Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0575028f699712c…

MALICIOUS

PDF

90.4 KB Created: 2021-07-15 08:45:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: b24d8c69697e569c0bab110b3668ef7d SHA-1: 43b081e7913aa804342fc4fa82ccb308fbf7d7b0 SHA-256: d0575028f699712c1f0d7ef384750bed0af65e043536e90b192156cc9c394cba
136 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains an embedded URI and an image lure that redirects to a URL, identified as a free-download phishing attempt. ClamAV and an ML classifier also flagged this PDF as malicious. While no scripts were directly extracted, the PDF structure and the redirection indicate an attempt to lure users to a malicious site, likely for phishing or to download a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8172

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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/uzX87CUNjRg/square?utm_term=pc+performance+test+software PDF link annotation
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60e7e751687a3d659a4c9388/1625810769249/previous_year_gate_question_paper_cse.pdfIn PDF document text
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60edb746881afe0f0cee6f9a/1626191686084/2001509591.pdfIn PDF document text
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60efcaa33db90d3c356dca1b/1626327715813/zoboniteputiwimuvubeful.pdfIn PDF document text
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60ede33bc6126f45c3e263c7/1626202939375/father_in_heaven_verse.pdfIn PDF document text
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60e8b6b1566cc9679b7ea53d/1625863857973/nebivedanutumosozemija.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

Related samples 2

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001015d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1015D 10588 bytes
SHA-256: 50391bf47c5c49873e211458511f12f1db4069f26862772a162172d2a1d83802
font_01_sfnt_off000119a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119A4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000131b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x131B6 16864 bytes
SHA-256: c2ba9ec98bbedd12cb22a631d4f9c97cf1d18248950c3977ab141f18be9cf7ec

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