Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a741332c9ca19bd…

MALICIOUS

PDF

51.7 KB Created: 2020-10-21 12:14:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 3726a37e460cad38192e580e9c3c0afc SHA-1: b70143459b9647b5d98d1d287e59e2630043edac SHA-256: 6a741332c9ca19bda9689b14439e315e90c982adad6056ecd016a73b7db90da4
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://ttraff.me/pify?keyword=hard+reset+android+samsung+s7 In PDF document text
    • https://cdn-cms.f-static.net/uploads/4369311/normal_5f87fcae2eee1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388048/normal_5f8d0e79a2023.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387412/normal_5f8ce2b0ef530.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366366/normal_5f8b832ec5c07.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367312/normal_5f88c87258f78.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385231/normal_5f8c70fc97358.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369915/normal_5f89459a3c2a2.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/589e7d15-5619-4e99-9334-71aae219643c/74524242339.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1053e5a8-2ebf-48da-ba40-6abe748ad52f/82699094079.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d383fd43-1d9e-4f90-b3fb-4eaca0f49ba2/25491559009.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f384b7c1-688b-4461-a9c7-b8c6e6246f20/nowetugadinavizotudotuma.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0504/3316/3451/files/javapresse_manual_coffee_grinder_uk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/9929/4363/files/zejajeg.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9491/5738/files/wegipamisurovugel.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0493/6597/5199/files/67014723232.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/0315/3048/files/66603485785.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8381/5325/files/faginijapededufarikosali.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2707/0104/files/mimepelabowuwej.pdfIn PDF document text
    • https://s3.amazonaws.com/zetare/59738177212.pdfIn PDF document text
    • https://s3.amazonaws.com/tetazino/bejisojobalutefewewa.pdfIn PDF document text
    • https://s3.amazonaws.com/memul/xosomefudedasa.pdfIn PDF document text
    • https://s3.amazonaws.com/mijedusovineti/dobefekufeligena.pdfIn PDF document text
    • https://s3.amazonaws.com/sugaguxagu/musibanu.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_off00008c54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C54 5152 bytes
SHA-256: 9442d424209306d6497b3ac6d219014d0c099af1c17cb0aa2d87da05475cee8e
font_01_sfnt_off00009dc8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9DC8 10316 bytes
SHA-256: e0d53a695f90237a6f83a007d0149bf3c4d65fe519dabad370e618a1cd92acef