Malicious PDF — malware analysis report

Static analysis result for SHA-256 f9f63d06c58c4f36…

MALICIOUS

PDF

78.8 KB Created: 2021-03-23 13:51:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 395b6a7e84537dcbd8bccfa527360f61 SHA-1: b049ef1c64398a07fd11b9022072b339fc132d8a SHA-256: f9f63d06c58c4f36efb4b2ef25024680cff086091e7baa9c911cfbcb0154a37b
96 Risk Score

Malware Insights

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

The PDF contains an embedded URL that, when clicked, leads to a domain associated with malicious activity. ClamAV detection and ML classification strongly indicate malicious intent, likely for phishing or malware distribution. The document body, though heavily obfuscated, suggests a lure related to German grammar exercises, aiming to trick users into clicking the malicious link.

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://jacksth.ru/award?keyword=adjektivdeklination+nach+dem+bestimmten+artikel+%25C3%25BCbungen+pdf
    • http://pc-remont.website/ielts_11_test_3_listening_answeraitcq.pdf
    • http://proita.fun/79252178049qnoja.pdf
    • https://cdn.sqhk.co/golemejexeno/agdiac7/maps_of_clash_of_clans_2020.pdf
    • http://akillidestekbasvuruformu.online/tugitatavifabipuwirup3733u.pdf
    • https://cdn-cms.f-static.net/uploads/4379851/normal_5fea03572dc68.pdf
    • http://fiziwafofekaku.mygamesonline.org/not_using_the_word_very.pdf
    • http://naturebiolog.fun/plenty_of_fish_dating_appv76f2.pdf
    • http://vetobiz.sportsontheweb.net/44337219075.pdf
    • https://static.s123-cdn-static.com/uploads/4462694/normal_5fccf80f6f516.pdf
    • http://rudovatimokasum.medianewsonline.com/nonifalokejalimimegozaxu.pdf
    • https://cdn.sqhk.co/zamikukodef/DghcVja/bafubixaxipavakijaw.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://godidab.epizy.com/manitoulin_island_visitors_guide.pdf
    • http://mulezajite.rf.gd/waropuxomarigarifiz.pdf
    • http://tipakofixu.epizy.com/oneplus_android_10_gestures.pdf
    • http://xubexiv.epizy.com/51014450756.pdf
    • https://s3.amazonaws.com/pirosisob/bollywood_whatsapp_status_video_song.pdf
    • https://s3.amazonaws.com/nafoxuda/nepunolexebelomesikonosat.pdf
    • https://s3.amazonaws.com/wogikokuzotaxa/29595217065.pdf
    • http://noxetowukamav.epizy.com/bookies_list_crossword_answer.pdf
    • http://natizuf.onlinewebshop.net/cristianismo_puro_e_simples_completo.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e2d8.bin
76e93d32c63fc2917698a27d8bf063499a88ca6cbdd3b85b0c12c188b4f8e0ad
pdf-font-stream PDF embedded font (sfnt) at offset 0xE2D8 5900 bytes
font_01_sfnt_off0000f697.bin
50d3a7bb99eabb0d0db4046494b56da8498d7f2a03b960c15bd32ff57a79a0b5
pdf-font-stream PDF embedded font (sfnt) at offset 0xF697 11720 bytes
font_02_sfnt_off00011d6c.bin
ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230
pdf-font-stream PDF embedded font (sfnt) at offset 0x11D6C 4324 bytes