Malicious PDF — malware analysis report

Static analysis result for SHA-256 4dc624e6908f1038…

MALICIOUS

PDF

77.4 KB Created: 2021-04-19 16:02:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b133c3f891bdd2a6f7287a60b159c5ad SHA-1: d6effe16b2c946e3f2b5af3d1f284702e4e970cc SHA-256: 4dc624e6908f103882f2e3d3972dd81eb92e81d025603f18dca30cfacc7ec036
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains an external URI pointing to a suspicious domain, likely intended to host a malicious payload or redirect the user to a phishing site. The document body, though heavily obfuscated, appears to contain keywords related to the URL, suggesting a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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/strik?utm_term=shimano+di2+battery+charging+problems
    • http://bagedejatobino.22web.org/convert_base64_string_to_angular.pdf
    • https://static.s123-cdn-static.com/uploads/4421460/normal_5fec670023055.pdf
    • http://neriwozu.22web.org/batuan_sedimen_klastik.pdf
    • http://koxokolafobim.iblogger.org/ms_windows_keyboard_shortcuts.pdf
    • http://kesisofawa.mygamesonline.org/actual_cannibal_shia_labeouf.pdf
    • http://mofirixubutibi.getenjoyment.net/acreditacion_universitaria.pdf
    • https://cdn-cms.f-static.net/uploads/4482206/normal_605b819757397.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://morinebasipu.rf.gd/springer_books_free.pdf
    • http://felepenedebopus.epizy.com/gedulizape.pdf
    • https://s3.amazonaws.com/xonobijikivo/59556770637.pdf
    • https://b01cffea-7a05-49e8-9781-04202a21c04b.filesusr.com/ugd/d5d855_648341170af046f9b8644b5e1595bba8.pdf?index=true
    • http://joxopup.epizy.com/tumaczenie_zda_angielski.pdf
    • https://s3.amazonaws.com/jemazejodep/99223218477.pdf
    • http://wuxosalilujaza.atwebpages.com/9320251015.pdf
    • https://b304dada-1952-41b2-af44-d16a3232bb3f.filesusr.com/ugd/c19c34_ff884ac9af5946c7a6e777d154fcc7c6.pdf?index=true
    • http://naxefugoxodikow.atwebpages.com/furulavoj.pdf
    • http://kapirexazi.onlinewebshop.net/change_is_gonna_come_lyrics_olly_murs.pdf
    • http://dilexaluv.epizy.com/74821699258.pdf
    • https://3e3188f7-d9e9-48da-9af6-4e6760718ee0.filesusr.com/ugd/4f7562_f79390a485584c97bb30d09da98226bb.pdf?index=true
    • https://s3.amazonaws.com/mojivikapeti/the_checklist_manifesto_how_to_get_things_right_atul_gawande.pdf
    • http://xoroniwogogo.rf.gd/35231580472.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_off0000e3ef.bin
17fefd850a7d0f16607a0045cd9f065286683c98b7f90f82ce32d1b9ccdc82d7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE3EF 5964 bytes
font_01_sfnt_off0000f805.bin
bcf7e3c213c898e27b695a5fa459322c3d940898d1299512568061cb6ba2a31f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF805 1896 bytes
font_02_sfnt_off00010133.bin
efd72fe81130ba495c1edc4217961fe0bbd6586843143101fb3bfefe3e5f3441		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10133 11404 bytes

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