Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d8733de40a0ce99…

MALICIOUS

PDF

52.5 KB Created: 2020-10-31 12:08:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: ed77a7f5546ec25754edcfdcbf3639a3 SHA-1: 920ce8cab1fce5c261d5ec576c601b257f176333 SHA-256: 2d8733de40a0ce99aac7fc47a782bb2a9b45666f6d4f6c8c340a3c98ec068228
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=snow+canyon+middle+school+phone+number In PDF document text
    • https://cdn-cms.f-static.net/uploads/4369317/normal_5f882ac87b92d.pdfIn PDF document text
    • https://babikovinemixe.weebly.com/uploads/1/3/1/8/131856339/b3f38b669d.pdfIn PDF document text
    • https://bibeliki.weebly.com/uploads/1/3/0/7/130738572/a308adca0d.pdfIn PDF document text
    • https://xuvakaxatal.weebly.com/uploads/1/3/1/0/131070170/42b867.pdfIn PDF document text
    • https://junovolosexev.weebly.com/uploads/1/3/4/4/134467690/9776964.pdfIn PDF document text
    • https://feloxoxux.weebly.com/uploads/1/3/4/0/134000485/1575072.pdfIn PDF document text
    • https://wiwanozamo.weebly.com/uploads/1/3/4/3/134306351/kumoxapo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/sepawi/aristoteles_y_dante_descubren_el_universo.pdfIn PDF document text
    • https://s3.amazonaws.com/zerejibixupav/que_es_degradacion_ambiental.pdfIn PDF document text
    • https://s3.amazonaws.com/fofeguj/nazir.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3a0139bc-6ae7-4c2f-9018-82ca955c6f01/68145456241.pdfIn PDF document text
    • https://s3.amazonaws.com/sugaguxagu/january_2017_printable_calendar.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_off00008e71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E71 5752 bytes
SHA-256: db9e7b6d0a6cb46d6a711cc835a06aa8299f7b313eab6a45cc477b95a67d39f2
font_01_sfnt_off0000a1e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA1E9 10304 bytes
SHA-256: 2ef9f06e3afc4f5bb5a245c2339c91197cad984e50eff2fd967a6d339982bb96