Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f2e901e52349803…

MALICIOUS

PDF

39.0 KB Created: 2020-10-30 19:48:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: 940b0f05df1ffbf99617b65353526ec6 SHA-1: 5fb5e0087f0e67917aab22e901c4fc261d9a0802 SHA-256: 1f2e901e52349803837005e83662bfb588535fa018bb9e3c7682a98a7dde3f96
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=unblocked+games+robot+wants+fishy In PDF document text
    • https://rijizego.weebly.com/uploads/1/3/0/7/130776487/takijonekaleku-wububoj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368249/normal_5f8f9b4625e3f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374178/normal_5f945beb7a7d9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415937/normal_5f985cf7a536a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401697/normal_5f983ae138956.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413242/normal_5f977ca6df853.pdfIn PDF document text
    • https://bijifejutumaxob.weebly.com/uploads/1/3/1/3/131381781/7244718.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377902/normal_5f9a83ac93f18.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414167/normal_5f9617e59b620.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/1/0506/9380/0115/files/74485715732.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/7511/1586/files/use_gyroscope_android_unity.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0494/2230/3399/files/zusafutumeboxegasemozogu.pdfIn PDF document text
    • https://s3.amazonaws.com/nuxulikiwab/23553223674.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/3831/3128/files/epidemiology_an_introduction_rothman_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6412/1757/files/11309521710.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/1020/2013/files/ndlm_hand_book_download.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_off000057cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x57CC 5824 bytes
SHA-256: b66022f488694ff03d8d562a853c1aef86249a4eca157fb48874933025d1cae6
font_01_sfnt_off00006b8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B8D 10296 bytes
SHA-256: e89e9c321c482c763c7d8f2998f70c357dc3f58c10fac1022c3a62995ab65544