Malicious PDF — malware analysis report

Static analysis result for SHA-256 15cf383ca245ff16…

MALICIOUS

PDF

161.2 KB Created: 2021-03-28 22:18:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0b04efb41086964645d0119c7e7fc4af SHA-1: d478f28d15fb468b31a80444b24860b7b31cd430 SHA-256: 15cf383ca245ff1603820d06e70b27412bf2c31a3e50eec7bf6f6c1ad64bef20
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, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, which is a common tactic for phishing campaigns. The document body, though heavily obfuscated, suggests a lure related to educational materials, further supporting a phishing or malware distribution intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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/award?keyword=materi+agama+islam+kelas+xi+semester+2+pdf
    • http://tufuwavaziga.mygamesonline.org/what_is_the_average_salary_of_a_manufacturing_engineer.pdf
    • http://dilawiputonu.mypressonline.com/problems_of_agriculture_sector_in_pakistan_and_their_solutions.pdf
    • https://pibowalemarume.weebly.com/uploads/1/3/1/1/131164440/7498320deb1.pdf
    • https://sijokazodile.weebly.com/uploads/1/3/1/4/131454207/8756129.pdf
    • https://cdn.sqhk.co/wimiwupo/jbEicrW/41141356703.pdf
    • http://ravigimojamel.mypressonline.com/what_is_a_motorola_surfboard_sb6121_specs.pdf
    • https://cdn.sqhk.co/jerizukop/hapfjeT/1978760543.pdf
    • https://vadutebo.weebly.com/uploads/1/3/4/8/134889136/nigamisefameleji.pdf
    • http://rolivazugatar.scienceontheweb.net/wumejovomaxeduwuxixi.pdf
    • https://cdn.sqhk.co/bujasugawo/jcBlghC/pirivirusuxiwozadimejob.pdf
    • http://zasufigonibat.getenjoyment.net/3d_from_sketchup.pdf
    • http://tigibisolefora.mygamesonline.org/4840520796.pdf
    • https://cdn.sqhk.co/nilulugaj/9iiErQc/video_player_download_free_for_pc.pdf
    • https://cdn.sqhk.co/rinilafexowi/aDjgxii/14761745527.pdf
    • https://cdn.sqhk.co/wepigosogo/g86jfQa/amazon_nail_art_dotting_tools.pdf
    • https://wilivaja.weebly.com/uploads/1/3/2/6/132682565/a3808a7b5b.pdf
    • https://cdn.sqhk.co/bikegola/j4SJocW/12381196309.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://zegetafirotazaz.atwebpages.com/baramati_taluka_map.pdf
    • http://dakafatuvuguviz.atwebpages.com/phonics_test_for_grade_2.pdf
    • https://s3.amazonaws.com/luborinizu/writing_task_2_sample_answer.pdf
    • https://s3.amazonaws.com/potofaw/70304213488.pdf
    • https://s3.amazonaws.com/wupixufekijax/que_es_un_titulo_de_credito_al_portador.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://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License
    • http://www.gnu.org/copyleft/gpl.html
    • http://scripts.sil.org/OFL

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_008_off000242bb.bin
ed5d8b64edaaf33306165efd39b49a342bc66568a26534fc87a0df6eaaf9fa2e		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x242BB 27056 bytes
font_00_sfnt_off0001fb46.bin
f9a9e4710170d6d2ce92d1a5bf9f7f3279483f675d4bbc4d3d68473e6b6a6b54		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1FB46 1636 bytes
font_01_sfnt_off00020382.bin
bc2f805bd775327e2b7cd0971786fa7de3d04f6bd2b77c3fbe93352e7ed52a6a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x20382 5632 bytes
font_02_sfnt_off000216b3.bin
696c770d1b8f7a883e6b5ad6b0ef2edd50286204e51924e844b335fb67897050		 pdf-font-stream PDF embedded font (sfnt) at offset 0x216B3 13648 bytes

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