Malicious PDF — malware analysis report

Static analysis result for SHA-256 3fff7e811e0e9559…

MALICIOUS

PDF

62.0 KB Created: 2021-01-03 04:53:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 6d61c65e5d60a5b53d57facef4c0c9b6 SHA-1: d9e6f87d4c3f058ae55a26f691877347f3ab0e6d SHA-256: 3fff7e811e0e9559bc191dc4700dfbaa7144ecc5d3d040490b6f7ef249ca06e9
254 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://traffking.ru/wb?keyword=free%20gems%20clash%20royale%20no%20app In PDF document text
    • https://wefolukozik.weebly.com/uploads/1/3/1/4/131406413/xupuwuwirubajazuxemo.pdfIn PDF document text
    • https://gorofegi.weebly.com/uploads/1/3/4/4/134462705/tujanalotakive.pdfIn PDF document text
    • https://junalupi.weebly.com/uploads/1/3/4/4/134460459/606027.pdfIn PDF document text
    • https://giridoxaxe.weebly.com/uploads/1/3/4/7/134703098/26224.pdfIn PDF document text
    • https://morapunepa.weebly.com/uploads/1/3/1/6/131606469/24032fd7d.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/7247c3c5-e96e-4c21-9796-1dee256eb00d/polinomio_ejercicios_multiplicacion.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/376b74fd-d238-4080-9202-43e33627c0b3/rimezinewuwinimuwatene.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d9872778-7890-49e0-9f42-920960fc6561/zitobox_games_free_coins_2020.pdfIn PDF document text
    • https://s3.amazonaws.com/nilititonawafim/auto_submit_form_javascript_on_page_load.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bae74ee6-2854-44ea-997f-0aace274640b/fabijibatewox.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/16bb5afc-7434-427c-ae47-fb7623fde06f/lufatanamula.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/861d7fca-34aa-404f-80bb-b27b3f39e3af/foxopujuraguvatako.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ae077174-b6cd-4b79-9325-3707bb7aced1/sevtech_ages_download_tlauncher.pdfIn PDF document text
    • https://s3.amazonaws.com/zuses/vsco_x_mod_apk_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d3cf1872-47fe-47ee-8c87-14db91e17d6d/doodle_bowling_mod_apk.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_off0000b7ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB7AB 5404 bytes
SHA-256: b7a67e0e8a08c767905b24d8da56a1de9ae5fb68668702105c8c64a4da1b68a7
font_01_sfnt_off0000c9f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9F4 9860 bytes
SHA-256: 218576ca2a3a88fbd3b37d5d6d345d6bb3dc982aaae9d6a581f1a885963ba0e9

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