Malicious PDF — malware analysis report

Static analysis result for SHA-256 ef4ed963c5d0b83e…

MALICIOUS

PDF

80.0 KB Created: 2021-04-06 08:10:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ec52b56f72c0b48470bfee9569c584ab SHA-1: e251231efdd03397f0a59452c8adaad9b53b4c23 SHA-256: ef4ed963c5d0b83e7a1d19906fd8bd56b2213fda3cd0e894d6c380e22acba23a
96 Risk Score

Malware Insights

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

The PDF file 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 heavily obfuscated, appears to be a lure related to computer types, aligning with the embedded URL's keyword.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://maypoin.ru/wix?keyword=tipo+de+computadora+peque%25C3%25B1a
    • http://fitdieta.com/olympus_camedia_c-5050_zoom_digital_cameratljt8.pdf
    • http://tryadasert.online/naruto_blazing_apk_mod_2._6._1x86dl.pdf
    • http://nncucuucuc.space/14459466735tdwet.pdf
    • https://cdn.sqhk.co/menaleratupo/gfhcXji/face_changer_2_mod_apk_download.pdf
    • http://lewodazegozi.iblogger.org/2013_jeep_grand_cherokee_battery_change.pdf
    • http://servempieza.site/relogogaoyxaw.pdf
    • https://cdn.sqhk.co/xuruwivagezu/xRicFhd/weather_radar_map_ottawa_ontario.pdf
    • http://fresh-ita.space/can_i_connect_my_motorola_baby_monitor_to_my_phonezshuv.pdf
    • http://aduo5.online/734626887157zaff.pdf
    • http://egosikenclub.com/how_to_connect_an_onn_wireless_mouse89rda.pdf
    • https://cdn.sqhk.co/talokelom/bibichh/34095341895.pdf
    • http://douchehq.xyz/4917331330qki2h.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/8c9f14f8-1688-4ca0-a8c1-12765d5ecd4c/pegofutaludi.pdf
    • http://pusevim.epizy.com/74918395913.pdf
    • https://uploads.strikinglycdn.com/files/3b6ac4f5-8691-4e60-908a-017b81aa1e6c/6658105779.pdf
    • https://uploads.strikinglycdn.com/files/9c9d95c5-2b56-4485-ab9f-e37cad154cc0/71581913418.pdf
    • http://nepowatalol.epizy.com/badeven.pdf
    • https://uploads.strikinglycdn.com/files/abb58130-2a96-4854-853e-fc7a6fb87ddf/calendario_sep_2019_y_2020_cdmx.pdf
    • https://uploads.strikinglycdn.com/files/fad210f3-182c-4efd-85fb-08a79d772339/94533939016.pdf
    • https://uploads.strikinglycdn.com/files/450949dc-d80b-4820-84cd-487f6933cfff/is_ipad_mini_2_still_good_in_2020.pdf
    • https://uploads.strikinglycdn.com/files/e1d76bab-3f7b-4473-9af4-201aeae55e47/how_to_use_sd_card_galaxy_tab_a.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_off0000f8d7.bin
cf16196a7a89c861940182050e495ad1c27374048891473ad9639948ca0894c8
pdf-font-stream PDF embedded font (sfnt) at offset 0xF8D7 5296 bytes
font_01_sfnt_off00010a84.bin
3ef4278b763ebf51746e3f42a6faebfa58b4e51d09d3743b4fc84b6c36289d02
pdf-font-stream PDF embedded font (sfnt) at offset 0x10A84 11764 bytes