Malicious PDF — malware analysis report

Static analysis result for SHA-256 52500b9c2d6ec772…

MALICIOUS

PDF

52.4 KB Created: 2020-10-03 08:37:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 517b4a8ca05d675b97609f4f9c90fee5 SHA-1: b890f4b6e77f452460042eb1b5470754ee109eb5 SHA-256: 52500b9c2d6ec772562d21f95aa8c2c06ac9ac531b184dac435211a2e0c1772f
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://ggtraff.ru/strik?keyword=mrhythmizer+mac+crack In PDF document text
    • https://site-1039711.mozfiles.com/files/1039711/vuzikusokenararotakot.pdfIn PDF document text
    • https://site-1037000.mozfiles.com/files/1037000/38241627750.pdfIn PDF document text
    • https://site-1039212.mozfiles.com/files/1039212/32870846844.pdfIn PDF document text
    • https://site-1037883.mozfiles.com/files/1037883/4455408069.pdfIn PDF document text
    • https://site-1037864.mozfiles.com/files/1037864/dixuwewaketovajakigu.pdfIn PDF document text
    • http://files.mission2hope.org/uploads/1/3/2/7/132710783/fujejajujepe.pdfIn PDF document text
    • http://files.sunsetsailkeywest.net/uploads/1/3/2/8/132814146/569428.pdfIn PDF document text
    • http://files.barnyardventures.org/uploads/1/3/0/7/130738998/romoba.pdfIn PDF document text
    • http://files.hideawayacres.net/uploads/1/3/0/8/130873710/kukerojerokeniw_zazopaxutofux.pdfIn PDF document text
    • http://tipitavog.raggz.org/uploads/1/3/0/7/130738721/gabirisiroximatejo.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/1/0477/2449/5004/files/st_james_farm_preserve.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/4012/6629/files/stardew_valley_marriage_candidates.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4093/0983/files/wow_classic_protection_warrior_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f57937ac-1d90-4689-8528-fd3157a5eade/pinosokog.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/75324e34-2a16-4769-9288-4a6cbb552db4/zawasokobisuwogiluduvatu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bf793ac0-f756-4065-b60d-8c404ea0aa58/84107373938.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d8a48bf-def7-4db7-9f37-c3d5ba82d56b/zaxijepopor.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007044.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7044 5052 bytes
SHA-256: ec87100e983bc206e1a0c2d9e3f5c1a381b92d15df5ce4c883cc66d6d6074868
font_01_sfnt_off00008156.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8156 1800 bytes
SHA-256: 51ebeec29509b87aa858d500e37ac8853184703d07d1f913ce36d8e1dc7764c0
font_02_sfnt_off000089e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x89E4 11132 bytes
SHA-256: b1db2d3d29d1fafdb52696a196a5494a0c91fdd34917f352e6164265ae7cbc8e
font_03_sfnt_off0000af18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAF18 16088 bytes
SHA-256: fff8b70d67420864e2a263fdbbaad35efae781e73a516d3cf38207748e8715b5