Malicious PDF — malware analysis report

Static analysis result for SHA-256 4450502bd314b8c5…

MALICIOUS

PDF

193.6 KB Created: 2022-01-19 05:08:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-12
MD5: b3313be6fa26b988b800a36478ef9081 SHA-1: 974d591f891e29c15f7e72ff6d891962d76334d0 SHA-256: 4450502bd314b8c5808786e25caa213dc19b28902e0570b3ef5cbe3c517bafc1
136 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains an embedded link that functions as a redirector, leading to a phishing site. This is indicated by the 'PDF_SEO_UTM_REDIRECTOR_LINK' heuristic firing and the presence of multiple unknown URLs pointing to PDF files. The ML classifier and ClamAV detection further support the malicious nature of this file, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9478

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 http://littlepearlspublishing.in/data/eimages/file/jigujuroxipojomuzina.pdf In PDF document text
    • http://rocincorporated.com/domain.com/images/dynamic_pages/file/28713898522.pdfIn PDF document text
    • http://mellorymotors.ru/admin/ckfinder/userfiles/files/kimakugezimiwasarokalidar.pdfIn PDF document text
    • http://kiengiahung.com/userfiles/file/pepavuxofutorujexupos.pdfIn PDF document text
    • https://www.oabrn.org.br/2017/_ups/files/files/tejajobi.pdfIn PDF document text
    • https://festivaldelmaridaje.com/sgi_userfiles/userfiles/files/26505303365.pdfIn PDF document text
    • https://michaels-limo.com/wp-content/plugins/formcraft/file-upload/server/content/files/161463efb3d039---pevojeduvabulufedesuguki.pdfIn PDF document text
    • https://traveletrust.com/basefile/traveletrustcom/files/65221727579.pdfIn PDF document text
    • http://hanyangsteel.com/files/fckeditor/file/189013675461665fee6d4a0.pdfIn PDF document text
    • http://feedproxy.google.com/~r/MbOu/~3/5bhJmFgkeCE/uplcv?utm_term=lagu+barasuara+bahas+bahasaPDF link annotation
    • 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_off00029fa1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x29FA1 17236 bytes
SHA-256: d337ae4beb50b92196fa4f6a7dd1c559bf882889b625a723237eb236078ad673
font_01_sfnt_off0002cc63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2CC63 16416 bytes
SHA-256: cfa2c3fbce80cc5607e01af033b793d17c57c214fb1d96e845eedea48cccd336
font_02_sfnt_off0002e306.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E306 9992 bytes
SHA-256: 946c61189864a1e9d882ab69f2356e0bc48c59bb3c9dde03f171f553560d2ca0

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