Malicious PDF — malware analysis report

Static analysis result for SHA-256 cab0e578f773d09d…

MALICIOUS

PDF

119.7 KB Created: 2021-07-12 21:53:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 178d5fde91eed0ef5208f0a3615c1506 SHA-1: 72f0b5e6af5f031ea76af9c3031f6b38ac2c5a25 SHA-256: cab0e578f773d09d61b3e678d438a584ee91313e02810a61f43bff9dc8377822
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 embedded URI that acts as a redirector, likely for a phishing campaign. The PDF_SEO_UTM_REDIRECTOR_LINK heuristic specifically indicates an image lure leading to a free-download phishing attempt. No scripts were extracted, but the presence of a redirector URL strongly suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7359

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/~3/7R6buoffwiA/square?utm_term=microbiological+contamination+of+food PDF link annotation
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e84b97f87ec6517a5a5d94/1625836439310/rifogonosufumagagare.pdfIn PDF document text
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60e9111d787dde1a90ad7de6/1625887005777/kixufodudunisiw.pdfIn PDF document text
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60e785eb40eb2a7af26c9ec0/1625785835645/how_long_does_it_take_for_a_painted_turtle_egg_to_hatch.pdfIn PDF document text
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60e9426c309bd63f3d8711ce/1625899628167/a_simple_favor_full_movie_123movies.pdfIn PDF document text
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ec89370cf33f708d7aff2d/1626114359565/the_time_for_earth_revolution.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 4

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_off000172ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x172AE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00018ac0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18AC0 17524 bytes
SHA-256: ffd5ea971bb8b619783fc89c3cc9b8cb77f7ba52e4477f33c2d8d062b6b9bb49
font_02_sfnt_off0001b8f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B8F3 10652 bytes
SHA-256: 94e4b242e8357f6aea5870ea05c71552207acbe6e9b9fb445d95e5ad0647ce05

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