Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2c1baf2ba6969ad…

MALICIOUS

PDF

41.0 KB Created: 2020-11-06 08:06:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 26fb099f4c7dc90953c0231dd4a3dfce SHA-1: a6e12fce1fcd0b7834207497f5ec51190cebfed3 SHA-256: c2c1baf2ba6969ad48d39cf9559e2dd83942e429ac93e860808a2354a5e6e14f
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://traffmen.ru/123?keyword=teddy+roosevelt+presidency+years In PDF document text
    • https://cdn-cms.f-static.net/uploads/4367271/normal_5fa33d9aeca0b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411923/normal_5f95d71e50ee5.pdfIn PDF document text
    • https://sixodajumam.weebly.com/uploads/1/3/4/3/134311071/jevewaratilunoxoxep.pdfIn PDF document text
    • https://vawotitalu.weebly.com/uploads/1/3/2/7/132710714/fff4608ac61.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/89fa164e-4314-4efc-a201-f3588dcb36f7/sodanorusap.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/83404776-399f-4bae-a2ad-272af19e6d7f/fermentation_lab_report_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ea1bd637-1372-4e31-878f-a4f31080b485/kizagenogenuxobosemik.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ddfc32fe-2062-4a01-8095-7f8b3acbef0a/niludejofotamu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6cce3dbc-c8f4-4393-9765-ce4feea0a05e/zurafikafe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3f483365-d4fd-4acb-8a8b-98fb2dba3c03/rufajoxawafatuwigudi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c5001aed-7309-411b-9626-14a167e1a5f8/vebozunajarigul.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/faef34fb-2886-4422-a525-1e50115d2e99/27929904326.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9f1ff2bb-5933-44a1-9074-647a24e5223e/tagalomusujotigadogidiki.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_off000062e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62E4 5176 bytes
SHA-256: d4a69a2c4267abf42355982e969d7e33652835a2e87d23c0c900a36e4d723835
font_01_sfnt_off0000749d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x749D 10208 bytes
SHA-256: 2a6c21b498d41b7ed8c3e5886ac884746382d95c4bbce3219abca6acde3e54d9

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