Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d620cd882d1c7ae…

MALICIOUS

PDF

65.9 KB Created: 2020-11-09 03:38:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: cd730f21e011f6c4b3d96555330e1770 SHA-1: 17e23dd18d2a68dcc831255659e174a59d80a78c SHA-256: 2d620cd882d1c7ae63b987116c06b2a466430081b8f254fb60404c40bbf1976f
144 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://trafffi.ru/aws?keyword=tam+appar+font+free+download PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4379498/normal_5fa0c77b51f74.pdfIn PDF document text
    • https://moxitimufetumo.weebly.com/uploads/1/3/4/0/134040580/femonezarazuj_pubebo_memifagijujofi_ruwevu.pdfIn PDF document text
    • https://defoxili.weebly.com/uploads/1/3/4/5/134527702/2906941.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413228/normal_5f963fb8accb5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384036/normal_5f8f5a9664ad7.pdfIn PDF document text
    • https://wuwotozon.weebly.com/uploads/1/3/4/3/134315251/jajeladupevanuvel.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401696/normal_5f90ab73ad328.pdfIn PDF document text
    • http://fedorahosted.org/lohitIn 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/7f181ae0-dd0c-4b97-a3a5-d25d62c8a49f/72542555632.pdfIn PDF document text
    • https://s3.amazonaws.com/kewuxejikiwe/garden_in_spanish_language.pdfIn PDF document text
    • https://s3.amazonaws.com/donake/viwivafexowoxerilulugu.pdfIn PDF document text
    • https://s3.amazonaws.com/nujosuwemedadi/timasabes.pdfIn PDF document text
    • https://s3.amazonaws.com/jamokaroxoj/37744681486.pdfIn PDF document text
    • https://s3.amazonaws.com/kigavanus/48116723132.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/854aceba-d69c-48ef-9156-b54ab3027f41/premiere_pro_cracked.pdfIn PDF document text
    • https://s3.amazonaws.com/zaxuledo/52263352886.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
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off0000a76d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xA76D 8792 bytes
SHA-256: 8b745086349dbc31cc457163ace0b35b355c9141c1a60b405ec14c239927d7a9
font_00_sfnt_off00009645.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9645 5052 bytes
SHA-256: c9c72b6c9a0cb753200c9c635bfa72b2cea4efe33edf4449a7917cd94d4a56f2
font_02_sfnt_off0000bf39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF39 4580 bytes
SHA-256: e5a46492899e6437ffc04c417bd206785b94a2efb45bbe1123343047560dc3a5
font_03_sfnt_off0000cdf2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDF2 13188 bytes
SHA-256: c59109cc55b83765f343a6b71809d487326830fe83cc31f8ed1bc7ffa27e41bc

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