Malicious PDF — malware analysis report

Static analysis result for SHA-256 f52bc6a5478eff70…

MALICIOUS

PDF

45.2 KB Created: 2020-11-07 15:39:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: c4a8e4d9de6cc39e9de305f354eaf626 SHA-1: 15b6478106805459432a4f7b64ea98ebb1d7941d SHA-256: f52bc6a5478eff709b6de7dfb6cf31b9f739e9c6ec93043f923560aec5dbcd43
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://traffking.ru/123?keyword=teacher+retirement+letter+to+employer In PDF document text
    • https://cdn-cms.f-static.net/uploads/4402486/normal_5f95f912ac068.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381091/normal_5f9107a36a544.pdfIn PDF document text
    • https://jeponiruwapin.weebly.com/uploads/1/3/0/7/130776483/5d52e240d.pdfIn PDF document text
    • https://vosaxoro.weebly.com/uploads/1/3/4/4/134469305/zipevowuti.pdfIn PDF document text
    • https://gozexorajive.weebly.com/uploads/1/3/4/6/134610068/watafawamu.pdfIn PDF document text
    • https://lamuvoraraxuz.weebly.com/uploads/1/3/4/4/134486612/dimoba_sezevibu_rajukujupepo.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://s3.amazonaws.com/jaburirarov/24564141249.pdfIn PDF document text
    • https://s3.amazonaws.com/nazekisigiduz/white_cloud_flea_market_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/figugipopar/acordes_bossa_nova_guitarra.pdfIn PDF document text
    • https://s3.amazonaws.com/felasorarabipis/ronimowopevasebefiwim.pdfIn PDF document text
    • https://s3.amazonaws.com/fonazuzixagizir/basil_adalah.pdfIn PDF document text
    • https://s3.amazonaws.com/gavexilatuvitaz/85606325070.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_off00006560.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6560 4836 bytes
SHA-256: d784649c1c48e5dfc6aa6131174ae1c852173948377c8e6e4190295c3e8fd09d
font_01_sfnt_off000075a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x75A1 10836 bytes
SHA-256: 56238999250338a3138760f8f144c3281a20ed0e6da5082f68d7139719fb7f0f
font_02_sfnt_off000099ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x99CE 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71