Malicious PDF — malware analysis report

Static analysis result for SHA-256 490b556a6cc26df6…

MALICIOUS

PDF

158.1 KB Created: 2021-07-13 00:03:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: cd95714ced1d8c9d378b9e963ba801b4 SHA-1: c98920ef618344e0f483fbd8e55c40ddf3661376 SHA-256: 490b556a6cc26df67f0a09c1dc703669084656eb5a0060f31b664de826e4d0b1
76 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a high-severity heuristic firing for a redirector link, specifically identified as an 'Image lure linking to an SEO redirector (free-download phishing)'. The primary URL identified, 'https://feedproxy.google.com/~r/sq/ugae/~3/9xivtwLAy4k/square?utm_term=force+multiplied+by+distance+equals', is used to obscure the true destination. While no scripts were explicitly extracted, the PDF structure and the nature of the redirector suggest a phishing or malware delivery attempt, aligning with Spearphishing Attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9938

Heuristics 4

  • 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/~3/9xivtwLAy4k/square?utm_term=force+multiplied+by+distance+equals PDF link annotation
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60e8a92a37faa2302622cbd4/1625860394123/ast_and_alp.pdfIn PDF document text
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60e8acf8f98f4246de402532/1625861368951/childrens_would_you_rather.pdfIn PDF document text
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60ec9ab245711547b6a8705f/1626118834282/59629186683.pdfIn PDF document text
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ec783afe047727940a6cc5/1626110010098/stock_and_debtor_system_hire_purchase.pdfIn PDF document text
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60ecadc2ea6ac669068445b5/1626123715131/bavugu.pdfIn PDF document text
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e92ef36e267257943b5293/1625894643965/67234630262.pdfIn PDF document text
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e7cde9d0799e4214bff4ff/1625804265160/70699145828.pdfIn PDF document text
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60ec8e8d704a383bbeda3f80/1626115725318/lipurafekak.pdfIn PDF document text
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60e813428ad60325f0c88118/1625822019083/suv_and_crossovers.pdfIn PDF document text
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e80dcdbab06216133a51d7/1625820621413/between_two_ferns_hillary_clinton.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_off00020d37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x20D37 17164 bytes
SHA-256: b82e6eab80ccd4fe77973b0d5726e90e2458ec2bcf260a24765121d37d51384f
font_01_sfnt_off00023a10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x23A10 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00025227.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x25227 11152 bytes
SHA-256: dd9c16886e58c2340db5ff24138297ef25ae358d6c20c0161f0f487d40b8cc47

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