Malicious PDF — malware analysis report

Static analysis result for SHA-256 43e844cebb0f1fc1…

MALICIOUS

PDF

40.4 KB Created: 2020-10-03 03:59:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: 3ff9feedda2b981ba8e74f32cf88cc0e SHA-1: 7870a0f562e95c679d09561b075dc3a096dc987e SHA-256: 43e844cebb0f1fc13bf1cb61e25bbf505926d00a95116d8e6ffdb8ec1bba7579
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=meaning+definition+nature+and+scope+of+international+relations+pdf In PDF document text
    • http://files.msnlawoffice.com/uploads/1/3/1/4/131454034/vajupomanuxe-gabuna.pdfIn PDF document text
    • http://tobujote.reynoldsyachts.net/uploads/1/3/0/7/130775768/b439a6454258dd2.pdfIn PDF document text
    • http://files.amandafitzpatrick.com/uploads/1/3/2/7/132740662/xozibimisuk.pdfIn PDF document text
    • http://bunizi.jackybeavaneventing.com/uploads/1/3/0/7/130740062/4332952.pdfIn PDF document text
    • http://files.ifljumpstart.com/uploads/1/3/1/4/131438008/8641138.pdfIn PDF document text
    • https://site-1037228.mozfiles.com/files/1037228/powodu.pdfIn PDF document text
    • https://site-1039270.mozfiles.com/files/1039270/35281125501.pdfIn PDF document text
    • http://pilofog.mbtheplacetobe.com/uploads/1/3/1/6/131606339/475a2d40.pdfIn PDF document text
    • http://nogopi.gulliverstravel.com/uploads/1/3/0/9/130969204/tupabenutufezi.pdfIn PDF document text
    • http://dujikowaf.getstitchedsewingstudio.com/uploads/1/3/0/7/130740597/9426177.pdfIn PDF document text
    • http://files.veracitymediagroup.com/uploads/1/3/2/8/132815732/nagipifugigov-jojokuwuzanesos-tegano-dedajujixa.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/1/0482/1791/5544/files/lufijovofitutasamovada.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9888/1704/files/montana_license_plate_requirements.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_off00006093.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6093 5328 bytes
SHA-256: fb5ec636567c9456102a93d063d27f830b2dee911729ae2930584374fa166325
font_01_sfnt_off000072d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x72D8 9720 bytes
SHA-256: e2978ced7cc8458da28c022b8d2b3e58c64cdc762346ee181e46c19d9b3e537f