Malicious PDF — malware analysis report

Static analysis result for SHA-256 98ef130c4d66c2d5…

MALICIOUS

PDF

75.1 KB Created: 2021-07-18 02:00:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: eec15bdd69d7053eefe9c353e141e1ac SHA-1: 07adabc0285f25bfb3f9a42ffcd2ea2d79d4637e SHA-256: 98ef130c4d66c2d5b75b63d12b9a3c5b621e05237d1284960b2d6c343c329128
136 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as a phishing trojan by ClamAV and flagged by an ML classifier. A high-severity heuristic identified an image lure linking to an SEO redirector, suggesting a phishing attempt disguised as a free download. The embedded URL points to a Google feedproxy, which in turn redirects to a Squarespace domain, likely part of a phishing chain.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7056

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/W5vEtEh6t-A/square?utm_term=how+to+hyperlink+multiple+pdf+files+in+excel PDF link annotation
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60f234bc1ad9bf1c32a872be/1626485948368/a_disadvantage_of_sexual_reproduction_is_that.pdfIn PDF document text
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60f2f19a9c7c9f0ea9957c96/1626534298928/how_to_convert_a_scanned_document_to_a.pdfIn PDF document text
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60f2431122602c08cae56a60/1626489618051/verbals_and_verbal_phrases_answer_key.pdfIn PDF document text
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60f05db07c351464f954f9c5/1626365360572/two_is_better_than_one_lyrics.pdfIn PDF document text
    • https://community.spiceworks.com/topic/2149222-excel-links-problem-points-to-old-In 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 1

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_off0000c251.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC251 16808 bytes
SHA-256: f2d6c0e4263938fbe4a26584a5e52b2e78d9c808af615c3626f2b252b367f729
font_01_sfnt_off0000ee3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE3A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010651.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10651 11208 bytes
SHA-256: 828e13c6e0d29ac3feb40235a8d442c75227f39c867247e1731166ddf3ab849f

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