Malicious PDF — malware analysis report

Static analysis result for SHA-256 e256e027131f51de…

MALICIOUS

PDF

80.0 KB Created: 2021-03-17 23:45:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e5b39bcdd4c3f4c073aebe79255650ee SHA-1: 1a1bf2c26c9890861fa018ceb92384ff9268db02 SHA-256: e256e027131f51de2e6aacece831ca07829d61542aa849aca199c253dbc4a45d
96 Risk Score

Malware Insights

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

The file is a PDF that contains an embedded URI pointing to a suspicious domain, identified as malicious by ClamAV and a machine learning classifier. The document body is heavily obfuscated, but the presence of the external URI suggests an attempt to redirect the user to a phishing or malware distribution site. No scripts were extracted, but the PDF structure itself facilitated the inclusion of 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://druttle.ru/award?keyword=cook+g.+2020+applied+linguistics+pdf
    • https://cdn.sqhk.co/zipuzedozame/fGhgprv/costume_jewelry_necklace_lot.pdf
    • http://fajujefa.getenjoyment.net/16134953806.pdf
    • https://cdn.sqhk.co/sizafutito/ewtiijZ/gun_stickman_adventure_shooting_game_pc.pdf
    • http://fajujefa.getenjoyment.net/walusuvesakifatix.pdf
    • http://bukapim.mywebcommunity.org/78650366572.pdf
    • https://cdn.sqhk.co/kigowabalo/gidgcgc/infinity_auto_insurance_login.pdf
    • https://cdn.sqhk.co/tenalewi/hc2hbUR/download_game_hungry_dragon_mod_apk_revdl.pdf
    • http://resipowepo.getenjoyment.net/86898726009.pdf
    • http://xuwuvewisin.mypressonline.com/sai_amritvani_lyrics.pdf
    • http://zokidinodajives.getenjoyment.net/how_to_talk_to_anyone_at_work.pdf
    • http://lafutib.sportsontheweb.net/xozesad.pdf
    • https://cdn.sqhk.co/lexoxuxoluvi/gjdhgcs/29415624963.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/tejuvonixag/risperidone_information_nhs.pdf
    • https://uploads.strikinglycdn.com/files/245faf84-d5c4-4033-88d5-4eb18d40f4bb/tosowabelovema.pdf
    • https://uploads.strikinglycdn.com/files/4756a741-a9ba-4461-878a-f5519b0f5d73/wikiwinusoxumenetuv.pdf
    • http://zowofiz.myartsonline.com/xuxojirux.pdf
    • http://saboveliga.myartsonline.com/xalakirimujefusuxosil.pdf
    • https://uploads.strikinglycdn.com/files/bf59d29c-b680-4989-9967-240705685807/unique_baby_girl_names_2020_starting_with_a.pdf
    • http://kaxuwenewutexu.myartsonline.com/26530705132.pdf
    • http://ropupifalapoges.atwebpages.com/dokumen_amdal_pertambangan.pdf
    • https://uploads.strikinglycdn.com/files/0a9b30c8-62b4-40d1-bc08-51124475ae75/60330293375.pdf
    • https://s3.amazonaws.com/wunojipu/pals_provider_manual_2018_free.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_off0000f832.bin
fd460dfb2156b012454bd0cbf700bb02553753d9dc438c5b05be9e91eb7da684		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF832 5500 bytes
font_01_sfnt_off00010b0f.bin
caff7fb3c83f7c8ce406180a6c43e41229c213a69be11d80d45326e3dbb0a603		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10B0F 11940 bytes

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