Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa1c89ec802c904c…

MALICIOUS

PDF

86.1 KB Created: 2021-07-14 06:37:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-04
MD5: 6afc487b5a7a5c7b4665f7d7a7458f6e SHA-1: bc7af0ccc7c3052bfefc93398131699b186c13c6 SHA-256: fa1c89ec802c904c9ea97501be957a08c91026fdcecf3e5244fc2064ec2a7c4d
76 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains an embedded URI pointing to a Google Feedproxy URL, which in turn redirects to a Squarespace hosted PDF. While the URLs themselves are currently classified as benign, the presence of an external link within a PDF, coupled with a high ML classifier score, suggests a potential phishing or social engineering attempt. No scripts were extracted, limiting further analysis of the document's behavior.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6304

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/J-SxIuB37Ms/square?utm_term=mole+concept+based+questions PDF link annotation
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60ecad2044349d7bb0705a3b/1626123552858/two_storey_house_building_cost.pdfIn PDF document text
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60e95d0f19a9f87deb749c89/1625906447154/dry_gallons_to_cubic_yards.pdfIn PDF document text
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60e7a79fbab06216133575c9/1625794463175/dizziness_that_comes_and_goes.pdfIn PDF document text
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60e8036efdc75e32ab092d03/1625817966821/xopolozomovuwaxotozoto.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_off0000e862.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE862 18788 bytes
SHA-256: 94dca730870540c501019b2e39d2932511d6970ac72c84c6d72fa85abcf4fb9e
font_01_sfnt_off00011aba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11ABA 10784 bytes
SHA-256: d0a3dae3a1683a933ecaed9232ee4386c361d4ad8de2525c8d24c4f5b79c0899
font_02_sfnt_off00013339.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13339 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1