Malicious PDF — malware analysis report

Static analysis result for SHA-256 56c50454613e9302…

MALICIOUS

PDF

75.7 KB Created: 2021-07-17 04:03:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 4a4e0f0203f859405ec538057cea141b SHA-1: fc539ac0e7471971d8982a4e7b906c85b46c1104 SHA-256: 56c50454613e930257016f65de42f9e0989f6ea13543796c4cc1b731d05f9691
136 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by multiple heuristics, including a high-severity rule indicating an image lure linked to an SEO redirector for free-download phishing. The ML classifier and ClamAV also strongly indicated maliciousness. While no scripts were extracted, the PDF structure and heuristics point towards a phishing attempt using a redirector URL to a potentially malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

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/razvivatel/yapz/~3/v-xubMviL4Y/square?utm_term=soda+pure+substance+or+mixture PDF link annotation
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60ed93f850566b3f86653994/1626182649059/viva_questions_for_c_programming_lab_with_answers.pdfIn PDF document text
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60ed2554c2b47a6141a01b6f/1626154324188/95809575034.pdfIn PDF document text
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60ec7ea8f89f8e700bf6e2ea/1626111656738/82561452973.pdfIn PDF document text
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60ed04a10124a666ff3f0cad/1626145953361/things_that_rhyme_with_itch.pdfIn PDF document text
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60f006113a4e3014a1c322ee/1626342930163/72929483849.pdfIn PDF document text
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60ecac9be4ca3800a11bbc54/1626123419314/70904709643.pdfIn PDF document text
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60f212fadb752c5e499e885c/1626477306410/44821574640.pdfIn PDF document text
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60edaea2c0b9b61b5976707e/1626189474732/vokubov.pdfIn PDF document text
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60e8c663810a01599a4327bc/1625867875154/the_principles_of_banking.pdfIn PDF document text
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60f10a17ff43f8054450cd42/1626409496073/introduction_slide_template.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 5

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_off0000c67a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC67A 11048 bytes
SHA-256: f8a5648d7304a1f0d8309a5b29e2da9a7686e0002175cc54849170b23f7343f7
font_01_sfnt_off0000dff0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFF0 16388 bytes
SHA-256: b29a75184a2c64634fc2643729f126776e6ed96eb32e514ad22945fd3636cfbb
font_02_sfnt_off00010a98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A98 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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