Malicious PDF — malware analysis report

Static analysis result for SHA-256 e10fbe4002aa1f9d…

MALICIOUS

PDF

73.2 KB Created: 2021-06-02 12:57:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1f8f7c6af3cd0bcf14584219ac9c5ff1 SHA-1: 2809d5a9b6c8eca48652b89473de7529f8325614 SHA-256: e10fbe4002aa1f9de4d5239fe54ba77cc77cfa9f930ed776d38a27c7f2d76a3b
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The embedded URL, 'https://huntic.ru/pbw?utm_term=bts+world+hack+apk+ios', suggests a phishing or social engineering lure, likely related to downloading applications. Although no scripts were explicitly extracted, the PDF structure and embedded URI heuristic point towards an attempt to redirect 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://huntic.ru/pbw?utm_term=bts+world+hack+apk+ios
    • https://static.s123-cdn-static.com/uploads/4378856/normal_5fcc5a4030b4b.pdf
    • https://static.s123-cdn-static.com/uploads/4386849/normal_5fddc163566c4.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/3a7b4d64-42e1-413d-afc6-4c027793d5bb/cuanto_es_1_8_pulgadas_en_centimetros.pdf
    • https://uploads.strikinglycdn.com/files/398e720b-24df-4b34-8918-50fe144f3600/45508673780.pdf
    • http://nugurafuge.pbworks.com/f/faceapp_pro_apk_ios.pdf
    • http://pefagisunel.pbworks.com/f/24619308374.pdf
    • https://uploads.strikinglycdn.com/files/2f78f459-4e01-4d0c-be1b-295a43d0d6c8/seradezuvazizowuluxiw.pdf
    • http://kiletejude.pbworks.com/w/file/fetch/144427479/deivangal_ellam_thotre_pogum_mp3_song.pdf
    • https://uploads.strikinglycdn.com/files/4e892e0a-aadf-4fbc-8293-1badabd1268e/what_is_unlockit.co.nz.pdf
    • https://uploads.strikinglycdn.com/files/413fa63b-1e85-4d15-a819-f558193d9ac4/warhammer_40k_9th_edition_space_marine_codex.pdf
    • http://veniwusuj.pbworks.com/w/file/fetch/144502494/bhagavad_gita_english_slokas.pdf
    • https://uploads.strikinglycdn.com/files/2231c006-612d-4d63-8a34-e0eb4b0813ff/29749238243.pdf
    • https://uploads.strikinglycdn.com/files/89b1845e-a083-4b43-bc8e-fac95d7fef8c/dogewomogazodiro.pdf
    • https://uploads.strikinglycdn.com/files/d4c7f134-49b9-495c-bedc-86617729a693/dremel_3000_vs_4000_diferencias.pdf
    • http://fepewuwakow.pbworks.com/w/file/fetch/144501705/wolf_online_super_mod_apk_download.pdf
    • http://nusuwoxub.pbworks.com/w/file/fetch/144422454/zarobirijebogojepomejedid.pdf
    • https://uploads.strikinglycdn.com/files/352d009d-986a-41b5-bbed-a19f70b4147b/26580811385.pdf
    • http://tosuvop.pbworks.com/w/file/fetch/144475809/76541768985.pdf
    • http://degenazi.pbworks.com/f/how_to_hide_speaker_notes_in_google_slides.pdf
    • https://uploads.strikinglycdn.com/files/9249f21d-fdb6-4c81-82f9-6a96a1dcc58e/how_to_program_ge_light_switch_timer.pdf
    • https://uploads.strikinglycdn.com/files/b6de00d7-01ab-4fa4-959a-08d719517fca/how_do_i_charge_my_anker_powercore_10000.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_off0000e070.bin
86ebc0bd7ee16e1564ea2f646e1b725a7b9644a8f03ed59e1ea7778bb296051e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE070 5368 bytes
font_01_sfnt_off0000f2b7.bin
e7a7f0337685f9af9c4278b6e8f87d0ca447413139e4c952ad00c9f2c097d953		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF2B7 10784 bytes

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