Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca403ccfec7a93eb…

MALICIOUS

PDF

55.8 KB Created: 2020-11-08 02:57:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: 5d690f13f38b50a3be07f88f1dda7cf8 SHA-1: a086857678193ee6fe8c0864ee981975174e0df1 SHA-256: ca403ccfec7a93eb58412c6ccdcc81d8cce0034bdd0b8eecfb4307e4b4b9466c
142 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.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://traffking.ru/123?keyword=best+free+iptv+apps+for+firestick+2019 In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366965/normal_5f873c6289c35.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369786/normal_5f924737d8b8b.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/d7206662-3dda-42db-8757-6d902a51ad51/47659636226.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4589517f-9b0a-4beb-9937-7aa510b0da91/diganopularolubaw.pdfIn PDF document text
    • https://s3.amazonaws.com/jesidofefe/vocabulaire_juridique_anglais_franais.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/54843f3a-0619-45af-83fb-983ae817ce17/78747437123.pdfIn PDF document text
    • https://rujakozin.files.wordpress.com/2020/11/87311004398.pdfIn PDF document text
    • https://gogajajar.files.wordpress.com/2020/11/48539197016.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bd3b5c34-cfaf-49c1-b724-486454abf471/zoology_lab_manual_class_12_hsslive.pdfIn PDF document text
    • https://sevuropigo.files.wordpress.com/2020/11/66503563052.pdfIn PDF document text
    • https://fozoned.files.wordpress.com/2020/11/47493566196.pdfIn PDF document text
    • https://s3.amazonaws.com/luresimosip/kebinudegusik.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_off000097e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x97E1 5632 bytes
SHA-256: 9b623bf399794f91b2a10a82ba6c98499c520318711d70ee5e5082a647e46b9e
font_01_sfnt_off0000ab28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAB28 11616 bytes
SHA-256: ac07185b4288e46a5a22696746110f1b047c03d1901e8d541c098195fe515dfc