Malicious PDF — malware analysis report

Static analysis result for SHA-256 daf152450aa891b0…

MALICIOUS

PDF

149.9 KB Created: 2021-07-14 08:03:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: b9107a3ade16252730ede8f77c56e2ca SHA-1: 910721ee989458e71b948c181bf5317e066688a6 SHA-256: daf152450aa891b0e34d14739fc57390bfc81352f0bee1404149a64609e666c9
136 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by multiple heuristics, including ML classification and ClamAV, as malicious and phishing-related. The 'PDF_SEO_UTM_REDIRECTOR_LINK' heuristic indicates an image lure leading to an SEO redirector, suggesting a phishing attempt. The embedded URL, while classified as benign, is part of a chain that ultimately leads to a suspected phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9503

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/k6oGaauGqGM/square?utm_term=spbo+live+score+results+today PDF link annotation
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60e8ff7e19a9f87deb716a89/1625882494676/91284904381.pdfIn PDF document text
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60ee46f4588fb56695153b62/1626228468733/22603787768.pdfIn PDF document text
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60ec8244a1f8f93f64abab20/1626112580880/gewufoxusowenuber.pdfIn PDF document text
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e8e0f458c6623f037e9783/1625874676243/fusefemimawugujuwas.pdfIn PDF document text
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ec851a760c9e2bcf43206c/1626113306554/pulewidejidisalalomuruj.pdfIn PDF document text
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60ec8bb767baa26076bca37a/1626114999309/narcissist_traits_in_a_relationship.pdfIn PDF document text
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60e835afbab06216133c0d73/1625830831062/dishonored_2_artist.pdfIn PDF document text
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60ee352b6d75c50a5d433a1c/1626223915417/33544189430.pdfIn PDF document text
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60eda02e2d9f403b5211cf5e/1626185774352/dokoduxowabewifepimap.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

Related samples 7

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_off0001ecb0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1ECB0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000204c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x204C7 10900 bytes
SHA-256: bf686cbc0579cecbea934a87c923a7eaa2f047f096e4a8e672ae0975ff4fd1cb
font_02_sfnt_off00021dea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x21DEA 17288 bytes
SHA-256: ee8e8ef30c2bb4ddc3c543382b7a3b012e971d06857bdb200cbc2109dfa25341

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