Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a24b6068acd4ddc…

MALICIOUS

PDF

43.5 KB Created: 2020-10-31 16:20:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-11
MD5: 3c261542d7c74b837355242dd98cec13 SHA-1: e3a37ca4a6e7784c16af9b0eeed7f31e17d3ef85 SHA-256: 7a24b6068acd4ddc2451439cf934c02371605d750341afef11290bfe74319e17
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://cctraff.ru/aws?keyword=qubool+hai+8th+may+2015 In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366965/normal_5f8c889f58328.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417675/normal_5f97708613a3d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390092/normal_5f9182d53dc51.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417664/normal_5f98982c457ee.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/1/0497/1964/0225/files/textual_evidence_worksheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/05b9fb19-4c01-4c9c-a28d-b2945f4e300f/50648668941.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/819a10c3-a39e-45d9-9b60-f263f6b07e5e/zitatinevaluzaro.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1688/0281/files/rectangle_word_problems.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6051/7274/files/91180764667.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1603dba1-8b88-47dd-9d5f-25385064b0c9/the_office_season_1_episode_2_google_drive.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4928/6817/files/monument_mountain_regional_high_school.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/891b6da3-fca0-4d70-b660-466075605330/38184023052.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0268/7759/1744/files/bepazofesawu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c1be8b4a-d9ed-46a7-bec0-9ec3bcf9eed3/vyond_account_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6302f58b-2b55-400d-8e96-b6ad0ec23b32/gogozogoseput.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_off00006c3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C3E 5596 bytes
SHA-256: d949e5dc9e356024600a1d31b69083cffb0ef2291c5b10276f838554f1a7bc2d
font_01_sfnt_off00007f3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F3A 10012 bytes
SHA-256: abef8b3eaef9a122090e7465497e76ea052e2c598ef50a4e82ae0a8459a36b25

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