Malicious PDF — malware analysis report

Static analysis result for SHA-256 a107a9729f2a5c0f…

MALICIOUS

PDF

51.7 KB Created: 2020-11-06 22:03:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 09042f23b3602887ce38549cd576261b SHA-1: 4d291cfe118798e20fde0682500c60b2efe6330f SHA-256: a107a9729f2a5c0f81b0b628af43036f2f620f724d524713eee3c985f46a8e45
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://traffmen.ru/123?keyword=puzzle+time+math+answers In PDF document text
    • https://retinagarar.weebly.com/uploads/1/3/4/3/134319249/dagoxofofizi_bozodupiturizis.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://gorujugiximu.files.wordpress.com/2020/11/karipevo.pdfIn PDF document text
    • https://s3.amazonaws.com/regovadeje/tijikosijonosilali.pdfIn PDF document text
    • https://nevosaxovib.files.wordpress.com/2020/11/vuvemi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c6d57e8b-d0c6-45e2-b991-5f2ab4326407/jakazunus.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0510bda9-5ad1-4a7c-a8ca-d8ac1ea091e3/bikilujesiseb.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4c138f7a-4eba-456e-b4f1-73c802c1be41/vikixerujitevajebufatara.pdfIn PDF document text
    • https://mabimufifu.files.wordpress.com/2020/11/69702276747.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2b0556b0-73dd-4bd5-8a60-7e8a5e4bceb9/pasipijasinopukuge.pdfIn PDF document text
    • https://s3.amazonaws.com/mijedusovineti/51021191668.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/336eb98e-2d3b-466b-9187-9e7873c1994d/watch_trolls_world_tour_2020_123movies.pdfIn PDF document text
    • https://s3.amazonaws.com/kakekojezutok/sample_letter_of_voluntary_resignation.pdfIn PDF document text
    • https://s3.amazonaws.com/suximawo/93592581343.pdfIn PDF document text
    • https://s3.amazonaws.com/rerinago/agile_methodology_types.pdfIn PDF document text
    • https://xozolow.files.wordpress.com/2020/11/kusikowilanemutevafukex.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_off00008c00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C00 5068 bytes
SHA-256: ea2d84945bc95d2e991924529ce2063f1480e039a2918e1e96cf622853365636
font_01_sfnt_off00009d24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9D24 10912 bytes
SHA-256: 679328aaf2e3dcb58ea15e11152706a04cde3f880d418e2a59b539088e72a3ed

Open this report in the interactive analyzer, or submit your own file for analysis.