Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4e0ca3c0f47fe85…

MALICIOUS

PDF

115.9 KB Created: 2021-02-03 23:24:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 41a6ace6957e0045fe62a60ca6e21bf3 SHA-1: 334a17d4b4bf61cce485b6e38ffda16e56ac17a1 SHA-256: e4e0ca3c0f47fe85521a049257bccbdf6a02d0d293d1ef121599152c062f8a9d
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, 'jottigo.ru', which is likely used to host a malicious payload or phishing page. The document body, though heavily obfuscated, suggests a lure related to 'Cbs news morning reporters', indicating a social engineering attempt to trick the user into visiting the external URL.

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://jottigo.ru/aws?utm_term=cbs+news+morning+reporters PDF link annotation
    • http://hackins.site/muvosisarubugemalokashs43o.pdfIn PDF document text
    • https://cdn.sqhk.co/tororukiwuri/GcQgeib/poblano_peppers_nutrition.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475397/normal_5ff4c2f1c1aaa.pdfIn PDF document text
    • http://muslims.net/49933133031bcswv.pdfIn PDF document text
    • https://cdn.sqhk.co/pimibopugugo/uia7jed/dice_tower_top_100_youtube.pdfIn PDF document text
    • https://cdn.sqhk.co/zewumirapeb/RiihegV/download_game_zombie_tsunami_apkpure.pdfIn PDF document text
    • http://chestlune.online/11_plus_synonyms_and_antonyms_worksheetsp2u1l.pdfIn PDF document text
    • https://cdn.sqhk.co/dovawowo/Y1jaohi/download_az_screen_recorder_pro_no_root_iphone.pdfIn PDF document text
    • http://mignonette.space/run_fun_3d_adventure_walkthrought7nm0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/fobupojowojon/bedding_sheets_sets.pdfIn PDF document text
    • https://s3.amazonaws.com/xirixepo/95382343902.pdfIn PDF document text
    • https://s3.amazonaws.com/wizidimawag/agenda_for_a_meeting_format.pdfIn PDF document text
    • https://s3.amazonaws.com/lonozote/botanique_at_bartley_floor_plan.pdfIn PDF document text
    • https://s3.amazonaws.com/nakevoja/calculus_michael_spivak.pdfIn PDF document text
    • https://s3.amazonaws.com/donarepemi/sajatexilozopibew.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00018fb1.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x18FB1 28408 bytes
SHA-256: a42d2fb56e04fe7017220ef49ff34045a731b14602477ca9c3b27c98fbc21f74
font_00_sfnt_off000158b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x158B0 5036 bytes
SHA-256: 075e83e57dfd67b83847eade920924236df57fd7d74486a6ab57a6c5686e63c6
font_01_sfnt_off000169c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x169C7 11184 bytes
SHA-256: 273be196d87edf7b09650c6a9f15d1e2f56ddd24eeea8cf87fe1a232239715ff

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