Malicious PDF — malware analysis report

Static analysis result for SHA-256 c28ab3c30038db75…

MALICIOUS

PDF

47.6 KB Created: 2020-11-08 17:58:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-11
MD5: c43ae9ac6d6a223956826595c705da29 SHA-1: dfa8a38d4deea0a9b4f601ea3f6ba965e5a06af6 SHA-256: c28ab3c30038db75bcc60328e6538e4253937799e82d4d7742435ce65d91ddf7
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=last+man+standing+football+pool+template In PDF document text
    • https://guwomenod.weebly.com/uploads/1/3/0/8/130873843/nukunuraki.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388293/normal_5f97eb54448ef.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443821/normal_5fa75329cf73d.pdfIn PDF document text
    • https://sazagirisama.weebly.com/uploads/1/3/4/5/134585928/ac30ae.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422137/normal_5f9bfe15a0783.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450870/normal_5fa19edc4128c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/80457026406.pdfIn PDF document text
    • https://s3.amazonaws.com/visagogijulep/the_setting_of_to_kill_a_mockingbird.pdfIn PDF document text
    • https://s3.amazonaws.com/bejokazemur/libilobufuluvivevoduwi.pdfIn PDF document text
    • https://s3.amazonaws.com/bofake/tudiberejavipuvenajatedip.pdfIn PDF document text
    • https://s3.amazonaws.com/napejaxosinages/64292022152.pdfIn PDF document text
    • https://s3.amazonaws.com/jaburirarov/93066574292.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006b15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B15 5132 bytes
SHA-256: c79b7b65aa65de995f714aa3d5fffe96ddf961cffca5782c1808381f2ca5b2de
font_01_sfnt_off00007c74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C74 11404 bytes
SHA-256: 6e2bdf46a99102bfaf5336112cae743bd4d42088577102aa244144fc7604179b
font_02_sfnt_off0000a351.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA351 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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