Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf9572dc2d4194a2…

MALICIOUS

PDF

85.5 KB Created: 2021-03-21 08:56:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d12fc0737ecad7873e6c2dca4f405f50 SHA-1: 9fc18462740c7c02728c1233a3d238fbccb68b9d SHA-256: bf9572dc2d4194a22a7968b029280b16288e42e73c66f7229204d71dfc184574
96 Risk Score

Malware Insights

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

The file is a PDF containing an embedded URI pointing to a suspicious domain, identified as malicious by ClamAV and an ML classifier. The document body, though heavily obfuscated, contains text fragments that suggest a lure related to 'Aphis form 7001 free'. The presence of external URIs strongly indicates an attempt to redirect the user to a malicious site, likely for phishing or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://botokaw.ru/123?utm_term=aphis+form+7001+free
    • http://lurubalopare.sportsontheweb.net/convert_to_editable_word_document_online_free.pdf
    • http://dakajak.medianewsonline.com/worugupajedetanesede.pdf
    • http://pofuxubilet.sportsontheweb.net/cannot_open_printing_preferences.pdf
    • https://rapexukiwivusa.weebly.com/uploads/1/3/4/8/134856806/9983116.pdf
    • https://xegoratan.weebly.com/uploads/1/3/2/7/132712572/gegituliridizu.pdf
    • https://gobodukigibab.weebly.com/uploads/1/3/1/8/131856162/27f8134093.pdf
    • https://cdn.sqhk.co/vexedobasof/lWmhghj/new_guitar_mp3_ringtone_download_pagalworld.pdf
    • https://cdn.sqhk.co/puvubuzu/Jmc9nif/futimisizidi.pdf
    • https://cdn.sqhk.co/riroxale/Gghjfbm/square_enix_software_token_emergency_removal.pdf
    • https://cdn.sqhk.co/kawurefeki/gUA0LBM/trending_nakhra_video_status_download.pdf
    • https://cdn.sqhk.co/zoluxoni/hefKfZR/streamlabs_channel_points_commands.pdf
    • https://cdn.sqhk.co/wazotifuk/6SSjiEt/senavoluk.pdf
    • http://fuzuwozozat.mypressonline.com/cpap_neonatus.pdf
    • https://cdn.sqhk.co/visobipibe/MhaIhgB/sims_freeplay_mod_apk_vip_points_2020.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/gawabog/new_punjabi_song_wapking._cc.pdf
    • https://uploads.strikinglycdn.com/files/14466aac-2891-4613-8486-5446bd7ff459/how_to_fix_a_frigidaire_upright_freezer.pdf
    • https://uploads.strikinglycdn.com/files/154185d0-8850-4476-b477-9368a4bdf37b/wujejoxepomejoz.pdf
    • https://s3.amazonaws.com/xakajoziwibi/13097079356.pdf
    • https://s3.amazonaws.com/dozore/flysheet_tenda_dome.pdf
    • https://s3.amazonaws.com/dinigugaxej/88857224152.pdf
    • http://dolanuvusipegu.myartsonline.com/50671101085.pdf
    • https://uploads.strikinglycdn.com/files/c052ef56-11e5-4d37-b65c-76bd72837740/diablo_3_crusader_roland_build_shield_bash.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_off0001018f.bin
a6f1d750a8abc0cc569cfbf2bb981319f868195e77dde6fd0e1a46a8ea05ba91		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1018F 4764 bytes
font_01_sfnt_off000111c0.bin
24398bd80dddaa81ba7fbcaa7f280345a894e96d09d6df75eacb753e740075a9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x111C0 11528 bytes
font_02_sfnt_off00013906.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13906 4324 bytes

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