Malicious PDF — malware analysis report

Static analysis result for SHA-256 8de8f06b33a2de14…

MALICIOUS

PDF

134.5 KB Created: 2021-07-12 21:46:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: fd635f0357c6fdaa93ab0675c11b2d5f SHA-1: 829e3642d965a76c8a4ee2b54618170261778393 SHA-256: 8de8f06b33a2de148504868e540359d3c6679ec9653ef1b0d7065f7ba558debc
136 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing attempt. The PDF contains an external URI that functions as an SEO redirector, likely leading to a phishing page. While no scripts were explicitly extracted, the PDF structure and heuristic firings suggest it's designed to lure users into clicking malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5897

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/iXsW93xxTQA/square?utm_term=inflation+caused+by+an+increase+in+aggregate+spending+is+referred+to+as PDF link annotation
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60e8fc890cbdad4d35046f7b/1625881737879/69966514778.pdfIn PDF document text
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60e7cad086d8930991a57b4b/1625803472170/hypertension_in_nephritic_syndrome.pdfIn PDF document text
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60ec7b0d8bb04542cee39bc0/1626110733707/botunatupesivirimet.pdfIn PDF document text
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60ec83696ad76c0974904039/1626112873354/buwud.pdfIn PDF document text
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e7d97a4b964f05b8483738/1625807226091/74806674532.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_off0001a9f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A9F4 11100 bytes
SHA-256: d53ab90ed55cb7793b7a50592921013870f7a58763bae95c975410726b11d736
font_01_sfnt_off0001c38b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C38B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001db9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1DB9D 18824 bytes
SHA-256: 6a83ee9cdd27b2bcd63f0534cb215200edd542ca6a676913a5f32af4bf572b84

Open this report in the interactive analyzer, or submit your own file for analysis.