Malicious PDF — malware analysis report

Static analysis result for SHA-256 954e9233e8e1b6ab…

MALICIOUS

PDF

74.2 KB Created: 2020-11-23 00:19:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: aa4e0e5e4da3bb2b354cddbb5a98a2c5 SHA-1: 6ded3be5604e51423ea94fb2e0f6b94dac590895 SHA-256: 954e9233e8e1b6abdb97ede122dc88f11d6c0e727b4a7384bdc3347e0c0e6af9
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains a link to a known malicious redirector, disguised with text suggesting educational content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect the user to a phishing or malware distribution site. No scripts were extracted, but the embedded URL is the primary indicator of compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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.
  • 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/123?utm_term=ancient+china+activities+for+6th+grade In PDF document text
    • https://cdn-cms.f-static.net/uploads/4417029/normal_5faf442c6febf.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
    • https://s3.amazonaws.com/geradi/weber_carburettors_tuning_tips_and_techniques.pdfIn PDF document text
    • https://s3.amazonaws.com/sitok/12088113960.pdfIn PDF document text
    • https://s3.amazonaws.com/sugaguxagu/33300761931.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/096dc3c6-3532-41bf-8075-935ff3558336/82937638473.pdfIn PDF document text
    • https://s3.amazonaws.com/zinudipir/mivaneweki.pdfIn PDF document text
    • https://s3.amazonaws.com/tobojelusiwi/kibilazepedamopedidowav.pdfIn PDF document text
    • https://s3.amazonaws.com/rorives/tojojolusamopojamamusumow.pdfIn PDF document text
    • https://s3.amazonaws.com/bugutaj/simple_present_exercises_perfect_english.pdfIn PDF document text
    • https://s3.amazonaws.com/rimadefule/73336691438.pdfIn PDF document text
    • https://s3.amazonaws.com/verirejon/77555016650.pdfIn PDF document text
    • https://s3.amazonaws.com/lolijexejomak/i_like_me_by_nancy_carlson.pdfIn PDF document text
    • https://s3.amazonaws.com/risisipajole/triangle_proportionality_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/tulosa/tunemovie.is_mortal_engines.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c33163a9-ee5e-478c-9e5b-6ac9c81a11ed/23886664788.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_off0000d745.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD745 5244 bytes
SHA-256: bec76503cd22ed0625063ca2c30a56cfadb3a194d7cbd9b9b3a2baf0fb0c7c61
font_01_sfnt_off0000e90c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE90C 10712 bytes
SHA-256: 9986503a95a6ed86ebb2b5c4046f4b56043a8f060cbad58130876a5e647f0e1a
font_02_sfnt_off00010d77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D77 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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