Malicious PDF — malware analysis report

Static analysis result for SHA-256 797df9be2802b2ce…

MALICIOUS

PDF

40.8 KB Created: 2020-11-05 02:32:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 715235ed23cd73b55ba3c91a417d1e2a SHA-1: 186e7c547504d1aeb766162609e72e1419872fc0 SHA-256: 797df9be2802b2ce48ef73d4b4d9503c167e40656fccd3233c1b565fd5e1589f
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links, including one pointing to a redirector that appears to be associated with malicious activity. The document body also contains a link that is likely intended to trick the user into downloading a fake application. The presence of a security bypass heuristic further suggests malicious intent.

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.
  • Security software disable instruction high SE_SECURITY_BYPASS
    Document instructs the user to disable antivirus or security software — unusual for ordinary documents and high-risk in an unsolicited file
  • 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://ttraff.link/123?keyword=fnaf+2+apk+download+pc In PDF document text
    • https://razesupimo.weebly.com/uploads/1/3/2/8/132815812/kaxobaferusatejez.pdfIn PDF document text
    • https://kidunaxu.weebly.com/uploads/1/3/1/4/131437100/sulugopenukafunijaxe.pdfIn PDF document text
    • https://sazaxadapu.weebly.com/uploads/1/3/4/3/134330736/59833b3be9304.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366024/normal_5f86f96aafbc6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/bewibiwat/jade_cocoon_2_complete_edition.pdfIn PDF document text
    • https://s3.amazonaws.com/kisimujuk/wetuxumijapejameva.pdfIn PDF document text
    • https://s3.amazonaws.com/zokokamu/paypal_money_adder.pdfIn PDF document text
    • https://s3.amazonaws.com/sugaguxagu/41845648323.pdfIn PDF document text
    • https://s3.amazonaws.com/lolijexejomak/little_professor_bookstore_hours.pdfIn PDF document text
    • https://s3.amazonaws.com/sasufufa/40494279832.pdfIn PDF document text
    • https://s3.amazonaws.com/lopazura/what_is_my_aunt_to_my_daughter.pdfIn PDF document text
    • https://s3.amazonaws.com/zetare/kugifeb.pdfIn PDF document text
    • https://s3.amazonaws.com/tujeviwakirawu/forsyth_county_property_tax_search_georgia.pdfIn PDF document text
    • https://s3.amazonaws.com/jamokaroxoj/fefobefinowokamifoxixi.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_off00006181.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6181 5116 bytes
SHA-256: f8cd338461c07c93fd976f1afd9715e2b4c57d19f67864404f8f370c84bcbf36
font_01_sfnt_off00007328.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7328 10408 bytes
SHA-256: d999e007b6d0fc40b5594ffe7783122ad008ff8777b0f264a72b72a99c001d03

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