Malicious PDF — malware analysis report

Static analysis result for SHA-256 11c3f2c4549f5f84…

MALICIOUS

PDF

301.1 KB Created: 2021-03-20 19:01:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 401b5d33933d2f8c58714f556e0f4a9b SHA-1: 7c7d3fd9309b5046f9537049a096004c24c7d24f SHA-256: 11c3f2c4549f5f84c5c7d1dfa77a3a57c231ef7423cb2c0cdc43b9e9bcdaf365
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to 'jacksth.ru', which is likely part of a phishing or malware distribution campaign. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to redirect the user to a malicious site, aligning with spearphishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9794

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://jacksth.ru/strik?utm_term=bible+commentary+matthew+7+24+27 PDF link annotation
    • https://ganegekisawaji.weebly.com/uploads/1/3/1/4/131406809/natutovab.pdfIn PDF document text
    • https://cdn.sqhk.co/noxomosanena/egdjbii/toca_kitchen_2_download_pc_free.pdfIn PDF document text
    • http://golulim.iblogger.org/xudutusowevemomikemus.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471474/normal_5fda9687f158c.pdfIn PDF document text
    • http://jawomubinuj.iblogger.org/basal_metabolic_rate_definition.pdfIn PDF document text
    • http://narewenu.22web.org/89857706278.pdfIn PDF document text
    • https://cdn.sqhk.co/kinanekoxo/Ggf2icl/kito_chat_with_fun_free_group_chats.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409806/normal_603202091c7a3.pdfIn PDF document text
    • https://cdn.sqhk.co/rowubuvuke/IhbIid3/hatsune_miku_tap_wonder_guide.pdfIn PDF document text
    • http://tonevagewalilu.medianewsonline.com/nsfas_application_form_2020.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386848/normal_5fd039ea9ed9a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482858/normal_6016d2ef981b9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447630/normal_5ff2a416eef12.pdfIn PDF document text
    • https://kofulunaj.weebly.com/uploads/1/3/5/3/135320514/0fcc14fef8a5f.pdfIn PDF document text
    • https://misurenagikokiz.weebly.com/uploads/1/3/5/3/135332419/numulofo-mamirekorigipim-fekesuk-roxoro.pdfIn PDF document text
    • https://serivuzoforin.weebly.com/uploads/1/3/4/3/134334639/b325ea7b557.pdfIn PDF document text
    • https://cdn.sqhk.co/zubavagi/50E4h36/what_is_the_christianity_symbol_called.pdfIn PDF document text
    • http://faxusupovetek.sportsontheweb.net/sudoj.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vawoxifi.epizy.com/blessed_be_your_name_sheet.pdfIn PDF document text
    • http://sanoziwubol.rf.gd/dagajadiwifu.pdfIn PDF document text
    • http://tuzikido.epizy.com/workbook_sample.pdfIn PDF document text
    • http://butorinowu.myartsonline.com/russell_index_calculator.pdfIn PDF document text
    • http://sakigekoxigukil.epizy.com/62597427308.pdfIn PDF document text
    • http://xamixamis.rf.gd/adobe_flash_player_2021_chrome_download.pdfIn PDF document text
    • http://runuwug.myartsonline.com/jesus_mi_fiel_amigo_jesus_adrian_romero_lyrics.pdfIn PDF document text
    • http://koxosam.rf.gd/a5_booklet_template_psd.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_off00046a0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x46A0C 5544 bytes
SHA-256: 0b66d20a6db5dac7c90669d34dc3dd7f690d99feee3de81636564d694bf26e81
font_01_sfnt_off00047ce0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x47CE0 11500 bytes
SHA-256: 317c743b30836d0259aecaf1cc3dfff69f9f23c5d02acdf985943687fe322d94

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