Malicious PDF — malware analysis report

Static analysis result for SHA-256 8503e69e6dcb3257…

MALICIOUS

PDF

42.4 KB Created: 2020-10-11 02:55:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 5936b1e64c15e65f51ec3d5d2533b349 SHA-1: 776de55229070c92287b9d7ee44a62ff11a0fa5f SHA-256: 8503e69e6dcb3257bb63d38f26f6c2a22bdc190d726df589bd4daf713cd64ceb
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=my+time+at+portia+rule+34 In PDF document text
    • https://site-1036754.mozfiles.com/files/1036754/juxuxilezuginokulimawam.pdfIn PDF document text
    • https://site-1037018.mozfiles.com/files/1037018/pukikuxezovusivimireru.pdfIn PDF document text
    • https://site-1039667.mozfiles.com/files/1039667/tadutujafamafafawolini.pdfIn PDF document text
    • http://fuvux.jar-labs.vomifix.com/uploads/1/3/1/4/131407815/rekodobosutiral.pdfIn PDF document text
    • http://files.clevelandchamberchoir.org/uploads/1/3/0/7/130775653/nunuguzagira-godirizija-boruvuvafe.pdfIn PDF document text
    • http://files.newdawnmovies.com/uploads/1/3/1/4/131453527/xewafojokijepep_wivusen_zukigejipowim.pdfIn PDF document text
    • http://files.azcrossstitch.com/uploads/1/3/1/3/131382595/wolos.pdfIn PDF document text
    • https://site-1036955.mozfiles.com/files/1036955/fupazobodesegonigukuto.pdfIn PDF document text
    • https://site-1037121.mozfiles.com/files/1037121/46119222644.pdfIn PDF document text
    • https://site-1039506.mozfiles.com/files/1039506/76243570357.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/1/0481/2380/5847/files/lego_star_wars_microfighters_mod_apk_android_1.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/5381/7252/files/dragon_ball_z_devolution_unblocked_games_at_school.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/5015/3622/files/metafisica_ley_de_atraccion.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_off00006944.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6944 5148 bytes
SHA-256: d6130719a644c23261befb97eaf48bd10d40d40840be27494d6cc1883bdf6770
font_01_sfnt_off00007abf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7ABF 10108 bytes
SHA-256: 85ee1c5b6f9fa9579d3afa2d9fd1faf3eceb8dd93ec9bf64284f12ef1e2f5304