Malicious PDF — malware analysis report

Static analysis result for SHA-256 19bae7c3bf55c35c…

MALICIOUS

PDF

61.5 KB Created: 2020-08-26 15:05:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 50b2af595689cb1f687f920afad1aa1c SHA-1: 2dbed5ac163c9dab0f0f2e46f9a1465496f20f27 SHA-256: 19bae7c3bf55c35cc57da5bad3f3046d9ed4bde142c6c495301f202e258e36a9
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=dinamani+tamil+news+paper+today In PDF document text
    • http://files.symphonyofhawaiianbirds.com/uploads/1/3/1/3/131381658/6440541.pdfIn PDF document text
    • http://files.zeldaandbramble.com/uploads/1/3/0/8/130874122/446679.pdfIn PDF document text
    • http://files.columbusmichael.org/uploads/1/3/1/6/131636890/fetagamilut-mowefib-zufajudaz.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/1/0429/2971/7407/files/81311949064.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3985/7572/files/tardiness_theory.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7674/7413/files/certificado_de_preparatoria.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1811/6510/files/dorirasiwitewulogexixajip.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8370/1151/files/font_averta_demo_pe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7245/3797/files/82533619137.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8158/1209/files/gofaw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5042/5753/files/62329531182.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2641/4748/files/sejoj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7790/1219/files/formazione_del_catanzaro_calcio_del_1984.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5729/9097/files/excel_2020_vlookup_tutorial.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7303/4657/files/hmrc_intermediary_report_deadlines.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006a5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A5F 12460 bytes
SHA-256: 2496186a28ee4d37fb9d5c7120ab2116d54a46f476d8cdb169e378fbc0f6eb4a
font_01_sfnt_off000092b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x92B7 5296 bytes
SHA-256: 35427a08051c64dbba6a4b67701e5f0924fb407d6e01ce55b9dcf79c11a43ef3
font_02_sfnt_off0000a4b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA4B2 15100 bytes
SHA-256: 4279b26f8ea24f4e936eb193ff2dcd80faec1fa0259d02d1e2ca339aaabf6366
font_03_sfnt_off0000d389.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD389 16092 bytes
SHA-256: 9af6fc3bf9d751f70540aea0fa47faa159a3604992cda23d2adcda3ffc5346b2

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