Malicious PDF — malware analysis report

Static analysis result for SHA-256 96a2dc7e1c4d583b…

MALICIOUS

PDF

79.8 KB Created: 2021-07-14 01:05:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 4b5f8e00f31066ea1ce19003767daeb5 SHA-1: b51afcc2c67d1e523a7644e161b42cc2ea2c0b9b SHA-256: 96a2dc7e1c4d583b27a4d107b2ec008bc1cf21e9bbe066e63d71f5599065e43c
136 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains an external URI and an image lure that redirects to a phishing site, likely attempting to trick users into providing credentials or downloading further malware. No scripts were extracted from this sample, but the presence of redirector links and the overall detection suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9511

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://feedproxy.google.com/~r/sq/ugae/~3/WVKuihPcy9U/square?utm_term=upstream+oil+and+gas+meaning PDF link annotation
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60edba3a221ba579b747626d/1626192442424/posofifotawo.pdfIn PDF document text
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60e92f5a2c5c2f6215c980c7/1625894746760/13488445489.pdfIn PDF document text
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60ee0d754d490f67274e3fa2/1626213749340/cyber_beans_class_10_solutions.pdfIn PDF document text
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60e8d71b5ef51a130ea0fc62/1625872155962/12th_hsc_geography_notes.pdfIn PDF document text
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60ec82ba31b0b43e07e6bf54/1626112698751/povewowupavevogufen.pdfIn PDF document text
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60e8ff2b085b1c120f967d5d/1625882411407/no_whining_meaning.pdfIn PDF document text
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60e8178e80504e0a776c1717/1625823118195/dunanofepumi.pdfIn PDF document text
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60ee09420b33b63bb8c1d079/1626212674790/localhost_port_22_connection_refused.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d723.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD723 17036 bytes
SHA-256: e11c6dba8c16177ef0af78d0fcec99a32466d7875a49183d6c95a7c20e81956e
font_01_sfnt_off00010303.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10303 10744 bytes
SHA-256: f7b40c0f9862f149cb0a277e5f94b1ab7cf13efbcdd47c0743757ea39209bbc3
font_02_sfnt_off00011b7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B7A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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