Malicious PDF — malware analysis report

Static analysis result for SHA-256 3688be39c87dabb0…

MALICIOUS

PDF

40.8 KB Created: 2020-10-14 19:54:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: 6b497f30de49d216953ca83c45fd600a SHA-1: 0e0b30daa039196c03e9b115eb542989aab02bb2 SHA-256: 3688be39c87dabb038c4213012cb0928bbd1cf140843ff41310d5f3ab2cb9d5e
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.club/pify?keyword=android+studio+text+alignment+not+working In PDF document text
    • https://kabudededawizo.weebly.com/uploads/1/3/1/3/131383409/8644275.pdfIn PDF document text
    • https://sesuwulot.weebly.com/uploads/1/3/1/4/131438847/400883.pdfIn PDF document text
    • https://gevafitasib.weebly.com/uploads/1/3/1/3/131380901/1429013.pdfIn PDF document text
    • https://site-1039517.mozfiles.com/files/1039517/lozepo.pdfIn PDF document text
    • https://site-1042429.mozfiles.com/files/1042429/zigutawozed.pdfIn PDF document text
    • https://site-1042593.mozfiles.com/files/1042593/87461314242.pdfIn PDF document text
    • https://site-1040977.mozfiles.com/files/1040977/83295860308.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/46ea0e71-9d62-43ff-97e7-3fc7fb351a9a/22955166313.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/0020/7272/files/87480049691.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3770/4867/files/rwby_ursa_art.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/5505/0652/files/93858701561.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/4047/1702/files/29570376553.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_off0000583d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x583D 5360 bytes
SHA-256: 82eb8311f7cfb3ab434f66fb0e2261012e3c70137ee51f6a6a4df286ef74688b
font_01_sfnt_off00006a70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A70 13576 bytes
SHA-256: a851e5ffe8050278d3205f9fcb440662de47deed3cbdf0dcc1c8e449d750c0e8