Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd2aa25aaeaf3406…

MALICIOUS

PDF

62.9 KB Created: 2020-11-02 11:10:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 66271e5a5c4985fb9090835f634c6bdf SHA-1: 18a181cd7001327bebe31c1c347faf6e2ea37606 SHA-256: cd2aa25aaeaf34064e655c4420019e298780b218bb24b87b6aa5b07f428061ec
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, indicating an attempt to lead the user to a harmful site. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK confirms this, and the ML classifier strongly supports the malicious verdict. The embedded URL is the primary indicator of malicious intent, likely serving as a lure for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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=akuma+super+street+fighter+2+turbo In PDF document text
    • https://kivuligob.weebly.com/uploads/1/3/0/8/130874143/paguv.pdfIn PDF document text
    • https://suganolorifumu.weebly.com/uploads/1/3/0/8/130814011/29c6ad.pdfIn PDF document text
    • https://zotorakiv.weebly.com/uploads/1/3/0/7/130739478/felilif.pdfIn PDF document text
    • https://livabawixegi.weebly.com/uploads/1/3/4/3/134320323/6001749.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/1/0502/7161/7209/files/persona_5_sunday.pdfIn PDF document text
    • https://s3.amazonaws.com/liwafo/sixikejarodizusoker.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/9788/9216/files/60832370748.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/1124/3672/files/liwedopotulubevo.pdfIn PDF document text
    • https://s3.amazonaws.com/wupixufekijax/belajar_codeigniter.pdfIn PDF document text
    • https://s3.amazonaws.com/tesodagiwor/casa_la_parrot_on_28th_street.pdfIn PDF document text
    • https://s3.amazonaws.com/sazixipame/hooded_cowl_sewing_pattern.pdfIn PDF document text
    • https://s3.amazonaws.com/dorobukasawituw/vanguard_prep_school_waco.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7022/5558/files/fukivixakejiduvigixibegu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/395468c0-63ef-4618-97cd-649ef82debc5/95035727435.pdfIn PDF document text
    • https://s3.amazonaws.com/padadutiseni/bin_sachivalay_clerk_syllabus_2019_download_maru_gujarat.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_off00009ddf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9DDF 5608 bytes
SHA-256: 6289b313e5d759283c62144af3c759fdd676eb664887a4ebe38d95c20d4127f6
font_01_sfnt_off0000b0ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB0CE 11628 bytes
SHA-256: b637e91535fbff37748012cc7f8a9c6a29dbdbfcb76970f403653eecfc19f160
font_02_sfnt_off0000d87a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD87A 16244 bytes
SHA-256: 982b698ce9ccae0fa8bb36a083e80cb1342ff4042e3fb7a123c66af5e1c89fdf

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