Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb0deccbaadb58fd…

MALICIOUS

PDF

110.6 KB Created: 2021-03-16 13:36:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 27bbd30ff479da15a639a3a0d83e355b SHA-1: 292b3c8121f791a988ed8255c38153f532831025 SHA-256: cb0deccbaadb58fde91671d89ca09a745b74daafa9c6af065a2481c7e4286258
104 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of an external URI and a heuristic for a download button suggests a phishing or social engineering attack. Although no scripts were extracted, the PDF structure and external link point towards a malicious document designed to trick users into downloading further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://jumiwimov.ru/award?keyword=miller+and+levine+biology+online+textbook+macaw+pdf
    • http://kedugobepuged.mywebcommunity.org/sozos.pdf
    • http://rufawefojag.sportsontheweb.net/how_to_draw_a_dragon_eye_video.pdf
    • https://cdn.sqhk.co/rorezina/haH57RD/liserinew.pdf
    • https://cdn.sqhk.co/xijogedobu/ejhgivR/overdrive_ninja_shadow_revenge_2_mod_apk.pdf
    • http://lelekelosutov.getenjoyment.net/what_is_the_poorest_place_in_new_york.pdf
    • https://cdn.sqhk.co/goponebegor/iJEIQaz/92566116706.pdf
    • https://cdn.sqhk.co/zivuwimavez/VidgdUX/duxureribowi.pdf
    • https://cdn.sqhk.co/viforoge/hgjJjhe/street_car_drag_racing_near_me.pdf
    • http://tewazezila.66ghz.com/song_change_chahe_made_halat_wich.pdf
    • http://tetupamino.mywebcommunity.org/mopefilulonubifoza.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/zaxawetawupo/anthony_daasan_hit_songs.pdf
    • https://uploads.strikinglycdn.com/files/55a08bde-f37d-4494-9003-f550f1c045ec/roravagisa.pdf
    • https://uploads.strikinglycdn.com/files/6de87d75-fd27-4d20-8f37-ba67c7f60d20/el_pequeo_vampiro_2017_pelicula_completa_en_espaol_latino.pdf
    • http://zelixedamaxux.rf.gd/business_plans_for_small_businesses.pdf
    • https://s3.amazonaws.com/levumoduf/19039004678.pdf
    • http://nakarajibap.myartsonline.com/60537632554.pdf
    • https://uploads.strikinglycdn.com/files/f236f3ae-515b-4101-9d88-3c98706554b5/neleru.pdf
    • http://gunijeru.rf.gd/evermotion_archexteriors_vol_19_architectural_templates.pdf
    • http://bowubibegejojop.rf.gd/xarosifolonuwezoju.pdf
    • https://uploads.strikinglycdn.com/files/dcea4bf5-4dbd-45f2-a30d-dda37f2e159d/hamlet_act_2_scene_2_soliloquy_translation.pdf
    • http://fomobiwudaz.rf.gd/ccleaner_android_apk_full.pdf
    • https://uploads.strikinglycdn.com/files/4f42c4fb-db24-4299-8fc3-7d173034f1d4/20662010486.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_off00016c42.bin
ad8a58a71eb847bf13c9319a6cdaa57e2666fb1a5c761e9a6a8b6d01bc1be192		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16C42 5828 bytes
font_01_sfnt_off00018039.bin
d972036891edde0a8988ef7992075bbbf95a9a9cf8088a1df3441f9fb0128955		 pdf-font-stream PDF embedded font (sfnt) at offset 0x18039 13136 bytes

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