Malicious PDF — malware analysis report

Static analysis result for SHA-256 0aa2338cde6cc6a4…

MALICIOUS

PDF

54.2 KB Created: 2020-10-08 03:34:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 1c1486d1987b500fd340c7e8ad5d3cd9 SHA-1: 61c22668610c9f1a736c344e27a0c3ac86b43dee SHA-256: 0aa2338cde6cc6a41ce4197310a3ce757fff68e2bde9a09ed63878f1e367f02e
184 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.
  • 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://cctraff.ru/strik?keyword=unisa+rpl+application+form+2019 In PDF document text
    • http://files.privategermanytours.com/uploads/1/3/0/8/130813779/baea1e25.pdfIn PDF document text
    • http://files.entranceexams.greatwebsitebuilder.com/uploads/1/3/1/8/131871414/8d568.pdfIn PDF document text
    • http://files.jodiryanphotography.com/uploads/1/3/0/7/130740438/gabufap.pdfIn PDF document text
    • http://gewazur.crittersitterjc.com/uploads/1/3/0/9/130969959/lafag-xowujadupusozoj-piwadibesagituv.pdfIn PDF document text
    • http://files.podantics.com.au/uploads/1/3/1/4/131438260/9585413.pdfIn PDF document text
    • http://files.ministrieswithoutbordersphil.com/uploads/1/3/2/3/132303147/padotevud-basixewalokamo-lujonimipijir.pdfIn PDF document text
    • http://files.amateursubiepros.com/uploads/1/3/0/7/130740623/4043457.pdfIn PDF document text
    • http://futirus.shirelandscaping.com.au/uploads/1/3/0/9/130969723/zizuzunupozekef.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/6f24995c-6d18-4003-9f3e-6ca6a619c6af/junamidipimagemuluze.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1166249e-b871-4715-b7a5-6f2d2b1bf484/tuvujowix.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3dc9c33a-c9d0-4b91-8312-f3da7bec204c/67641517793.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4fb87c45-1382-47b6-93f4-3da9dc92eaeb/25365293241.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7caf5600-eaee-473f-a56a-0bb815d478c9/laxerakixemexojagaze.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0465/2780/7646/files/dewalt_planer_stand_dw7350.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0488/3398/6725/files/wauseon_middle_school_powerschool.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0478/4252/5343/files/vonetodasazuxexet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0488/3500/2533/files/52015861751.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9997/1999/files/conversion_32_oz_to_liters.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007c72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C72 5636 bytes
SHA-256: d03aec160b7e09180768baad4b10f540769092cd6f5b5f95fd579ec953375c1d
font_01_sfnt_off00008f8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F8B 10280 bytes
SHA-256: 06711864c69a59831644d0b75479ed696c8c4a3bda94384e77a8d82da7ba6dae
font_02_sfnt_off0000b296.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB296 17004 bytes
SHA-256: be5d56c1ee67cec1c3cd425c151939269e7e78b2df4089e9ffae28d3f3a9773f

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