Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a8730b6eefe81c6…

MALICIOUS

PDF

66.4 KB Created: 2020-08-26 06:05:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: ae40f23eada5cfa8d59312e7ab52d01f SHA-1: ffffada138b0ebf26a1b59546292ffa6eb8bb884 SHA-256: 0a8730b6eefe81c62abb75e097e2d67edfa8e9dfd2503192c7846216bca814f1
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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.
  • 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://ttraff.cc/pify?keyword=le+type+sp%25C3%25A9cial+%2528%2540guyspeciall+instag In PDF document text
    • http://joxonid.byptrampolines.com/uploads/1/3/1/3/131379730/6427354.pdfIn PDF document text
    • http://selenujam.asafcircus.com/uploads/1/3/1/4/131438019/bafifig.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3088/8094/files/rationalisme_appliqu_bachelard.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0454/5685/1094/files/como_cerrar_sesion_gmail_en_celular_android.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0445/2246/files/ratewisosadixujenidibifo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0466/5924/0101/files/rewumebedisupudelixe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4642/8062/files/zokemazazubebipibuf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0463/8962/4987/files/bsc_nursing_syllabus_mgr_university.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7881/1797/files/libros_de_ansiedad_en_nios.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0448/0643/9078/files/kazaruzomikaf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0446/1517/2259/files/morfologi_columba_livia_journal.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8804/4442/files/tuxupivaripilafetizuwux.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9850/4354/files/67319339202.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
    • 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_off0000aa49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAA49 5600 bytes
SHA-256: 8b95a8aca3b1ecb76c8258ea9080fdae5f9599b115a0aff319ece0e654707c5c
font_01_sfnt_off0000bd47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBD47 11268 bytes
SHA-256: 6c1bf8cf7a7f859b1b463f68cfbadcdf749aff9f52cdc0454fcb7a72fcd38351
font_02_sfnt_off0000e3b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3B8 16576 bytes
SHA-256: b11f9a3232ff371f99ca0b3a0364e3291d07f405e8d99deb7572965234ba3c18

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