Malicious PDF — malware analysis report

Static analysis result for SHA-256 b28b4e7b352c7465…

MALICIOUS

PDF

60.1 KB Created: 2020-10-26 01:25:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: fd827ea898f598bdadb02cc64072a92a SHA-1: e7c50da0fd0b6685b5fe35719c410b0d7206f767 SHA-256: b28b4e7b352c746513d5fadf42963505311b78ed473cade8a359d6b5eb00e134
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.me/123?keyword=xtreme+hd+dashboard+camera+manual In PDF document text
    • https://gofolonuk.weebly.com/uploads/1/3/4/3/134313710/2771971.pdfIn PDF document text
    • https://sixapinipuso.weebly.com/uploads/1/3/1/3/131384402/a8f7e846b29cbc.pdfIn PDF document text
    • https://tavumake.weebly.com/uploads/1/3/2/7/132740551/fafajaxunej_fifuxosuw_jilapowebemibi_rabadu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392442/normal_5f91725b3256c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381531/normal_5f8fd426bfc1f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369923/normal_5f8ec3550af84.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381962/normal_5f955489da2b9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383561/normal_5f931a7094cb2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380876/normal_5f8f3a21b9a8a.pdfIn PDF document text
    • https://sakuvajavabese.weebly.com/uploads/1/3/1/3/131383602/mewutijufebosura.pdfIn PDF document text
    • https://dojulukasinu.weebly.com/uploads/1/3/0/7/130776790/bivapinoj.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off000092f0.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off000092f0.bin)
    • http://www.daltonmaag.com/In extracted file (font_03_sfnt_off0000d48d.bin)
    • https://uploads.strikinglycdn.com/files/02a8d424-2773-49a8-a46f-7ada3ba8facb/vevemapedadusireluzuris.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b9cdfc03-27c2-4990-a09c-4cf1820f6888/nozijilibiguzapewefe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/70e5d15d-3bc3-4e13-b7e6-657c5965ebf2/69664941124.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/54f04c54-23d6-4bbe-8e03-e6098b168c9a/22649663448.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c025db36-6a02-45ca-aa73-38fea5aa4725/xadosawojubipedigaf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9702c9c9-43c3-40ff-9742-8c76e8d63ac9/jai_ho_mp3_song_download_bestwap.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e27dc0ef-f1fb-401d-9764-9f6e584b4869/jupavinala.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 extracted file (font_00_sfnt_off000092f0.bin)
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn extracted file (font_01_sfnt_off0000a421.bin)
    • http://www.gnu.org/copyleft/gpl.htmRegularIn extracted file (font_01_sfnt_off0000a421.bin)

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000092f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x92F0 5128 bytes
SHA-256: b6b31cb835b7d29ce79bec41578d338de46e4240be56fe7beb938a027ca2709b
font_01_sfnt_off0000a421.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA421 3720 bytes
SHA-256: 6539b129c5cd894636dc8f40f53a156c00c8f46378ab4f137c96d687a1cff6ed
font_02_sfnt_off0000af84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAF84 10892 bytes
SHA-256: 4e0ff997b8024fdbbd16e6e011809d24c92def5d04eeffc02fd912e40ea006f3
font_03_sfnt_off0000d48d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD48D 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e