Malicious PDF — malware analysis report

Static analysis result for SHA-256 0779f7679f8e05b9…

MALICIOUS

PDF

70.3 KB Created: 2020-12-17 06:45:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 58fb95919fe4f72961076a124dec7921 SHA-1: 89815f3ddde3e1a2016f21cf4e23e2b60b23b928 SHA-256: 0779f7679f8e05b9ffcdc5b73bf57ee5d209b5cd7f97c72d1e6d3c0138bd9539
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 URL, identified by the 'PDF_MALICIOUS_REDIRECTOR_LINK' heuristic. The ML classifier and ClamAV also flagged this file as malicious. The document body, though heavily obfuscated, contains text related to 'Quotes about greed and karma', suggesting a social engineering lure. No scripts were extracted, but the presence of a malicious URL is a strong indicator of a phishing or malware distribution attempt.

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://gettraff.ru/strik?utm_term=quotes+about+greed+and+karma In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/pisik/team_viewer_filehippo.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5662f0b6b03258f5376ce/t/5fcbd10064036b614397f67b/1607192854865/fafemida.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c81803cc-933f-4267-b8e1-81f5f16e2340/75759891377.pdfIn PDF document text
    • https://s3.amazonaws.com/jozetej/2276115511.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7fedf53a-1a5a-4a99-b95a-a8af038808cc/walther_wa_2000_canada.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc79de6aa0dc1643a3271d4/t/5fcf57927c36362741adc348/1607423891626/67272373322.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0656fa53-a777-4eea-b7ff-6a41584a06b0/44275062838.pdfIn PDF document text
    • https://s3.amazonaws.com/mipeboro/small_scale_industries_in_india.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0eb79e5c7695ca99bb922/t/5fc286cb3f75b16643262f0a/1606584012064/23167517433.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5285e9d9-c288-4d1d-9a2e-2f2a5fd00238/numeros_representados_con_dibujos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/749ebd53-68a9-4605-95d7-d290518f4dec/bemepepivonumuta.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/25b111b9-ffb9-4042-9231-878f7ef08ecd/pevekako.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_off0000d87e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD87E 5380 bytes
SHA-256: b4cebf5d5aca66d72ac3be5092360883d0abdd139b69cb20bef957017c897347
font_01_sfnt_off0000eab5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAB5 10060 bytes
SHA-256: be96c0921c1ff6f28504a9c65fa1793e628a2ab2ef925e7dac03664032fb3366

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