Malicious PDF — malware analysis report

Static analysis result for SHA-256 b7e16aef3d906207…

MALICIOUS

PDF

49.5 KB Created: 2020-11-06 21:39:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: d06bb6bbceefa551745d2cc46f4e91ce SHA-1: 49c96eb4b1be9fd6c118ea73920056145f92a0e5 SHA-256: b7e16aef3d906207e79eeaed9affb3ba38e08fb45af9214d8178cd0816917a3e
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://traffine.ru/123?keyword=pie+launcher+prime+key+apk In PDF document text
    • https://nikuwexipamojag.weebly.com/uploads/1/3/0/8/130813731/299604db954.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385863/normal_5f9ebb3811a2f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386852/normal_5f8d7097a9ee8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389090/normal_5f90811e0b0cd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393759/normal_5f960712ae17e.pdfIn PDF document text
    • https://kubupukadumu.weebly.com/uploads/1/3/1/3/131382740/tisodavumino.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366024/normal_5f870ed24ff13.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378164/normal_5f8fe6efed658.pdfIn PDF document text
    • https://xunowarusaki.weebly.com/uploads/1/3/4/3/134371630/ad956af2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374847/normal_5f8e1f5a5ab8a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/7caf176c-d070-4f3f-96a6-72291fec32f1/wonopusebofi.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_off00005eb4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5EB4 5160 bytes
SHA-256: 48c03a7dbc2a4b29427d466e58211aa7a50ba7ef911ce5aba5b7e0d02c3c3afe
font_01_sfnt_off00007015.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7015 2140 bytes
SHA-256: 3eadf3ff1ae85f7a2dd8be852d633ca148c1d24200a16cbd4325889adc5789c4
font_02_sfnt_off000079ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x79EF 11816 bytes
SHA-256: 6b5e69367d08d423dafd96945934c8d36244871c1b7fb436ab545ec385f15e8e
font_03_sfnt_off0000a0f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA0F9 16896 bytes
SHA-256: acf1f924baa3b1945789cb9ca6359303139b8490b16b2eda8e08382fc299196b

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