Malicious PDF — malware analysis report

Static analysis result for SHA-256 21c49bb569a90bff…

MALICIOUS

PDF

114.0 KB Created: 2021-05-27 13:46:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 34ac5b6869504c8f963c0d625190cc1c SHA-1: 43a4a227bfacbca06f6be0c06463cc8b33f2ebda SHA-256: 21c49bb569a90bffc48801db369716837c9d65b5cbd91001eb941e7bc7e37fc8
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous external links, many of which point to SEO redirectors designed to phish users. The primary lure appears to be 'gba emulator ios 14', directing to a URL that is part of a link farm. ClamAV and ML classifiers also flagged this PDF as malicious, indicating a high likelihood of phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://kuzutuzo.ru/strik?utm_term=gba+emulator+ios+14 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4495390/normal_604e629acb9ff.pdfIn PDF document text
    • https://xanowiporak.weebly.com/uploads/1/3/0/8/130814060/2872139.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445532/normal_5fde0b13ca54a.pdfIn PDF document text
    • https://rapalavosifezo.weebly.com/uploads/1/3/4/8/134886177/2efbc1cf27eafc.pdfIn PDF document text
    • https://balijijileg.weebly.com/uploads/1/3/4/5/134505585/vowulasirije.pdfIn PDF document text
    • http://www.typoland.com/http://www.typoland.com/designers/Lukasz_Dziedzic/CopyrightIn PDF document text
    • http://www.typoland.com/In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/3c9cfe9a-05c5-4167-9441-ce3248e0e14b/cules_son_los_7_libros_apcrifos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2ddcca8c-27c5-4c81-9907-fdc4d9c354a2/what_is_the_return_type_of_constructor_in_hindi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4db48250-a61d-46b6-b978-37bdd77f5b74/nusapinotad.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ebb1a97a-6114-46a2-9a39-f0672942979b/multiplication_table_chart_printable.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7a44a141-c96e-4df6-85cb-c592c8da93b5/98357695496.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dca79dea-7ecf-4db9-b495-8277cb54812b/30038347209.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f3a66374-4c24-4cde-a13b-2b363a3bf66b/ccna_tamil_tutorial_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b216322-c1f3-453e-b860-e77c9070de17/ziveduwolurimitegazenojil.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bb2a8a71-f8c1-447a-948a-bb79b10ca41d/rhyming_dictionary_online.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/59b57729-6b0b-4979-8d3a-9ca4d0f9c58a/katha_upanishad_chariot_metaphor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f009dcd6-9461-4823-ab2c-5842adc6cdcc/fodesupesosewa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/533abf2f-7c91-47c6-b307-fe56ca3609c4/how_to_find_a_freelance_writing_job.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00014316.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14316 6168 bytes
SHA-256: 50bd8db5ff9a0f03ea6ac0366ab4ff273dceb6ff0c6101ac0faff1fd52ccc92d
font_01_sfnt_off00015288.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15288 11592 bytes
SHA-256: 04d9cdb621fbeea35b027181f9a0a7e4d75cc856554eb470d85dcc90dcdd2b4a
font_02_sfnt_off000178c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x178C2 5144 bytes
SHA-256: 63c297e689ff3a87ae766c8523be2ea0c1863c1051c303f84dffcffa3fd3cd32
font_03_sfnt_off00018a32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18A32 15396 bytes
SHA-256: e497aee6090e9f83e8833014409706394649a9deaab358395dbf2dfb7b5783b6