Malicious PDF — malware analysis report

Static analysis result for SHA-256 e83c2ae8e725337a…

MALICIOUS

PDF

36.5 KB Created: 2020-10-08 07:10:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 4492c70c76d57476f802c45e051ab27d SHA-1: 054a6cdb6789511c55a556d53e25da22ee58b72c SHA-256: e83c2ae8e725337a42caf1fc383bd7bafd687c567d3f8f04c9f023ca046aa6ae
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://cctraff.ru/strik?keyword=precision+pds+4700+manual In PDF document text
    • http://files.tooldesignsolutions.com/uploads/1/3/1/8/131856290/laribo.pdfIn PDF document text
    • https://site-1037219.mozfiles.com/files/1037219/dutaguxuruxaloro.pdfIn PDF document text
    • https://site-1036689.mozfiles.com/files/1036689/wejolep.pdfIn PDF document text
    • https://site-1038660.mozfiles.com/files/1038660/wetasi.pdfIn PDF document text
    • https://site-1037224.mozfiles.com/files/1037224/67759797549.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/1/0434/3113/3351/files/beta_blocker_conversion_nebivolol_to_metoprolol.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/2258/8320/files/packet_tracer_2.2.3.4.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/8860/4061/files/robious_elementary_school_calendar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5912/5153/files/2002_mitsubishi_lancer_oz_rally_owners_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/99062830-6adb-4d9b-b583-0aa898e1dc2b/15845224238.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/438faa8f-eacc-4a78-b118-5dffc90c6e9d/95522119560.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_off00004f67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4F67 5528 bytes
SHA-256: e484c1055f3a734e11d4423cb15d6b7d7cbc65f99021822889a916d9606bc1cd
font_01_sfnt_off00006224.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6224 10400 bytes
SHA-256: 174c960e9212db112686bd54de85e99ee09945ead54b6e014a0c3c184c9fd345