Malicious PDF — malware analysis report

Static analysis result for SHA-256 a5e0fad3fcc9c0cb…

MALICIOUS

PDF

66.9 KB Created: 2020-12-17 14:30:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 1e6d0fa1d269906dc441d048ed4b544d SHA-1: 6bae74887499773629f22349e1bbdf50709f5a82 SHA-256: a5e0fad3fcc9c0cb7520fe0b896557f0d001ed424219b2e110cc7d870553eef8
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 for a malicious redirector link pointing to 'https://traffmen.ru/strik?utm_term=breaking+the+spanish+barrier+level+1+beginner+answers'. This URL is likely used to lure victims to a malicious site. The ML classifier also strongly indicated maliciousness. No scripts were extracted, but the embedded URL is sufficient evidence of a phishing or malware distribution attempt.

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://traffmen.ru/strik?utm_term=breaking+the+spanish+barrier+level+1+beginner+answers In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/97623cb0-b455-4f1e-818b-7e5ad9e0afee/surep.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b6024e29-54ce-4d7c-bea7-3c852b2ef2f4/talkatone_app_download_for_windows_10.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9f91a91a-2fb1-4232-8c13-255fb19e08d8/verb_conjugation_spanish_practice_worksheets.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5f2a4c9a-35b4-43c1-813d-481f2a964907/53313432883.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/efae2926-3c78-44c8-ba61-cb8233bc48bc/guwobutuxutusafo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/18c90ff8-1acc-47cb-a107-83ae207d6a62/eagles_game_score_tonight.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0e7f0523-a5ee-4d62-b7af-e98140a3148b/70395144514.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/21f146f2-2bb3-4b1f-a1d1-4e31b931e601/gotowezog.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe16c43c02f22b9dd55b47/1606293189216/larimodagofijepin.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a2ee7d3d-c641-4438-b648-296ce106fad5/ace_combat_7_soundtrack.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/73ea9e0c-87e9-4cce-9770-eb95b05fc1b0/financial_accounting_10th_edition_download.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_off0000c881.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC881 5540 bytes
SHA-256: 449398c5f1481de36a2a31299a755a69be593ba9c980f80ccf46fd0903315ef7
font_01_sfnt_off0000db6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB6D 10548 bytes
SHA-256: 73f6e27cb73a3076ef2462235bb4bbfe85ddce6c0cad988241e86f6605dccd56

Open this report in the interactive analyzer, or submit your own file for analysis.