created: 2021-02-11 12:41:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 02791db6c9a8fc078c47070c2ae6af54 SHA-1: 95618bb2d91e87ac9e8934cbd762ed52347fa4e1 SHA-256: 0360ac4afbf039be42d635f91a7572f420a1715462cfe5a2623451c04ae2addb
96 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URL, identified by the PDF_URI heuristic. The ML classifier and ClamAV detection strongly indicate maliciousness. The document body, though heavily obfuscated, appears to be related to firmware, suggesting a lure to a malicious site for downloading potentially harmful files.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://maypoin.ru/wb?keyword=tp-%20link%20archer%20c50%20firmware PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4426697/normal_600cc5036117c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366961/normal_5fcc0083f405f.pdfIn PDF document text
    • http://4338bacchus.com/nanupetunubudimujowatwk1n.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482870/normal_5fca0bb6dcd6a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392660/normal_5fe76baf3c6b7.pdfIn PDF document text
    • http://cabinetshub.xyz/59973789171oysna.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446377/normal_601c609ba6fad.pdfIn PDF document text
    • http://ryukzak.digital/tedomefonunedupexijetat304m.pdfIn PDF document text
    • http://umniashka.ru/rolleiflex_2.8c_manual6idlm.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4467285/normal_6007111a7453a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495997/normal_600eae11c0341.pdfIn PDF document text
    • http://50offstore.pro/imaan_beimaan_film_songvwk4a.pdfIn PDF document text
    • http://zalavsky.ru/prison_payback_korean_drama23zfu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410702/normal_5fc9be199395b.pdfIn PDF document text
    • http://blockingscenery.com/2164723330254hgn.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374021/normal_5fcf41d57110c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4528915/normal_6003198972350.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470218/normal_5ffce33f9e5e2.pdfIn PDF document text
    • http://3gusevshop.space/35685138806mu9bx.pdfIn PDF document text
    • http://frasqen.online/gatejuzevexevo6jb43.pdfIn PDF document text
    • http://mivetys.xyz/formal_languages_and_automata_theory_lecture_notespmok1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473410/normal_600e8c7815576.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • 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://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f101.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF101 5076 bytes
SHA-256: 37b89da22eaab5a1798a43ee3c2a8a90dd13703ce33b1a9dc41f001e955ba7ba
font_01_sfnt_off0001021a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1021A 11948 bytes
SHA-256: b857fd74bc4edaca4ff63433deace2377e8b8dd25f8fe281e3489bcc9c6c00e9
font_02_sfnt_off00012a6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A6E 16132 bytes
SHA-256: 60f53b17f7925ac1818ac9336ea58fd206fea48872b5377b70e6fb8114080afd
font_03_sfnt_off00013f61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F61 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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