Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ae18ad79974f11c…

MALICIOUS

PDF

44.7 KB Created: 2020-10-29 14:27:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 14379362140d9ec272e3e681299d8ec0 SHA-1: 3b2706523af483c3f4ab8ec75c20979472825c99 SHA-256: 5ae18ad79974f11c35aa8147349661823b2b13a004fcfd6f51136908352a083e
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://gettraff.ru/strik?keyword=gravitex+2+custom+level+codes In PDF document text
    • https://cdn-cms.f-static.net/uploads/4374951/normal_5f924b6b1404a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382948/normal_5f8c5c4a7ccb1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388181/normal_5f919997599f6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366042/normal_5f8d764066f76.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/1/0476/6384/1446/files/xadadijifevako.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/8393/2863/files/doroninadepuburalujo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bab67bc6-ae50-4412-90a8-5e06f7d058d1/monofimojipotaji.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2730/7423/files/towerfall_ascension_ps4_trophy_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/0634/0515/files/linguistic_situation_in_nigeria.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/7927/9812/files/ncep_atp_iii.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/da464ffc-ea72-477d-bfad-9c29c81027af/22315765592.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0503/4115/0916/files/download_game_ragdoll_dismounting_mod_apk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0268/8394/8740/files/mini_bluetooth_speaker_sk-s10_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/jezaxojipevu/37701880392.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/8198/4925/files/86801119730.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/2291/6000/files/81790366275.pdfIn PDF document text
    • http://www.kongregate.com/games/kChamp/gravitex-2LevelIn 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_off00006685.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6685 5376 bytes
SHA-256: 4d19cdd7b8ff06c0d64f5e7ff6316374e5a32b855f377e7a3f8ceb0672ea2c43
font_01_sfnt_off000078c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x78C0 14328 bytes
SHA-256: ab17e8b16963019a8d58637b7b902e0bdb0c6abd7302af76408744045bf5f606

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