Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec549afcca62e7fe…

MALICIOUS

PDF

82.2 KB Created: 2021-01-21 02:16:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 3b54609fdf62a5dd86d0d85d7702163b SHA-1: 043c022271839f683781cc324dbc1a95167b5dc8 SHA-256: ec549afcca62e7fe941e18023756393f7699c50dfcc54d691715aaea6be6203b
162 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically pointing to 'https://cctraff.ru/aws?utm_term=checkpoint+5600+configuration+guide'. The ML classifier also strongly flagged this PDF as malicious. While the document body is heavily obfuscated and unreadable, the presence of a malicious URL and the overall context suggest a phishing or malware distribution attempt, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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://cctraff.ru/aws?utm_term=checkpoint+5600+configuration+guide In PDF document text
    • https://site-1185570.mozfiles.com/files/1185570/28407662740.pdfIn PDF document text
    • https://gigazubexu.weebly.com/uploads/1/3/4/6/134613152/dovupajawen-pekubarudojonit-gukopotujameda.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384026/normal_5faff07579d1f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471948/normal_5fff3fb05565d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402940/normal_5fe07e3f72ca0.pdfIn PDF document text
    • https://site-1166732.mozfiles.com/files/1166732/best_mail_merge_for_google_sheets.pdfIn PDF document text
    • https://pafazemewo.weebly.com/uploads/1/3/4/5/134517711/gikalarunir.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4499282/normal_5fc8148099e26.pdfIn PDF document text
    • https://site-1203694.mozfiles.com/files/1203694/cyber_defence_platform.pdfIn PDF document text
    • https://kuzigojuzomuw.weebly.com/uploads/1/3/2/6/132683135/jatipugixadeg.pdfIn PDF document text
    • https://cdn.sqhk.co/zolaxadivowe/pI8ifou/puruveburupapok.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444117/normal_5fe410dfd1ddb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382197/normal_5fd1080476825.pdfIn PDF document text
    • https://genunilime.weebly.com/uploads/1/3/4/3/134344847/jepugu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4492915/normal_5fb4d88974d02.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418574/normal_5fabf05925c73.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nixewawomito.epizy.com/falaknuma_das_arerey_manasa_song_ringtone.pdfIn PDF document text
    • http://bejutamukedus.epizy.com/assistir_globo_reporter_ao_vivo_pela_internet.pdfIn PDF document text
    • http://pukafenofi.epizy.com/pinireravibogi.pdfIn PDF document text
    • http://siwodonodefofo.epizy.com/zoxaxepafevajafapowep.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eb15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB15 5176 bytes
SHA-256: 210584b0f32979350b7d6f784094224f6cd54b9d484ae711bca7e2cdc843d05f
font_01_sfnt_off0000fcdb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCDB 5596 bytes
SHA-256: c841a6413805116eb765285bfc15ab2dd107a06b1eb983c381d058b7e3238406
font_02_sfnt_off00010fe1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FE1 13428 bytes
SHA-256: 2f52069e2a149dd8655c52ba463ff6466f109e0d8e1f1ba4b454ab8c363c38ef

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