Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac4bc57e8d466dee…

MALICIOUS

PDF

81.1 KB Created: 2021-03-23 15:39:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d3541bda681fbf2d34d32fdca9f9682f SHA-1: d8376d8e7d390be943723c5bd423761b309992eb SHA-256: ac4bc57e8d466deef10607f8e3d655254e8fd517a94cd59cbef5284c3386f489
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that directs users to a suspicious domain, likely for phishing purposes. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though partially corrupted, suggests a lure related to 'Mht cet law 2019 form', which is likely a pretext to drive users to the malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://jumiwimov.ru/123?utm_term=mht+cet+law+2019+form
    • https://winugemu.weebly.com/uploads/1/3/1/0/131070294/kivasidajebev_zenutedisafuw_janesaxaliteg_jopalege.pdf
    • http://dkblogin-de.best/78878765920th4o7.pdf
    • http://mpvideo.org/advertising_industry_in_malaysiadxefz.pdf
    • https://kabenodetaxixum.weebly.com/uploads/1/3/4/7/134754863/vowerep.pdf
    • https://xuvifadeto.weebly.com/uploads/1/3/2/6/132682806/4115479.pdf
    • http://denazofumoxebo.iblogger.org/32537208353.pdf
    • http://kushtanash.ru/clases_de_comunicacion_en_una_empresa0ll60.pdf
    • http://p-kavkaza.ru/gorovoliwizuwpdnlc.pdf
    • http://5coupons.info/lasko_space_heater_walmart267hr.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://sowubiri.epizy.com/redovadidinoxatelewila.pdf
    • http://likijanima.epizy.com/12654856220.pdf
    • https://51bf459c-6b46-41b0-863f-532cf8a77e0d.filesusr.com/ugd/2eedf1_c7793d77ce284b8491ff5e066ba581b6.pdf?index=true
    • https://786c536d-253b-4a15-94df-129c4693a223.filesusr.com/ugd/1fc311_b51cf99bf2a449338b6b7492e4c51549.pdf?index=true
    • https://uploads.strikinglycdn.com/files/35e310f4-266f-48df-af85-45fed9c6789c/us_history_shorts_a_growing_nation.pdf
    • https://s3.amazonaws.com/zikeko/nuzopipokorinopofevijopup.pdf
    • https://uploads.strikinglycdn.com/files/7e578ac4-9dd9-4e45-88c1-30f8ad0538d0/is_hbo_max_on_amazon_fire_stick.pdf
    • https://s3.amazonaws.com/sulasatevirexo/hd_1080p_video_bollywood_songs_free.pdf
    • http://tebaxisabajix.rf.gd/ryobi_router_template_guide_bushing_kit.pdf
    • https://s3.amazonaws.com/setaxilitozuko/movie_counter_archives.pdf
    • https://s3.amazonaws.com/vonutavekip/allen_bradley_powerflex_40_manuale_italiano.pdf
    • https://uploads.strikinglycdn.com/files/d98325ef-3b09-40d8-9f7c-68c85ebe5fdc/cool_aa_meeting_topics.pdf
    • https://s3.amazonaws.com/jixerubowi/929726113.pdf
    • https://26c1613e-5d28-4fa3-89cb-3d2c9ab59faf.filesusr.com/ugd/fe83c3_f822febfce4f4a818079441283d07888.pdf?index=true
    • https://aa514bbb-a96e-4bc9-8ff3-0ca2edd1104f.filesusr.com/ugd/3fc21f_990cd6e459794407a06b1f0e973ecc41.pdf?index=true
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f285.bin
8026628f80d2e602e0f6d736cbdd560a70c19273809aeef7df4e9d2d26a416e2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF285 5156 bytes
font_01_sfnt_off00010424.bin
f6d6c501c6831a6f740ba21d22967dcc1e482f832d77714dc31fdc0b87a0ca06		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10424 10836 bytes
font_02_sfnt_off000128e0.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0x128E0 4324 bytes

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