Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac956ea0e5da41ec…

MALICIOUS

PDF

41.1 KB Created: 2020-11-09 13:18:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-11
MD5: 281c994814a964749918de80a4bc972e SHA-1: bae93ad232321ff4451700bcdd4cf18123d2b5d6 SHA-256: ac956ea0e5da41ec4ae585cc9cfe809a3e7058188b9768b4de1714f8eab7c359
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://traffine.ru/aws?keyword=super+hexagon+unblocked In PDF document text
    • https://nikokabiliru.weebly.com/uploads/1/3/1/4/131409463/1660a45b3e6d.pdfIn PDF document text
    • https://boseveju.weebly.com/uploads/1/3/4/5/134595203/7bbb83c1fcb2.pdfIn PDF document text
    • https://lozukiwilef.weebly.com/uploads/1/3/4/6/134644014/1827f9684fd148.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387406/normal_5f9c3dea11387.pdfIn PDF document text
    • https://mupibidegupek.weebly.com/uploads/1/3/0/8/130874042/xelelokus-siludofenowabet-morezaf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419236/normal_5fa838b8ba0d4.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://uploads.strikinglycdn.com/files/f4b7fbde-9493-4a36-a1a9-5def5e716827/44876907397.pdfIn PDF document text
    • https://s3.amazonaws.com/wixamupelinere/meluha_ke_mritunjay_book_in_hindi_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a459f3b7-ba66-463c-a043-a183cc744511/hawaii_the_big_island_revealed.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/53c93a10-0c23-4489-9a63-0371a297f09e/78803827268.pdfIn PDF document text
    • https://s3.amazonaws.com/kiwopusafize/nofutawodutolera.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8da2daa3-63aa-4c90-827c-5642316c01e6/14953789177.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dbd318e0-38bb-4335-bc51-5a85faf7da44/yugioh_mai_valentine.pdfIn PDF document text
    • https://s3.amazonaws.com/bokofapig/97989845747.pdfIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/analog_to_digital_converter_nptel.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_off000052a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x52A7 5288 bytes
SHA-256: 388a030ae3d239d5630119f99fc9cfc7513d97686e08614c860a2699917ee677
font_01_sfnt_off00006487.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6487 10864 bytes
SHA-256: ac0963b47c1a87d0dc301a89da8acdb3e33c7ed212f30f9ffacd49458d6fc3fa
font_02_sfnt_off00008974.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8974 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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