Malicious PDF — malware analysis report

Static analysis result for SHA-256 52770eb47cf9019f…

MALICIOUS

PDF

48.0 KB Created: 2020-11-08 04:02:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: d0fc7db09b0a8f65c559f67b3061c0dc SHA-1: 1a6541d81e08fc3e70374ac75a01ad0dd32ad2ba SHA-256: 52770eb47cf9019fa5214ee500525a0fcc386d84eb303d19cfb1f2299088acb2
76 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF document contains a lure related to 'words that start with wa' and employs a redirector to a phishing site. The ML classifier strongly indicates maliciousness, and the embedded URL is flagged as a high-risk SEO redirector for phishing. While no scripts were directly extracted, the PDF structure and embedded URI suggest an attempt to trick the user into visiting a malicious URL, likely for credential harvesting or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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://trafffe.ru/123?keyword=words+that+start+with+wa PDF link annotation
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/4549ee1f-cba5-4e76-a773-1325d8a001d1/60945454827.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/82f6495e-da3c-491b-aadb-15392e6d4d1a/58458570078.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1627804c-8303-488c-bf52-1762ae81ad3c/xosufufezobewapeso.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8b8d5cc4-2c05-470e-a7a4-a89a6335ea22/the_queer_art_of_failure.pdfIn PDF document text
    • https://s3.amazonaws.com/wizuluworafid/apple_worm_unblocked_games.pdfIn PDF document text
    • https://s3.amazonaws.com/purawuma/98887800074.pdfIn PDF document text
    • https://kuwibanaxar.files.wordpress.com/2020/11/98036189897.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/50b25226-b0fe-414c-bd3f-9bf65c4dd657/58086085150.pdfIn PDF document text
    • https://s3.amazonaws.com/tabobujimo/catalogo_ikea_2010_espaa.pdfIn PDF document text
    • https://mofuvotixes.files.wordpress.com/2020/11/absite_surgery_review_free.pdfIn PDF document text
    • https://zojemadej.files.wordpress.com/2020/11/73587489466.pdfIn PDF document text
    • https://s3.amazonaws.com/bubeto/star_ruler_2_guide.pdfIn PDF document text
    • https://vikexura.files.wordpress.com/2020/11/78918544186.pdfIn PDF document text
    • https://gaduroso.files.wordpress.com/2020/11/75780125128.pdfIn PDF document text
    • https://s3.amazonaws.com/wunojipu/sasojekubaziratoxedop.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000065d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65D2 2888 bytes
SHA-256: 002800a4821813a929c899fd6bd0ba57a8f832249628ea1c7521c704aaa157d4
font_01_sfnt_off00007016.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7016 4988 bytes
SHA-256: 8f6171967a0da53c2cdfd0ed723b305cf0d8627ff878ff4811e3e2515d690b00
font_02_sfnt_off00008118.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8118 16260 bytes
SHA-256: 152ea977ef0f61327d8b890e49766fdffe589e3320b6e81f11694bc2cc28288b