Malicious PDF — malware analysis report

Static analysis result for SHA-256 f783a931ecfbf92c…

MALICIOUS

PDF

102.5 KB Created: 2021-05-12 17:46:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7e2a6ab5397cbbf87ce5835322e695a8 SHA-1: 579d5e8b3a406c4c83ffe0b13090becf336beb98 SHA-256: f783a931ecfbf92c0f4ac56569c6b50f913b78a3df0cbfc783c5aa7f09d16ae8
96 Risk Score

Malware Insights

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

The PDF document contains an embedded URI that directs the user to a suspicious URL, likely for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though partially corrupted, suggests a lure related to grammar, which is a common tactic for phishing or social engineering.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://jacksth.ru/strik?utm_term=what+does+the+suffix+ly+mean
    • http://arboozfilm.com/caracteristicas_de_un_estudio_de_casos_y_controlesmr59w.pdf
    • http://rawenspant.online/87283869690461va.pdf
    • http://erogan-oficial.site/braun_series_9_shaver_head_replacementblm04.pdf
    • http://lovelyhouse.online/87094416562o3him.pdf
    • http://passive-income.ru/mackie_1604_vlz3_manual_espaolu2y47.pdf
    • https://cdn.sqhk.co/lojibuwe/ZibcJ2o/subaxewizafineboravuj.pdf
    • http://pagebake.com/35925299576ehko7.pdf
    • http://dezlice.ru/adding_integers_free_worksheetsfe9za.pdf
    • https://cdn.sqhk.co/nopawuwam/Q9gjcid/baribudokuvibakod.pdf
    • http://xtina.online/how_to_get_blooper_links_awakening171yl.pdf
    • https://cdn.sqhk.co/letarezetap/qCFbfIF/free_funeral_program_brochure_psd_template.pdf
    • http://serdyukov.pro/45413835792r4n9h.pdf
    • https://cdn.sqhk.co/vuxesojogugu/hajfghj/36854223208.pdf
    • https://cdn.sqhk.co/wodelaganav/dihmPji/33658780532.pdf
    • http://whitecheat.xyz/amazon_wordpress_hosting_pricingxyhw9.pdf
    • http://pressit.space/how_to_reset_service_light_on_mini_cooper_s_2009ynoaa.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://doriponesarom.myartsonline.com/pofozotelovipez.pdf
    • http://nibopinalilabaj.onlinewebshop.net/72926747708.pdf
    • https://uploads.strikinglycdn.com/files/4ae222be-492f-4147-8f59-c6b890ad61b7/75160258843.pdf
    • https://uploads.strikinglycdn.com/files/e106c4d5-c789-42e2-8586-6481a557cc3c/narez.pdf
    • https://uploads.strikinglycdn.com/files/8c02ed6b-149e-4817-b97f-20a453cd138f/saxon_math_kindergarten_worksheets.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_off00014ba7.bin
0232d48d74e24feee817a784b91480daef42a1d1977a3778bca22bbee7a7a3c0
pdf-font-stream PDF embedded font (sfnt) at offset 0x14BA7 5232 bytes
font_01_sfnt_off00015d6d.bin
11cccc1227c6b4d6920c82e8ee1b05ca57e779aad771d1740e085594c762dc8c
pdf-font-stream PDF embedded font (sfnt) at offset 0x15D6D 15168 bytes