Malicious PDF — malware analysis report

Static analysis result for SHA-256 5085cdd6d0cdea66…

MALICIOUS

PDF

79.5 KB Created: 2021-07-18 10:18:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 91bbaa6046dab877c86d0366798232c2 SHA-1: 759ca859e269b10ee26864bc8936ae1e7970fe8c SHA-256: 5085cdd6d0cdea6610674b444e5ef3eb14ce941ac5515696fe3396b2a6083586
136 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains an external URI and a redirector link, identified as a lure for free downloads, which is a common phishing tactic. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were extracted, the presence of a redirector suggests an attempt to lead the user to a malicious resource, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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/~3/0YvHz_IItD0/square?utm_term=ruger+mini+14+instruction+manual PDF link annotation
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60e95ab4e51f1f218d6ba47a/1625905844397/94499420338.pdfIn PDF document text
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60e8f47219a9f87deb70e5cb/1625879666639/12023207116.pdfIn PDF document text
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e92ef36e267257943b5293/1625894643965/67234630262.pdfIn PDF document text
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60f26261668793736d2775e9/1626497633801/very_very_sexy_woman.pdfIn PDF document text
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60f1a41725a4974f36310121/1626448919693/how_to_download_books.pdfIn PDF document text
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60ee0758a9aa746350d04a58/1626212184849/at_the_airport_vocabulary_worksheets.pdfIn PDF document text
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60f08e2f214701376a3558bd/1626377775439/78325888808.pdfIn PDF document text
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ed751c0318596fdcc3a603/1626174748424/sonorixomepu.pdfIn PDF document text
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e8d3c5a15ec47e0818572a/1625871301244/73323891044.pdfIn PDF document text
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60ed92be5eed834fcc388796/1626182334347/zinaduxejewepijubonewadov.pdfIn PDF document text
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60ee4aa3aa539923b5875343/1626229411176/cosmetic_hs_code.pdfIn PDF document text
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60f3abeed68f3225905d8c3e/1626581998896/wenatujuritubuk.pdfIn PDF document text
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ee7eff7426fb5109f86f39/1626242815825/40660356695.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_off0000d277.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD277 10848 bytes
SHA-256: 31ee00b2555d928a643a55a2e13a97321b32318adbded14ca7af4f95fb0b689f
font_01_sfnt_off0000eb93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB93 17676 bytes
SHA-256: aa31b0ba0f78c34fe6393e36f2a6e827d22e055b4ba1f8a3fbb4de565ab6ed71
font_02_sfnt_off00011921.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11921 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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