Malicious PDF — malware analysis report

Static analysis result for SHA-256 51ca81202d35c8e9…

MALICIOUS

PDF

61.8 KB Created: 2020-10-27 11:55:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: cc4e582543b361db42ed8ff56c363d8d SHA-1: d035bff4d1b7ffb7d97df67991b4053f9ab3b06f SHA-256: 51ca81202d35c8e94da96473fdaf11834b5ad2801e1da7689d37541acd169dca
134 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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=vampire+knight+zero+tattoo In PDF document text
    • https://cdn-cms.f-static.net/uploads/4387919/normal_5f8d93312b320.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378855/normal_5f97518ddc530.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368735/normal_5f9015cef3360.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369322/normal_5f8b66e47e08f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381291/normal_5f95efcc0c293.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374199/normal_5f93b51bae8ed.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370996/normal_5f9270edf195c.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/3aeb614b-6807-4962-98f2-ea7be8c44088/tufopixubepobejupe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/62faae16-360f-4b0a-a244-5d3244fe69e5/45882504126.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/87c9f152-d520-4d8e-a0ed-b9d805b2604b/60568159040.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/89dd9008-d5cb-4c82-946c-aef69fa66094/90439132034.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f9c98c16-040a-4451-8aba-7ac50e7d66cb/vasupeditamanaviwewepiv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0503/0005/9833/files/72991593969.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0504/5456/0928/files/white_rage_free.pdfIn PDF document text
    • https://s3.amazonaws.com/vexosafugunu/putezomamojoderegaxivu.pdfIn PDF document text
    • https://s3.amazonaws.com/gezetega/wejaxajenutotugawuvuvopu.pdfIn PDF document text
    • https://s3.amazonaws.com/leguvefu/vaxakelivawagesuzigumoke.pdfIn PDF document text
    • https://s3.amazonaws.com/zidosozawok/hindu_calendar_2020_with_tithi_in_hindi.pdfIn PDF document text
    • https://s3.amazonaws.com/nuxulikiwab/kerala_hindu_baby_names_malayalam.pdfIn PDF document text
    • https://s3.amazonaws.com/jadere/job_application_letter_sample_philippines.pdfIn PDF document text
    • https://s3.amazonaws.com/fujadabez/edema_cerebral_tipos.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_off0000a117.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA117 4496 bytes
SHA-256: ccb3bfb55341806cdb13ea3788c96288e0fb9c627dc8663b0045aec5c139d083
font_01_sfnt_off0000b0ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB0AC 5104 bytes
SHA-256: 74a49a7bcf6495287953b77a1560a40b576a4ef378a83960e8e1f2f11de66216
font_02_sfnt_off0000c1eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC1EB 11700 bytes
SHA-256: 1cb25a42fa31059269b9eea26ee9f0f899df1481420b6cbe40d81d272e011b08

Open this report in the interactive analyzer, or submit your own file for analysis.