Malicious PDF — malware analysis report

Static analysis result for SHA-256 ede0dd0bb093b447…

MALICIOUS

PDF

84.5 KB Created: 2021-07-19 19:22:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 738c72f834fa52cda796ee373e28cfb9 SHA-1: 5e6af1d3f865cafce82c8290fe1496bae3e51b41 SHA-256: ede0dd0bb093b447abba370d97db8f1fe3a8771745266fbaddfa78a9c0600105
136 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains heuristics indicating it is a phishing lure, utilizing an external URI and a redirector. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were extracted, the presence of a redirector points towards an attempt to lead the user to a malicious site, likely for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9898

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/AnJPYMJXbyQ/square?utm_term=synonyms+of+step+by+step PDF link annotation
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60f1428d7ffd90482e38a9cd/1626423949379/hibbeler_8th_edition_solutions.pdfIn PDF document text
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ec8e5ae7718717d762d0c0/1626115674549/melody_of_troubadour_music.pdfIn PDF document text
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60ee517dfd66ff3739efc947/1626231166037/bebibejaj.pdfIn PDF document text
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60f09086cf1db23820e2587b/1626378374551/find_the_prime_factorization_of_180.pdfIn PDF document text
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60ee0bcceed6cd77ab5e276f/1626213324395/14079645201.pdfIn PDF document text
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60f027ec97dca740078f9ee8/1626351596855/27115178688.pdfIn PDF document text
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60f02164a9bc231ac1d09666/1626349924882/wet_well_operations_manual.pdfIn PDF document text
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60e7cc2d4aaab0286a8a05d7/1625803821620/tasofego.pdfIn PDF document text
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60e8d69d781e3e37a185de44/1625872029781/french_in_action_mise_en_oeuvre_answers.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_off0000e4c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4C8 10448 bytes
SHA-256: 117a50faba135a54b71e53c2ec360aab34cac0abf37171a8276ebe450dcab22c
font_01_sfnt_off0000fc45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC45 18676 bytes
SHA-256: 29307d718d1af455d8942d4b4a5ccfd8c0435f232d0d2cff12f79e2f7570cc69
font_02_sfnt_off00012c3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C3D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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