Malicious PDF — malware analysis report

Static analysis result for SHA-256 902be65b3e4e1f77…

MALICIOUS

PDF

35.8 KB Created: 2020-10-05 05:36:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: e906a0878b098a678bba96b4a1cbece1 SHA-1: 2d26a7f6f140c3025f5542006d67bced49a5aedc SHA-256: 902be65b3e4e1f77005645858a64f5dd3ddbe8dbebf45478d57645aa2d9894f7
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=principles+of+physics+s+chand+pdf In PDF document text
    • http://files.professionalcatcare.com/uploads/1/3/0/9/130969580/fixokejivuda.pdfIn PDF document text
    • http://files.midwestnha.com/uploads/1/3/1/6/131606402/6619683.pdfIn PDF document text
    • http://mijijovep.marissaoneil.com/uploads/1/3/1/4/131406286/sazerenu.pdfIn PDF document text
    • http://files.pugdogclubofamerica.com/uploads/1/3/2/7/132740464/00d422c98.pdfIn PDF document text
    • http://fomumu.sandiegopottersguild.org/uploads/1/3/2/6/132682006/lirusupiwosuw.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/73d138c0-a27f-4751-a9a1-9a8fb1ee8059/zuvagadexaxuzigagemeper.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/62c85114-6b6f-4d39-977d-b0abfe30d3b6/lopugotewasonokoxe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/344bcd9e-e34e-4446-9f9d-1b93202de4cb/zefikidesusuragum.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/922352fe-439d-4f21-910e-ae43a09f48d6/lonube.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ca6ebc15-d49f-4a09-abb7-353bb64b8f8f/webizawigazuguf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/638f2429-2d6c-43a2-bf3c-d0a74b36776d/72070377620.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb596a00-ec6f-4d90-bda3-ee7240552d64/kuvulusano.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8281/7441/files/tribes_and_empires_storm_of_prophecy_sequel.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4362/5880/files/allegory_of_law_and_grace.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0488/4643/8565/files/58079064822.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/9576/2106/files/niseropofixod.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_off000043e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x43E3 5052 bytes
SHA-256: ae894ed693a1d66d96f6331cd084618a41be92b92eac7a69e80e581161cbb1b5
font_01_sfnt_off000054fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x54FB 9100 bytes
SHA-256: 73e540c570dd6fc7f5180cc134c2ae78b617cd58375d0c67c23ba0f950148467
font_02_sfnt_off0000740f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x740F 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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