Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae9d5308d0bdde11…

MALICIOUS

PDF

78.0 KB Created: 2021-04-30 08:46:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e57683a2a6abbabd3bd75ffc4d34b907 SHA-1: e745e1b5866da28f66820614a00888de0a41c0c5 SHA-256: ae9d5308d0bdde11ff436d645570193ec562341595679ce7fb911e86f0dfec8c
96 Risk Score

Malware Insights

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

The file is a PDF document identified as malicious by ClamAV and an ML classifier. It contains an embedded URI pointing to a suspicious domain, likely intended to trick the user into visiting a phishing or malware distribution site. The document body is heavily obfuscated, but the presence of the external URI suggests a phishing or social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://pelibifir.ru/strik?utm_term=primeiro+de+maio+%25C3%25A9+feriado
    • https://cdn.sqhk.co/nilofixogezu/egUjhjf/whatsapp_apk_for_nokia_asha_501.pdf
    • http://doxalasi.mywebcommunity.org/26622317447.pdf
    • http://zijozarub.mygamesonline.org/getting_ready_for_marriage_workbook.pdf
    • https://cdn.sqhk.co/gopuxipo/cggAjfg/fuworasalutitutofaw.pdf
    • http://watogoda.mypressonline.com/a_to_z_opposite_words_list_download.pdf
    • http://zovolexune.sportsontheweb.net/25899106434.pdf
    • http://rajudadude.mygamesonline.org/80222794695.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/1c143c9c-74dd-48e8-86e1-e3d4b4c73aa2/4049980441.pdf
    • https://uploads.strikinglycdn.com/files/fd8857f0-81ff-42f3-943d-ecfe878c0532/18568775391.pdf
    • https://s3.amazonaws.com/pibabopuduj/ascii_art_maker_pro_apk.pdf
    • https://s3.amazonaws.com/fosawef/japanese_hand_saw_and_guide_kit.pdf
    • http://megigezorozo.atwebpages.com/livros_brasileiros_para_jovens.pdf
    • https://s3.amazonaws.com/risisipajole/swift_dateformatter_localized.pdf
    • https://s3.amazonaws.com/woneketelak/calvin_and_hobbes_wallpaper_phone_hd.pdf
    • http://gakamaxoluzes.atwebpages.com/romajaxumopuvaxarunakox.pdf
    • https://s3.amazonaws.com/miledu/how_to_sync_afterglow_ps3_controller.pdf
    • https://s3.amazonaws.com/mufukep/honda_civic_2015_manual_uk.pdf
    • https://s3.amazonaws.com/suximawo/apache_flume_1._9.pdf
    • https://uploads.strikinglycdn.com/files/f18842cd-3867-4128-896d-cdbd72477a0e/57041588963.pdf
    • https://uploads.strikinglycdn.com/files/3f3c9efb-3a62-41b5-a0cd-ab0bb52b88bf/4555323444.pdf
    • https://uploads.strikinglycdn.com/files/8b4baa73-f789-4889-9214-e178c902dec5/garmin_nuvi_2757lm_mount.pdf
    • https://s3.amazonaws.com/fipijife/1707680226.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_off0000f0db.bin
3b34979e8bc7b844b398883a48f6f780784f6321a141f1618cd3aa507a24793d
pdf-font-stream PDF embedded font (sfnt) at offset 0xF0DB 4988 bytes
font_01_sfnt_off00010177.bin
4b54c85644501d3325f0722844f874bc4ee7b02c84e99a3e05c3896b804c5067
pdf-font-stream PDF embedded font (sfnt) at offset 0x10177 12800 bytes