Malicious PDF — malware analysis report

Static analysis result for SHA-256 92273ef1d5ef406b…

MALICIOUS

PDF

285.9 KB Created: 2021-03-15 07:31:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 95a93da6617f2ecbcde6c159a86ab855 SHA-1: f3794a472c478b3bec95bcb9eac4df04b550b6f6 SHA-256: 92273ef1d5ef406bf02995b7a1cf3542aa258b9aee951d5c8269cadf452bb226
104 Risk Score

Malware Insights

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

The file is identified as malicious by a ML classifier and ClamAV, indicating it's a phishing or trojan PDF. The presence of embedded URLs, including one pointing to 'zajinet.ru', suggests an attempt to redirect users to malicious content. Although no scripts were explicitly extracted, the PDF structure and heuristic firings point towards a malicious document designed to trick users into downloading further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://zajinet.ru/award?keyword=automatismos+electricos+e+industriales+jose+luis+duran+pdf PDF link annotation
    • http://sandiego-podcasts.com/6271257452pzsmn.pdfIn PDF document text
    • https://golinogejus.weebly.com/uploads/1/3/1/6/131606227/9c545227e3.pdfIn PDF document text
    • http://instapriz24.online/75212728613my0ld.pdfIn PDF document text
    • http://iuts.space/48251890652fz1o2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419193/normal_6034041c68adf.pdfIn PDF document text
    • https://bokasopuvozanib.weebly.com/uploads/1/3/4/3/134319525/3920aa6e8c6.pdfIn PDF document text
    • https://cdn.sqhk.co/gevagedubop/jfI9apD/viwunujavimapitutiwa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384143/normal_6013a32d00318.pdfIn PDF document text
    • http://tapavinologo.mygamesonline.org/mubotamelipejamopeba.pdfIn PDF document text
    • https://boziwukajolefix.weebly.com/uploads/1/3/2/7/132711983/binufokugeni_manadogazaliwe_kupofa_lutenudifikosol.pdfIn PDF document text
    • http://vipimuxatomefi.medianewsonline.com/zidudobabuwagitoremijo.pdfIn PDF document text
    • http://luminar4-download.xyz/rinozepepumizivegasodepsn4e.pdfIn PDF document text
    • https://jabiwogox.weebly.com/uploads/1/3/1/4/131453485/6344922.pdfIn PDF document text
    • http://vetobiz.sportsontheweb.net/salaverugapomasijexi.pdfIn PDF document text
    • https://cdn.sqhk.co/xogudililavo/hfgiYIl/basowinevexaguxurawafoli.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388405/normal_5fe225e5bdf94.pdfIn PDF document text
    • https://jisasulozif.weebly.com/uploads/1/3/4/3/134371627/1792445.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://ff06b2c9-6223-4357-b4d5-1bf3807c749f.filesusr.com/ugd/717131_cc7bac124e9e412190794e0dd4a5f661.pdf?index=trueIn PDF document text
    • https://6bb2b61b-82bf-473b-8365-63ddb02ddbdd.filesusr.com/ugd/d55797_394d972b59a849f784d11666ba4cee90.pdf?index=trueIn PDF document text
    • https://a7da3e60-63c8-46c1-a846-eab7df628ed2.filesusr.com/ugd/bba345_1869f7a7c01d49c5a14be5dd535bf539.pdf?index=trueIn PDF document text
    • http://wejufutaz.onlinewebshop.net/how_do_i_factory_reset_my_portal.pdfIn PDF document text
    • http://pidodexogejax.myartsonline.com/hitachi_65_tv_reviews.pdfIn 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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00042303.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x42303 5368 bytes
SHA-256: 846294c1da484596e7dd1ee0080e7f9b1f8d4424b61582b85e686dcba97949e9
font_01_sfnt_off00043531.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x43531 15080 bytes
SHA-256: d032b6d32b4f6e5345327455fe52092f2b154258deda7d8177deee59ae939e07

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