Malicious PDF — malware analysis report

Static analysis result for SHA-256 836478ce98f28538…

MALICIOUS

PDF

47.7 KB Created: 2020-08-23 13:40:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: f761f369a5de19de19892fcfab167150 SHA-1: f8c2f677d270e008d9ec397019029efdc9014cf9 SHA-256: 836478ce98f285380ff2cb526054d8c16269e0e174f8f1f5293573e4a0cf49c2
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.com/pify?keyword=bhoomi+album+songs+free In PDF document text
    • http://files.jackybeyoga.com/uploads/1/3/1/4/131482988/joposevubuxogosazunu.pdfIn PDF document text
    • http://japodo.perandoe.org/uploads/1/3/2/6/132682261/morexigoxapukuku.pdfIn PDF document text
    • http://files.globalmusicsong.com/uploads/1/3/1/3/131384407/59eaed6b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5355/5624/files/andy_james_the_wind_that_shakes_the_heart_tab.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6450/9094/files/24555232075.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8720/0418/files/dji_phantom_4_pro_v2_0_datasheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8096/5534/files/39314879658.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1382/3909/files/10942946631.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1570/7551/files/28561650907.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8307/1650/files/kejenulotalu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0452/6263/5168/files/geronimo_stilton_books_online.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4035/9068/files/18801925045.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5031/1579/files/positive_and_negative_effects_of_globalization_essay.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0447/6397/1733/files/10934530163.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_off00007063.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7063 5368 bytes
SHA-256: 8bd5044a27038dd3f9453b3e1c7dcab12c3ad7d51df241b5776837eb3825ee14
font_01_sfnt_off0000827f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x827F 14436 bytes
SHA-256: 7e11f4bc82af1b2cb088236f6fd90f22448496f464c51456c212a4258d259269

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