Malicious PDF — malware analysis report

Static analysis result for SHA-256 d88c4246abae6cd0…

MALICIOUS

PDF

71.7 KB Created: 2020-12-18 06:51:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: aa6bd7e04e53c48d0ebc012cf0d2497a SHA-1: 06217b0e7b6294170555bfe225a6e4b3071733aa SHA-256: d88c4246abae6cd0c699807f0b0e5747bd2d33433a61874391ae931b5f1d2f0d
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a critical heuristic firing indicating a malicious redirector link to 'https://traffmen.ru/strik?utm_term=teachings+of+jesus+catholic'. This URL is the primary indicator of malicious intent, likely serving as a lure for phishing or to download further malicious content. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://traffmen.ru/strik?utm_term=teachings+of+jesus+catholic In PDF document text
    • https://cdn-cms.f-static.net/uploads/4387060/normal_5fa6f18dd56bc.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd2326df920e6c355fb9b5/1606230822807/pujudusagagedadajitewolix.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5b6f4038-f122-4ae5-ad3e-973083625a3c/serena_safari_mp3_song_download.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5adc7d26ff1194f948784/t/5fd040b226d54b3c06cca4f2/1607483571653/loxebo.pdfIn PDF document text
    • https://s3.amazonaws.com/muvemasoxaji/84565116158.pdfIn PDF document text
    • https://s3.amazonaws.com/genukopapovixo/mental_capacity_assessment_template_for_care_homes.pdfIn PDF document text
    • https://s3.amazonaws.com/tibitexil/4378509097.pdfIn PDF document text
    • https://s3.amazonaws.com/xidulumexi/duck_life_space_free_unblocked_games_66.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e9f80996-799a-4541-adaa-4dcad7a44199/kedefejoxabutamalatatu.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fce205dccd2b773201d4b23/t/5fd63135164d0f203c74a235/1607872823266/ielts_general_reading_and_writing.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/56819ae6-429f-4ea2-b20a-553b3d012c77/nefulisupogepi.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_off0000dc4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC4C 5072 bytes
SHA-256: 8c3ec196e0b7c3ef018a26790fef3315ca2e459682fc74676dc67e00093878a1
font_01_sfnt_off0000ed96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED96 10736 bytes
SHA-256: b54c6e201d38993d8cbb8e8676dafc00a3ff81cdb2e5769f5b7431caf61e0fe3

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