Malicious PDF — malware analysis report

Static analysis result for SHA-256 a5d72b989bc0ae53…

MALICIOUS

PDF

55.5 KB Created: 2020-10-02 22:36:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: 8422252403a15ebf685c66bcf98759a6 SHA-1: c273c12af8f6d7eabc7c1c5de999bf2561aa12a3 SHA-256: a5d72b989bc0ae53e9bbd0ccb543fd648dfd4d12cb508424abf47396faf305a5
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=elections+of+1824+and+1828+answers In PDF document text
    • https://site-1036800.mozfiles.com/files/1036800/kupomifugenewi.pdfIn PDF document text
    • https://site-1038590.mozfiles.com/files/1038590/lalekefuzik.pdfIn PDF document text
    • https://site-1038979.mozfiles.com/files/1038979/gukujizawede.pdfIn PDF document text
    • http://kojali.ryleyskelton.com/uploads/1/3/1/3/131384169/vejatak.pdfIn PDF document text
    • http://files.mtslma.com/uploads/1/3/2/7/132740463/juzekadilojol.pdfIn PDF document text
    • http://files.jasondsweet.com/uploads/1/3/1/4/131453109/wokugawo.pdfIn PDF document text
    • http://files.kimberleykleczka.com/uploads/1/3/1/3/131398264/kagalemufixoxusajuse.pdfIn PDF document text
    • http://lotulavos.3cfallriver.org/uploads/1/3/0/9/130969742/2150a.pdfIn PDF document text
    • http://files.sisiholisticbeauty.com/uploads/1/3/1/4/131438571/bovigevudo.pdfIn PDF document text
    • http://files.scottishpigs.coop/uploads/1/3/0/7/130739340/lologenirum.pdfIn PDF document text
    • http://files.jeffjuddmusic.com/uploads/1/3/0/8/130814728/zararo.pdfIn PDF document text
    • http://files.ailandel.com/uploads/1/3/1/6/131607010/xiwizof_panixixesuxefo_nukolatomevub.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/1/0478/4760/4383/files/fenipugizomumagafobasen.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1707/5868/files/ipod_users_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/4038/0840/files/pevalukuvapu.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_off00009961.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9961 5532 bytes
SHA-256: f9213444e58532d6a79cab7ceaafe08ec165254070404aa3062fd3d60e85e219
font_01_sfnt_off0000ac61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAC61 10772 bytes
SHA-256: f1fed99bd5e68deec29c190c39dae80bbcbd8eed37ec3a15d8bda1a8c59f6609