Malicious PDF — malware analysis report

Static analysis result for SHA-256 504ea1c1bd55a0ae…

MALICIOUS

PDF

79.3 KB Created: 2021-01-23 05:56:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 90428ff87d3978ea4d20b2e30bdac347 SHA-1: b77cf8d27746f0d47b01cee1a2f8513e9c25c3d2 SHA-256: 504ea1c1bd55a0aefa6ccfa58d1831ca3428f350ba39da245bdd475e2c8f04d8
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with a specific detection name indicating phishing and trojan characteristics. An embedded URI points to a URL that, while appearing to be a software tutorial, is likely a lure for phishing or malware download. No scripts were extracted, but the PDF structure and embedded URI suggest an attempt to direct the user to a malicious resource.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://leonvi.ru/123?utm_term=dreamweaver+cs6+tutorial+ppt PDF link annotation
    • https://cdn.sqhk.co/kagaxavog/hejajgi/19356428790.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426679/normal_5fe38c181a59e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365580/normal_600b71c0e1bca.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413345/normal_5fcf852b4564f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407084/normal_5fc734a35a876.pdfIn PDF document text
    • https://cdn.sqhk.co/gizivapejoko/ig8hfjh/xoben.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403259/normal_5ff302a977926.pdfIn PDF document text
    • https://cdn.sqhk.co/pafevola/iQ3hihe/96634379432.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374178/normal_5fd101c7bfa46.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386081/normal_5fd63dd960450.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451028/normal_5ffbd4727ceda.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489615/normal_5fcd820de8765.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4457839/normal_5fe154f4ce958.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4467926/normal_6003de64b9924.pdfIn PDF document text
    • https://cdn.sqhk.co/gujuvizaja/iqgWKGh/music_sticker_png.pdfIn PDF document text
    • https://cdn.sqhk.co/gurudulep/cHPgcgi/lipimudusenanodifipep.pdfIn PDF document text
    • https://cdn.sqhk.co/kixobaza/ejjhhjf/mobile_barcode_scanner_app_android_free_download.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • https://s3.amazonaws.com/bufipevuril/sapezusiju.pdfIn PDF document text
    • https://s3.amazonaws.com/pirosisob/macroscopic_form_of_energy.pdfIn PDF document text
    • https://s3.amazonaws.com/zafirawit/xagonavogeruresanubuvazi.pdfIn PDF document text
    • https://s3.amazonaws.com/pazatuv/xolozesenuragojisoroluz.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
    • http://www.gnu.org/licenses/gpl.htmlIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e9d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9D9 5384 bytes
SHA-256: 4b25b476086695b92b42a28b9ea1c623871f60fbd834d7d4a3facf9aa9124809
font_01_sfnt_off0000fc22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC22 6068 bytes
SHA-256: cb159cc9d714520fdf604515834a8e5d6ccdf81551317d8133b939af7313f940
font_02_sfnt_off00010bd2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BD2 10528 bytes
SHA-256: d292d52b5a04f228780d98f6be0e4e0b8e3aadaf197a6620df2e18d9ef9aeaba

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