Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1cf3335a7fdd58a…

MALICIOUS

PDF

71.3 KB Created: 2021-03-03 17:29:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: c8c6e72556897e743e08dee3f120ca6f SHA-1: 43c57139b4510e38a41127c288ca66cc870be07d SHA-256: e1cf3335a7fdd58a880eee554c6503893dbdb083579ba37d95a5c728993442a5
194 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF file was detected as malicious by multiple heuristics and an ML classifier, indicating it is a phishing or trojan delivery attempt. It contains embedded links that redirect to suspicious domains, including one that appears to be a lure for downloading an application. The presence of PDF-specific malicious redirector rules and the ML classification strongly suggest a malicious intent to exploit users via deceptive links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.
  • Image-heavy PDF with invisible link to suspicious domain high PDF_SUSPICIOUS_LINK_LURE
    PDF is a small image-heavy lure with invisible link annotations that send the user to a suspicious high-risk-domain URI. This matches credential-phishing carriers where the visible document is only a prompt and the real collection flow happens on the linked website.
  • 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://yafferge.ru/wix?keyword=download+apk+lucky+patcher+tanpa+root+apkpure In PDF document text
    • https://static.s123-cdn-static.com/uploads/4374360/normal_5fed5fd56e079.pdfIn PDF document text
    • http://nogezat.iblogger.org/ganipuvasesekezete.pdfIn PDF document text
    • http://radanews.site/chill_music_playlistjgs6r.pdfIn PDF document text
    • http://differencecheats.net/nobusivuzigujadx7h28.pdfIn PDF document text
    • http://life-news.tech/vasogafiwojexcvekn.pdfIn PDF document text
    • http://heleogose.online/kesutupeletezowemifixomoph6bzz.pdfIn PDF document text
    • http://managerprogram.live/27110501960hl36p.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4373776/normal_5ffe0376eb5cb.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://bogalibamadom.myartsonline.com/how_to_insert_mendeley_citation_in_word_2016.pdfIn PDF document text
    • https://s3.amazonaws.com/mubefula/domestos_thick_bleach_data_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/jamuluvuvava/32602529986.pdfIn PDF document text
    • https://s3.amazonaws.com/jezaxojipevu/degofakatinedabidesi.pdfIn PDF document text
    • https://s3.amazonaws.com/sabegokek/24346057310.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_off0000cdbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDBF 5076 bytes
SHA-256: 5f83d13fa3153df440198b66f6717c5f49d7f0ff912ceffc0dcced3dfaf86aa2
font_01_sfnt_off0000df11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF11 10280 bytes
SHA-256: b87b83ecfa0eb9d439957f5a78c65917af7fb231b1493e3e2723f0df83f22195
font_02_sfnt_off00010241.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10241 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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