Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed8742022973c1fd…

MALICIOUS

PDF

177.3 KB Created: 2021-07-16 17:18:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-04
MD5: e76d97aa5799ecdeaa2bcab111917544 SHA-1: e3518218e9a5a9d9c13929b35e82a1693a7d55bc SHA-256: ed8742022973c1fd51e369194003045d00a2509de8b2474ea9f3848e0436f4ef
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains a critical heuristic firing for a 'Recovery secret / private key request', indicating a phishing attempt. It also includes a high-severity heuristic for an 'Image lure linking to an SEO redirector (free-download phishing)'. The embedded URLs, while some are marked benign, point towards a phishing campaign aiming to trick users into revealing sensitive information under the guise of providing a solution manual.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4570

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • 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/razvivatel/yapz/~3/IdU8rIDf9lQ/square?utm_term=computer+networks+5th+edition+solution+manual PDF link annotation
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e8e0ecc91b61347ea03b9d/1625874669057/92524191552.pdfIn PDF document text
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60ee63858685745b7d176442/1626235781452/sijubo.pdfIn PDF document text
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60ee24c8eed6cd77ab60435d/1626219720336/kiketinonor.pdfIn PDF document text
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60f0a56e2d689d6a7ff2704f/1626383726785/text_italic_in_css.pdfIn PDF document text
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60ec80f14a8bde38c344946f/1626112241574/44095974692.pdfIn PDF document text
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e843689a03552a3d3835c6/1625834344862/nanisir.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_off00025299.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x25299 19244 bytes
SHA-256: c8488b1702e91e5f9d0c21d8541b0d7ec0fd8d599997702222d8930297174896
font_01_sfnt_off0002867b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2867B 11100 bytes
SHA-256: 71388accdb0bff8e2ed54f118d07df7cefa3bf6100418e8b2b75d988a901c534
font_02_sfnt_off0002a04a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2A04A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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