Malicious PDF — malware analysis report

Static analysis result for SHA-256 d45a013dda8d3ac9…

MALICIOUS

PDF

45.1 KB Created: 2020-11-03 16:41:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: 1517799ce5dea4cd3b8c6e37ef5b46d5 SHA-1: b027ad3db863c3a5b3dd96e8a0301eaa80e7f634 SHA-256: d45a013dda8d3ac9bc2c567c2710e1c54671c178c030278c60677cf9472db30f
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.cc/123?keyword=dances+with+wolves+parent+guide In PDF document text
    • https://xixunogada.weebly.com/uploads/1/3/4/3/134343035/wamakepaso-muwevubozusamu.pdfIn PDF document text
    • https://nirawulef.weebly.com/uploads/1/3/4/3/134324477/xezomimimusunigubux.pdfIn PDF document text
    • https://vewutaniwem.weebly.com/uploads/1/3/0/8/130873717/vemegarobema-xinexolo-gavegomavaxovow.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/00402e79-7609-4a9b-a82e-bbae69be049a/cuentos_de_fantasia_largos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0503/7372/2310/files/uber_app_download_for_android_mobile.pdfIn PDF document text
    • https://s3.amazonaws.com/jamokaroxoj/68094493217.pdfIn PDF document text
    • https://s3.amazonaws.com/zijivevip/core_java_tutorial_point_download.pdfIn PDF document text
    • https://s3.amazonaws.com/fosagoba/dnd_5e_identify_monsters.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6e600f7a-9094-4ed3-b3ec-8bc6a463433f/90445538550.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b4b1758-bf2c-4a57-ba55-cdf3c1b11eaf/56388590056.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/759503d9-84f0-4d97-b404-77e5a238e0f6/average_atomic_mass_worksheet_answer_key.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_off000070f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x70F1 5484 bytes
SHA-256: 0b4bb5b7b040298373965456664865224883b11bf8cf31d0add44b602e7a1348
font_01_sfnt_off000083af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x83AF 10480 bytes
SHA-256: a12f2eb549414a62a4abbc0052cdfdc2b15e8f03225d0eb399a4294b48a6902d