Malicious PDF — malware analysis report

Static analysis result for SHA-256 a4e4941309a50c77…

MALICIOUS

PDF

50.8 KB Created: 2020-11-03 06:41:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: 3cb8ddc3f9d3649f4d6eae40c957125c SHA-1: 5541046ca4ff90d06e0fc5a84364a6047e77a4aa SHA-256: a4e4941309a50c77edeedb41fc20b918647bd19b6aab9e47ffa28a705610d0a6
234 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • ClickFix social engineering attack high SE_CLICKFIX
    Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
  • 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=windows+10+error+code+0x80070141 In PDF document text
    • https://pazijovipa.weebly.com/uploads/1/3/4/3/134327002/sejibolivubejit.pdfIn PDF document text
    • https://xazujojupise.weebly.com/uploads/1/3/4/4/134493550/bixowevevexe.pdfIn PDF document text
    • https://saxibodusazo.weebly.com/uploads/1/3/0/7/130740440/1407642.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/9c6b3b29-a853-47fd-b61d-ad6dc2eb0ecc/download_whatsapp_apk_for_windows_7.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9852528d-11b0-4bb7-9294-87bf53915f67/rebexotuva.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3d30e341-ffee-4780-b1bd-2422712520b9/taluvu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0495/7841/0136/files/8241572556.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/de5bb11f-554a-4a7c-8de9-01d8cd8f8538/ruketosigedunovadez.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0268/8394/8728/files/futefatulinadetadejop.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9204/2137/files/faema_e98_president_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/645e1776-9737-41ec-b5ec-182aa4d7a262/manual_pratico_do_mecanico.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/679bb42e-4485-4a8a-ada8-e7036ee8e356/85682194989.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/52b8937f-66c8-4e3b-bdb0-6be664680322/zufigarugojureduvekinob.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_off0000794b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x794B 3684 bytes
SHA-256: a12ee7081491b1d79d89cbee34a6acb31edb9dc607a90b965bbaa095d7f49d0a
font_01_sfnt_off0000867e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x867E 5420 bytes
SHA-256: 96a6336a21e91571e3881ba20ffbb7505a554904a2272cbf81bcb2a4c502af10
font_02_sfnt_off0000992f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x992F 10760 bytes
SHA-256: e66e1541062a5d2c6926b324495242cdc1b1a4bea0da825f22b69e9eed56e112

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