Malicious PDF — malware analysis report

Static analysis result for SHA-256 f342af7f2ed2f5c7…

MALICIOUS

PDF

42.4 KB Created: 2020-11-04 05:02:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-03-01
MD5: 2f3f47f3e4e68953c4ffc2ebb2e01927 SHA-1: 18591f12bdbcf8766f96d6937674a3e8e58865ee SHA-256: f342af7f2ed2f5c7d2f4f769d746011224b90eb8030a8a66d6634382dbc9c346
134 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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/123?keyword=smartstandard+barn+door+kit In PDF document text
    • https://cdn-cms.f-static.net/uploads/4365598/normal_5f870e0778107.pdfIn PDF document text
    • https://dodawuwaxa.weebly.com/uploads/1/3/4/3/134305805/sikunafinem.pdfIn PDF document text
    • https://kavanezeso.weebly.com/uploads/1/3/4/4/134477356/dowupewalafozisupuju.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367000/normal_5f8af4f51fc99.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384150/normal_5f93beb64c2c8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372719/normal_5f8aa02690c0e.pdfIn PDF document text
    • https://xojerajap.weebly.com/uploads/1/3/1/3/131384359/9611648.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410004/normal_5fa06d6954d05.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/robumuduluwise/yellowfang_and_fireheart.pdfIn PDF document text
    • https://s3.amazonaws.com/dinilederu/zatuwademibovidawud.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxenipup/true_wireless_earbuds_otium_soar_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/matogapibelifiv/tudekusuzabutodugo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a319e639-78e7-4ac5-9565-38a2586c856f/38744054263.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d87a8c4-bc3a-40be-b72b-4ef0b2bc482f/supifurezevuvezitex.pdfIn PDF document text
    • https://s3.amazonaws.com/napisakaluja/36685752479.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006641.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6641 5244 bytes
SHA-256: d61db2edc3466d8a50b6d47a44971b04182e549ec4ad63dfddbb5cdf62239209
font_01_sfnt_off000077f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x77F7 11092 bytes
SHA-256: 40bf299e42db61ce47544606970e0de73a1eab9b90fd46c282b50022984695b1