Malicious PDF — malware analysis report

Static analysis result for SHA-256 380082482a7e0c2d…

MALICIOUS

PDF

41.5 KB Created: 2020-10-01 00:52:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 5c1c12e829483f5bc198d899acf314b6 SHA-1: 9b2d9a94b486c838f468eaa2091d4f025063abee SHA-256: 380082482a7e0c2d03a6e0fc209528a15f630b1be0aa5076e0c5c40334f555c4
164 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.
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://ggtraff.ru/strik?keyword=social+entrepreneurship+textbook+pdf In PDF document text
    • http://files.tntwfg.com/uploads/1/3/0/7/130776589/wakoj-bozurat-roxojevawawiwil-peguvojabo.pdfIn PDF document text
    • http://files.buckinghamshirelandscapegardeners.com/uploads/1/3/0/7/130775607/4747481.pdfIn PDF document text
    • http://files.oddvoxel.com/uploads/1/3/2/6/132681144/jewumifu.pdfIn PDF document text
    • http://files.amandascanlon.com/uploads/1/3/0/8/130874485/e526986098b9d.pdfIn PDF document text
    • https://site-1036941.mozfiles.com/files/1036941/65065193367.pdfIn PDF document text
    • https://site-1037141.mozfiles.com/files/1037141/94267044162.pdfIn PDF document text
    • https://site-1038427.mozfiles.com/files/1038427/39166975295.pdfIn PDF document text
    • https://site-1036730.mozfiles.com/files/1036730/70880608374.pdfIn PDF document text
    • https://site-1039631.mozfiles.com/files/1039631/94826756272.pdfIn PDF document text
    • https://site-1038949.mozfiles.com/files/1038949/kefulemijokazidez.pdfIn PDF document text
    • https://site-1039809.mozfiles.com/files/1039809/dorinuwa.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/1/0428/8951/1071/files/69172068430.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1925/5454/files/71189016186.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/0896/4246/files/fomerutesonuj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/98029452840.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_off00006301.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6301 5620 bytes
SHA-256: 3df53186c2de550ecb1017a5dd0c48e256b6082e4a2b12b013db84495e37ce1d
font_01_sfnt_off0000761a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x761A 10328 bytes
SHA-256: f1c829b416885a9d29fa300d4ca905c3208326e4ee9eae13320a6b1b532bef50

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