Malicious PDF — malware analysis report

Static analysis result for SHA-256 765a974115c610a0…

MALICIOUS

PDF

48.6 KB Created: 2020-10-08 19:08:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: d47ac096a269591bc74f16ded163fa1f SHA-1: bb307997ba78c0e558430373c6e4ff312f1c8d24 SHA-256: 765a974115c610a04a3d19e4bba889e43e125ed97b2cd0a5f673d82aed05108a
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://ggtraff.ru/strik?keyword=curse+of+the+crimson+throne+anniversary+edition In PDF document text
    • http://jubadopuz.tigercubslindfield.org/uploads/1/3/1/6/131637432/puwozotukiliw.pdfIn PDF document text
    • http://files.fraterautomation.com/uploads/1/3/1/8/131871433/nivedipumazezi.pdfIn PDF document text
    • http://files.wildstringsandthings.com/uploads/1/3/1/3/131384145/gufusixugawabu.pdfIn PDF document text
    • http://files.jewelsbytammie.com/uploads/1/3/0/9/130969003/6312798.pdfIn PDF document text
    • https://site-1039171.mozfiles.com/files/1039171/50678679929.pdfIn PDF document text
    • https://site-1036864.mozfiles.com/files/1036864/vafukesejomuduzarunik.pdfIn PDF document text
    • https://site-1036812.mozfiles.com/files/1036812/81383901800.pdfIn PDF document text
    • https://site-1039423.mozfiles.com/files/1039423/revenevemasilirebanij.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://uploads.strikinglycdn.com/files/e90d7281-152f-4e29-8202-266337057704/34763138885.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/51531804-41a0-4979-b591-8af5c1a30d8d/5707030384.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/115b15e0-30bf-4adf-a0c1-58174e8f98ff/putabov.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/3834/5882/files/valemuwe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/3618/3194/files/works_cited_practice_worksheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/2564/0857/files/jewivigexefuletofusaromaf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/8394/2038/files/portable_wifi_hotspot_apk_free_download.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_off00007354.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7354 5296 bytes
SHA-256: 6a3e94e3ec16e8dcc8fed82bbef6c1c1619d1aa3b4ca84e71adb601f7813de78
font_01_sfnt_off0000853c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x853C 9880 bytes
SHA-256: 8fc71cef2d6ca22bc35f629399460d5861a25a0660b55e1a816ef550bd70f4a8
font_02_sfnt_off0000a70c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA70C 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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