Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d4807340f605a80…

MALICIOUS

PDF

58.6 KB Created: 2020-10-03 11:32:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 6454706039f19c5da27f8d7c2afd8bb0 SHA-1: a560dc9f9b807bde8593c5527cb52d8394c7f058 SHA-256: 8d4807340f605a80480420d27c1448965e993a10f2d834601f04d2fc33cbbedd
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=paramanya+hile+apk In PDF document text
    • http://files.counseling4thesoul.com/uploads/1/3/1/3/131383586/1615826.pdfIn PDF document text
    • http://femeke.kinderdanceaustin.com/uploads/1/3/2/7/132712380/6882797.pdfIn PDF document text
    • http://files.reallivingyoga.com/uploads/1/3/1/6/131636977/xitofibado.pdfIn PDF document text
    • http://files.sustainablewaresonline.com/uploads/1/3/0/7/130740092/lakegejowoki.pdfIn PDF document text
    • http://files.alexsandrapapoban.com/uploads/1/3/1/3/131398515/bibimoveni-motesujunapor-gabes-nojolojane.pdfIn PDF document text
    • https://site-1039748.mozfiles.com/files/1039748/keranonemonajesepetevid.pdfIn PDF document text
    • https://site-1039923.mozfiles.com/files/1039923/36914617493.pdfIn PDF document text
    • https://site-1038879.mozfiles.com/files/1038879/25950121271.pdfIn PDF document text
    • https://site-1038397.mozfiles.com/files/1038397/99829050412.pdfIn PDF document text
    • https://site-1036671.mozfiles.com/files/1036671/zobijozivuxumuxural.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/1/0492/2756/3164/files/kukeboli.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9881/6160/files/vitagofudojisomipenetuzes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/3524/5209/files/what_does_supercalifragilisticexpialidocious_mean_in_the_dictionary.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9e153193-fa5a-413f-a55a-61af9a906ac8/49274179319.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9f4eff02-2d84-4e58-b47c-8c6d62e39a10/gudetadelupapet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d067f573-7b65-4673-9e6c-fbdfc6413573/69390974392.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1399b0ff-0487-48ca-887b-a7a3afe5fba6/95714742365.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_off00007735.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7735 5048 bytes
SHA-256: 694150c7567b235eb7a5c25c7474a1316f4a067b5e7ec38290d3f2c3478718dd
font_01_sfnt_off00008835.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8835 6724 bytes
SHA-256: cefb6fab518c852be0c2a14cfb3e2b4185996144b1bb33a75554c82cc588a779
font_02_sfnt_off0000a017.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA017 11508 bytes
SHA-256: 5805cebf6890950bac6860b7ce93161ac6e38007bc7e86749d83895daa61c7e5
font_03_sfnt_off0000c750.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC750 16196 bytes
SHA-256: 3f0bfaba9c4069e521271fece81f99e1002a23294d661c10330db830687ea837