Malicious PDF — malware analysis report

Static analysis result for SHA-256 62e1ce1ee7ac378d…

MALICIOUS

PDF

71.6 KB Created: 2021-01-14 06:10:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: ecf1a8d30a7836c77882dd23dc2aa9e4 SHA-1: d0d51d7b66ae175bf605b35e8723f852c87c804c SHA-256: 62e1ce1ee7ac378da99aeb88ef94f92cedaae1aa68c922dd3922a19158415854
222 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, with several identified as redirectors to malicious infrastructure. The presence of a 'download button' heuristic and ClamAV detection further supports a malicious intent, likely for phishing or distributing further malware. No scripts were extracted, but the document's structure and embedded links strongly indicate a malicious workflow.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://ggtraff.ru/aws?utm_term=printable+brain+break+cards+pdf In PDF document text
    • https://cdn.sqhk.co/lituxopevuk/gjerghV/sogoradesinozojawugipez.pdfIn PDF document text
    • https://cdn.sqhk.co/mavozopofug/e7ijfib/pc_games_more_about_greek_mythology.pdfIn PDF document text
    • https://cdn.sqhk.co/gevajoke/hfrgwxY/wininogun.pdfIn PDF document text
    • https://cdn.sqhk.co/sovokeduseb/hhfgjhi/yearly_subscribe_zoomerang_short_videos.pdfIn PDF document text
    • https://magojumenuta.weebly.com/uploads/1/3/4/3/134361537/3732271.pdfIn PDF document text
    • https://xolipesu.weebly.com/uploads/1/3/4/6/134672505/texigesuwigoparediwa.pdfIn PDF document text
    • https://site-1174278.mozfiles.com/files/1174278/boku_boku_game_pc.pdfIn PDF document text
    • https://cdn.sqhk.co/rubovadu/4mggdh1/27309356038.pdfIn PDF document text
    • https://cdn.sqhk.co/dorejewibiz/F0jjhah/twitter_download_gif_app.pdfIn PDF document text
    • https://cdn.sqhk.co/jigavozef/hajdiiE/pilot_royale_mod_apk.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/gelawiweza/53647415819.pdfIn PDF document text
    • https://s3.amazonaws.com/tumuzu/asphalt_8_airborne_mac.pdfIn PDF document text
    • https://s3.amazonaws.com/faluzotixupi/spmc_apk_download_for_kindle.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dbd2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBD2 5356 bytes
SHA-256: d3a30b11cd4f2e936db68374a18593f87bc883124a3de6456007fd3bae925d12
font_01_sfnt_off0000ee0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE0D 10324 bytes
SHA-256: e58ece31fe8e1670a063a18ec07d0c33c13c146dc8707dd3883d303dcb903615

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