Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca96da712f3a8c0f…

MALICIOUS

PDF

45.5 KB Created: 2020-11-08 13:51:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-15
MD5: 0bd8ef4c42e702e6bb09b60d10100ef0 SHA-1: 8a8ea551df10dd8f846ce8be596416a851a6c061 SHA-256: ca96da712f3a8c0ff25a72e27d9bf9e068864a6fb8166d46c173c431b21bee24
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • 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://trafficel.ru/aws?keyword=write+a+letter+online+for+free PDF link annotation
    • https://takimibovejexi.weebly.com/uploads/1/3/4/5/134512521/1cc760848d3.pdfIn PDF document text
    • https://dajegasizof.weebly.com/uploads/1/3/4/4/134469490/telivuzumibe-jezomuxegupezuz.pdfIn PDF document text
    • https://juwarojolajekol.weebly.com/uploads/1/3/4/1/134108785/rilamoxa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366993/normal_5f8afb3566994.pdfIn PDF document text
    • https://vozunutav.weebly.com/uploads/1/3/0/9/130969695/fewom.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/2dba210e-5b42-434b-a286-2a41efcbbbee/wavejavifapevubisi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3dd1b96b-64f6-4ef3-b7d5-c307918a1cf6/fofoxuregiruwejabemulezo.pdfIn PDF document text
    • https://momuvabixot.files.wordpress.com/2020/11/bovofojukukurenuvawo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3f6c1517-1ac9-41aa-8edd-a195644eb6d9/vitumisetekezixafab.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/54c9b52a-a1be-4534-aa32-21b3d8c5db5d/67488983846.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_off0000682d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x682D 4384 bytes
SHA-256: 4d648f679b4c4823989e805fe2623ce628d4bf68caceac7522b7f0aaaeae5b5e
font_01_sfnt_off0000771c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x771C 10780 bytes
SHA-256: 6865a5d7cbb31e04a2e578cce1a2d30d69fbdbe02d39d1a374fa5d866374baf6
font_02_sfnt_off00009b59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9B59 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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