Malicious PDF — malware analysis report

Static analysis result for SHA-256 af478eee68bf69b5…

MALICIOUS

PDF

91.5 KB Created: 2021-03-20 23:03:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 14bdbbe29b1c21d987ccab1a2f71ecbc SHA-1: 54b324f6adddbb8f4f647b5f26d74f655d46ab59 SHA-256: af478eee68bf69b5f8cff75f1d0ec995c92c1e18b7405a7b2f39a10dfa7319d5
96 Risk Score

Malware Insights

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

The file was detected by ClamAV as Pdf.Phishing.Trojan and flagged by an ML classifier, indicating malicious intent. It contains multiple embedded URLs, one of which, 'https://kuzutuzo.ru/aws?utm_term=iomega+home+media+network+hard+drive+cd%252Fsoftware', appears to be a lure for potentially malicious content. The document body is heavily obfuscated, but the presence of PDF-specific heuristics and numerous URLs suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://kuzutuzo.ru/aws?utm_term=iomega+home+media+network+hard+drive+cd%252Fsoftware
    • https://cdn.sqhk.co/zawileveruz/oxwjh5A/telugu_love_songs_ringtones_com.pdf
    • https://cdn-cms.f-static.net/uploads/4370785/normal_6028f3cc9453b.pdf
    • http://topcreditmonitoring.info/pavekevudetafzgzfj.pdf
    • http://axecheat5.xyz/naxuzuramafo70oxu.pdf
    • https://cdn.sqhk.co/xoxapivasif/heWc7Gc/efootball_pes_2020_achievement_guide.pdf
    • http://canonsburglake.com/43279795549ukzl2.pdf
    • http://drenajkrasnodar.ru/mansions_of_madness_2nd_edition_fan_made_scenariosh21yt.pdf
    • http://bumawusuka.mypressonline.com/fewag.pdf
    • http://brumbum2.xyz/rabexuej6l.pdf
    • https://cdn.sqhk.co/pelebitebi/3MKLgiH/botal_bhar_daru_chadi_dj_mp3_song_download.pdf
    • http://juraxoxodas.scienceontheweb.net/ncert_physics_textbook_class_11.pdf
    • https://static.s123-cdn-static.com/uploads/4425772/normal_5ffe1dc086277.pdf
    • http://maslovauto.ru/birthday_invitation_card_background_templatese2dz.pdf
    • http://helpcopyright-service.com/503_series_sloan_flushmate_tankddydb.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://ketabigumowun.atwebpages.com/the_walking_dead_comic_lista_de_temporadas.pdf
    • https://s3.amazonaws.com/piwanisaj/chhota_bheem_kung_fu_dhamaka_free.pdf
    • https://s3.amazonaws.com/lulelepese/absolute_fout_berekenen_formule.pdf
    • https://s3.amazonaws.com/rikolesafuwofar/70129246924.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_off0001253f.bin
00b3580eae6976ddef109ac7abf06f9a8ff0fea4ee775df7f1d332ce27df95c8
pdf-font-stream PDF embedded font (sfnt) at offset 0x1253F 5592 bytes
font_01_sfnt_off00013838.bin
4e58bee6ae9d280ad3c1bd2500cf0302c10418bed7f9511c67de299babf9d913
pdf-font-stream PDF embedded font (sfnt) at offset 0x13838 11832 bytes